{"id":1966,"date":"2026-04-16T22:49:34","date_gmt":"2026-04-16T14:49:34","guid":{"rendered":"http:\/\/www.preluna.xyz\/?p=1966"},"modified":"2026-04-16T23:07:45","modified_gmt":"2026-04-16T15:07:45","slug":"%e5%ad%90%e7%bd%91%e5%88%92%e5%88%86-cidr-%e6%9c%80%e9%95%bf%e5%89%8d%e7%bc%80%e5%8c%b9%e9%85%8d","status":"publish","type":"post","link":"http:\/\/www.preluna.xyz\/index.php\/2026\/04\/16\/%e5%ad%90%e7%bd%91%e5%88%92%e5%88%86-cidr-%e6%9c%80%e9%95%bf%e5%89%8d%e7%bc%80%e5%8c%b9%e9%85%8d\/preluna\/text\/","title":{"rendered":"\u5b50\u7f51\u5212\u5206 \/ CIDR \/ \u6700\u957f\u524d\u7f00\u5339\u914d"},"content":{"rendered":"\n<figure class=\"wp-block-image size-large\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/www.preluna.xyz\/wp-content\/uploads\/2026\/04\/1-768x1024.jpg'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"768\" height=\"1024\" data-original=\"http:\/\/www.preluna.xyz\/wp-content\/uploads\/2026\/04\/1-768x1024.jpg\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-1967\"  sizes=\"auto, (max-width: 768px) 100vw, 768px\" \/><\/div><\/figure>\n\n\n\n<p>\u8fd9\u51e0\u9898\u672c\u8d28\u4e0a\u4e3b\u8981\u8003\u4e24\u7c7b\u5185\u5bb9\uff1a<\/p>\n\n\n\n<p>\u4e00\u7c7b\u662f IP \u5206\u7247\uff1b\u53e6\u4e00\u7c7b\u662f \u5b50\u7f51\u5212\u5206 \/ CIDR \/ \u6700\u957f\u524d\u7f00\u5339\u914d\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u7b2c1\u9898\uff1aIP \u5206\u7247<\/h2>\n\n\n\n<p>\u9898\u76ee\uff1a\u4e00\u4e2a IP \u6570\u636e\u62a5\u603b\u957f\u5ea6 4000B\uff0c\u9996\u90e8\u56fa\u5b9a 20B\uff0c\u7ecf\u8fc7\u7684\u7f51\u7edc\u6700\u5927\u53ef\u4f20\u9001\u957f\u5ea6\u4e3a 1500B\u3002\u95ee\u5e94\u5212\u5206\u4e3a\u51e0\u4e2a\u5206\u7247\uff1f\u5404\u5206\u7247\u6570\u636e\u957f\u5ea6\u3001\u7247\u504f\u79fb\u3001MF \u662f\u591a\u5c11\uff1f<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u5148\u7ed9\u7ed3\u8bba<\/h3>\n\n\n\n<p>\u5e94\u5206\u4e3a <strong>3 \u4e2a\u5206\u7247<\/strong>\u3002<\/p>\n\n\n\n<p>\u539f\u6570\u636e\u62a5\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u603b\u957f\u5ea6 = 4000B<\/li>\n\n\n\n<li>\u9996\u90e8 = 20B<\/li>\n\n\n\n<li>\u6570\u636e\u90e8\u5206 = 3980B<\/li>\n<\/ul>\n\n\n\n<p>\u7531\u4e8e\u7f51\u7edc\u6700\u5927\u4f20\u9001\u957f\u5ea6\u4e3a 1500B\uff0c\u6240\u4ee5\u6bcf\u4e2a\u5206\u7247\u7684\u603b\u957f\u5ea6\u90fd\u4e0d\u80fd\u8d85\u8fc7 1500B\u3002<br>\u6bcf\u4e2a\u5206\u7247\u9996\u90e8\u4ecd\u662f 20B\uff0c\u6240\u4ee5\u6bcf\u4e2a\u5206\u7247\u7684\u6570\u636e\u90e8\u5206\u6700\u591a\u4e3a\uff1a<\/p>\n\n\n\n<p><code>1500 - 20 = 1480B<\/code><\/p>\n\n\n\n<p>\u5e76\u4e14\u6ce8\u610f\uff1a<\/p>\n\n\n\n<p><strong>\u9664\u6700\u540e\u4e00\u4e2a\u5206\u7247\u5916\uff0c\u6570\u636e\u90e8\u5206\u957f\u5ea6\u5fc5\u987b\u662f 8B \u7684\u6574\u6570\u500d\u3002<\/strong><\/p>\n\n\n\n<p>1480 \u6070\u597d\u662f 8 \u7684\u6574\u6570\u500d\uff0c\u6240\u4ee5\u524d\u4e24\u4e2a\u5206\u7247\u90fd\u53ef\u4ee5\u53d6 1480B\u3002<\/p>\n\n\n\n<p>\u4e8e\u662f\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u7b2c1\u7247\u6570\u636e\uff1a1480B<\/li>\n\n\n\n<li>\u7b2c2\u7247\u6570\u636e\uff1a1480B<\/li>\n\n\n\n<li>\u5269\u4f59\u6570\u636e\uff1a<code>3980 - 1480 - 1480 = 1020B<\/code><\/li>\n<\/ul>\n\n\n\n<p>\u6240\u4ee5 3 \u4e2a\u5206\u7247\u7684\u6570\u636e\u90e8\u5206\u957f\u5ea6\u5206\u522b\u4e3a\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u7b2c1\u7247\uff1a1480B<\/li>\n\n\n\n<li>\u7b2c2\u7247\uff1a1480B<\/li>\n\n\n\n<li>\u7b2c3\u7247\uff1a1020B<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u7247\u504f\u79fb\u600e\u4e48\u6c42<\/h3>\n\n\n\n<p>\u7247\u504f\u79fb\u7684\u5355\u4f4d\u662f <strong>8B<\/strong>\uff0c\u4e0d\u662f\u5b57\u8282\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u7b2c1\u7247\u4ece\u539f\u6570\u636e\u7684\u7b2c 0 \u5b57\u8282\u5f00\u59cb\uff0c\u6240\u4ee5\u7247\u504f\u79fb = <code>0\/8 = 0<\/code><\/li>\n\n\n\n<li>\u7b2c2\u7247\u4ece\u7b2c 1480 \u5b57\u8282\u5f00\u59cb\uff0c\u6240\u4ee5\u7247\u504f\u79fb = <code>1480\/8 = 185<\/code><\/li>\n\n\n\n<li>\u7b2c3\u7247\u4ece\u7b2c <code>1480+1480=2960<\/code> \u5b57\u8282\u5f00\u59cb\uff0c\u6240\u4ee5\u7247\u504f\u79fb = <code>2960\/8 = 370<\/code><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">MF \u6807\u5fd7<\/h3>\n\n\n\n<p>MF \u8868\u793a\u201c\u540e\u9762\u662f\u5426\u8fd8\u6709\u5206\u7247\u201d\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u7b2c1\u7247\uff1a\u540e\u9762\u8fd8\u6709\uff0cMF = 1<\/li>\n\n\n\n<li>\u7b2c2\u7247\uff1a\u540e\u9762\u8fd8\u6709\uff0cMF = 1<\/li>\n\n\n\n<li>\u7b2c3\u7247\uff1a\u6700\u540e\u4e00\u7247\uff0cMF = 0<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u672c\u9898\u7b54\u6848\u6574\u7406<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u5206\u7247<\/th><th>\u6570\u636e\u90e8\u5206\u957f\u5ea6<\/th><th>\u603b\u957f\u5ea6<\/th><th>\u7247\u504f\u79fb<\/th><th>MF<\/th><\/tr><\/thead><tbody><tr><td>1<\/td><td>1480B<\/td><td>1500B<\/td><td>0<\/td><td>1<\/td><\/tr><tr><td>2<\/td><td>1480B<\/td><td>1500B<\/td><td>185<\/td><td>1<\/td><\/tr><tr><td>3<\/td><td>1020B<\/td><td>1040B<\/td><td>370<\/td><td>0<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">\u6613\u9519\u70b9<\/h3>\n\n\n\n<p>\u8fd9\u9898\u6700\u5bb9\u6613\u9519\u4e24\u4e2a\u5730\u65b9\uff1a<\/p>\n\n\n\n<p>\u7b2c\u4e00\uff0c<strong>\u7247\u504f\u79fb\u5355\u4f4d\u662f 8B\uff0c\u4e0d\u662f 1B<\/strong>\u3002<br>\u7b2c\u4e8c\uff0c<strong>\u53ea\u6709\u6700\u540e\u4e00\u4e2a\u5206\u7247\u7684\u6570\u636e\u957f\u5ea6\u53ef\u4ee5\u4e0d\u6309 8B \u5bf9\u9f50<\/strong>\uff0c\u524d\u9762\u7684\u90fd\u5fc5\u987b\u662f 8 \u7684\u6574\u6570\u500d\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u7b2c2\u9898\uff1a\u7ecf\u8fc7\u4e24\u4e2a\u4e0d\u540c MTU \u7f51\u7edc\u65f6\u7684\u5206\u7247<\/h2>\n\n\n\n<p>\u9898\u76ee\uff1a\u539f IP \u6570\u636e\u62a5\u9996\u90e8 20B\uff0c\u6570\u636e 2000B\uff0c\u7ecf\u8fc7\u4e24\u4e2a\u7f51\u7edc\uff0cMTU \u5206\u522b\u4e3a 1500B \u548c 576B\u3002\u95ee\u5230\u8fbe\u76ee\u7684\u4e3b\u673a\u65f6\u5206\u6210\u51e0\u4e2a\u5c0f\u62a5\u6587\uff1f\u6bcf\u4e2a\u6570\u636e\u90e8\u5206\u957f\u5ea6\u5206\u522b\u662f\u591a\u5c11\uff1f<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u5148\u7ed9\u7ed3\u8bba<\/h3>\n\n\n\n<p>\u6700\u7ec8\u4f1a\u53d8\u6210 <strong>4 \u4e2a IP \u5206\u7247<\/strong>\uff0c\u6570\u636e\u90e8\u5206\u957f\u5ea6\u5206\u522b\u4e3a\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>552B<\/li>\n\n\n\n<li>552B<\/li>\n\n\n\n<li>376B<\/li>\n\n\n\n<li>520B<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b2c\u4e00\u6b65\uff1a\u7ecf\u8fc7 MTU = 1500B \u7684\u7f51\u7edc<\/h3>\n\n\n\n<p>\u539f\u6570\u636e\u62a5\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u9996\u90e8 20B<\/li>\n\n\n\n<li>\u6570\u636e 2000B<\/li>\n\n\n\n<li>\u603b\u957f\u5ea6 2020B<\/li>\n<\/ul>\n\n\n\n<p>\u6bcf\u7247\u6700\u5927\u6570\u636e\u957f\u5ea6\uff1a<\/p>\n\n\n\n<p><code>1500 - 20 = 1480B<\/code><\/p>\n\n\n\n<p>1480 \u662f 8 \u7684\u6574\u6570\u500d\uff0c\u6240\u4ee5\u7b2c\u4e00\u6b21\u5206\u7247\u540e\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u7b2c1\u7247\u6570\u636e\uff1a1480B<\/li>\n\n\n\n<li>\u7b2c2\u7247\u6570\u636e\uff1a<code>2000 - 1480 = 520B<\/code><\/li>\n<\/ul>\n\n\n\n<p>\u4e5f\u5c31\u662f\u8bf4\uff0c\u7b2c\u4e00\u6b21\u5206\u6210\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>1480B<\/li>\n\n\n\n<li>520B<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b2c\u4e8c\u6b65\uff1a\u518d\u7ecf\u8fc7 MTU = 576B \u7684\u7f51\u7edc<\/h3>\n\n\n\n<p>\u73b0\u5728\u8981\u770b\u8fd9\u4e24\u4e2a\u5206\u7247\u662f\u5426\u8fd8\u8981\u7ee7\u7eed\u5206\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u5bf9 1480B \u8fd9\u4e00\u7247\u518d\u5206<\/h4>\n\n\n\n<p>\u6bcf\u7247\u6700\u5927\u6570\u636e\u957f\u5ea6\uff1a<\/p>\n\n\n\n<p><code>576 - 20 = 556B<\/code><\/p>\n\n\n\n<p>\u4f46\u524d\u9762\u7684\u5206\u7247\u6570\u636e\u957f\u5ea6\u5fc5\u987b\u662f 8 \u7684\u6574\u6570\u500d\uff0c\u6240\u4ee5\u80fd\u53d6\u7684\u6700\u5927\u503c\u662f <strong>552B<\/strong>\u3002<\/p>\n\n\n\n<p>\u4e8e\u662f 1480B \u8981\u5206\u6210\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>552B<\/li>\n\n\n\n<li>552B<\/li>\n\n\n\n<li><code>1480 - 552 - 552 = 376B<\/code><\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\">\u5bf9 520B \u8fd9\u4e00\u7247\u518d\u770b<\/h4>\n\n\n\n<p>\u5b83\u7684\u603b\u957f\u5ea6\u662f\uff1a<\/p>\n\n\n\n<p><code>520 + 20 = 540B<\/code><\/p>\n\n\n\n<p>540B \u5c0f\u4e8e 576B\uff0c\u6240\u4ee5 <strong>\u4e0d\u7528\u518d\u5206\u7247<\/strong>\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u6240\u4ee5\u6700\u7ec8\u7ed3\u679c<\/h3>\n\n\n\n<p>\u6700\u7ec8\u5230\u8fbe\u76ee\u7684\u4e3b\u673a\u65f6\u5171\u6709 4 \u4e2a\u5206\u7247\uff0c\u6570\u636e\u90e8\u5206\u5206\u522b\u662f\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>552B<\/li>\n\n\n\n<li>552B<\/li>\n\n\n\n<li>376B<\/li>\n\n\n\n<li>520B<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u6613\u9519\u70b9<\/h3>\n\n\n\n<p>\u5f88\u591a\u4eba\u4f1a\u628a\u7b2c\u4e8c\u4e2a 520B \u4e5f\u7ee7\u7eed\u62c6\uff0c\u5176\u5b9e\u6ca1\u5fc5\u8981\uff0c\u56e0\u4e3a\u5b83\u52a0\u9996\u90e8\u540e\u53ea\u6709 540B\uff0c\u6ca1\u6709\u8d85\u8fc7 576B\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u7b2c3\u9898\uff1a\u7531\u7247\u504f\u79fb\u3001\u9996\u90e8\u957f\u548c\u603b\u957f\u5ea6\u6c42\u5b57\u8282\u7f16\u53f7<\/h2>\n\n\n\n<p>\u9898\u76ee\uff1a\u5230\u8fbe\u7684\u5206\u7ec4\u5206\u7247\u504f\u79fb\u503c\u4e3a 100\uff0c\u9996\u90e8\u957f\u5b57\u6bb5\u503c\u4e3a 5\uff0c\u603b\u957f\u5ea6\u5b57\u6bb5\u503c\u4e3a 100\u3002\u95ee\u6570\u636e\u90e8\u5206\u7b2c\u4e00\u4e2a\u5b57\u8282\u7f16\u53f7\u662f\u591a\u5c11\uff1f\u6700\u540e\u4e00\u4e2a\u5b57\u8282\u7f16\u53f7\u80fd\u5426\u786e\u5b9a\uff1f\u662f\u591a\u5c11\uff1f<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u5148\u7ed9\u7ed3\u8bba<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u6570\u636e\u90e8\u5206\u7b2c\u4e00\u4e2a\u5b57\u8282\u7f16\u53f7\uff1a<strong>800<\/strong><\/li>\n\n\n\n<li>\u6570\u636e\u90e8\u5206\u6700\u540e\u4e00\u4e2a\u5b57\u8282\u7f16\u53f7\uff1a<strong>879<\/strong><\/li>\n\n\n\n<li><strong>\u53ef\u4ee5\u786e\u5b9a<\/strong><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u89e3\u9898\u8fc7\u7a0b<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">1\uff09\u5148\u770b\u7247\u504f\u79fb<\/h4>\n\n\n\n<p>\u7247\u504f\u79fb = 100\uff0c\u5355\u4f4d\u662f 8B\u3002<\/p>\n\n\n\n<p>\u6240\u4ee5\u8be5\u5206\u7247\u7684\u6570\u636e\u90e8\u5206\u7b2c\u4e00\u4e2a\u5b57\u8282\uff0c\u5728\u539f\u6570\u636e\u62a5\u4e2d\u7684\u7f16\u53f7\u662f\uff1a<\/p>\n\n\n\n<p><code>100 \u00d7 8 = 800<\/code><\/p>\n\n\n\n<h4 class=\"wp-block-heading\">2\uff09\u518d\u6c42\u672c\u5206\u7247\u7684\u6570\u636e\u957f\u5ea6<\/h4>\n\n\n\n<p>\u9996\u90e8\u957f\u5b57\u6bb5\u503c\u4e3a 5\uff0c\u5355\u4f4d\u662f 4B\uff0c\u6240\u4ee5\u9996\u90e8\u957f\u4e3a\uff1a<\/p>\n\n\n\n<p><code>5 \u00d7 4 = 20B<\/code><\/p>\n\n\n\n<p>\u603b\u957f\u5ea6\u5b57\u6bb5 = 100B<\/p>\n\n\n\n<p>\u6240\u4ee5\u6570\u636e\u90e8\u5206\u957f\u5ea6\uff1a<\/p>\n\n\n\n<p><code>100 - 20 = 80B<\/code><\/p>\n\n\n\n<h4 class=\"wp-block-heading\">3\uff09\u6700\u540e\u4e00\u4e2a\u5b57\u8282\u7f16\u53f7<\/h4>\n\n\n\n<p>\u7b2c\u4e00\u4e2a\u5b57\u8282\u7f16\u53f7\u662f 800\uff0c\u4e00\u5171\u6709 80 \u4e2a\u5b57\u8282\uff0c\u6240\u4ee5\u6700\u540e\u4e00\u4e2a\u5b57\u8282\u7f16\u53f7\u4e3a\uff1a<\/p>\n\n\n\n<p><code>800 + 80 - 1 = 879<\/code><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u4e3a\u4ec0\u4e48\u201c\u80fd\u786e\u5b9a\u201d<\/h3>\n\n\n\n<p>\u56e0\u4e3a\u8fd9\u9898\u5df2\u7ecf\u7ed9\u4e86\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u7247\u504f\u79fb \u2192 \u80fd\u77e5\u9053\u8d77\u59cb\u4f4d\u7f6e<\/li>\n\n\n\n<li>\u9996\u90e8\u957f + \u603b\u957f\u5ea6 \u2192 \u80fd\u77e5\u9053\u672c\u7247\u6570\u636e\u957f\u5ea6<\/li>\n<\/ul>\n\n\n\n<p>\u6240\u4ee5\u6700\u540e\u4e00\u4e2a\u5b57\u8282\u7f16\u53f7\u5f53\u7136\u80fd\u786e\u5b9a\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<figure class=\"wp-block-image size-large\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/www.preluna.xyz\/wp-content\/uploads\/2026\/04\/9-768x1024.jpg'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"768\" height=\"1024\" data-original=\"http:\/\/www.preluna.xyz\/wp-content\/uploads\/2026\/04\/9-768x1024.jpg\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-1968\"  sizes=\"auto, (max-width: 768px) 100vw, 768px\" \/><\/div><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">\u7b2c4\u9898\uff1a4 \u4e2a \/24 \u5730\u5740\u5757\u7684\u6700\u5927\u805a\u5408<\/h2>\n\n\n\n<p>\u9898\u76ee\uff1a212.56.132.0\/24\u3001212.56.133.0\/24\u3001212.56.134.0\/24\u3001212.56.135.0\/24\uff0c\u505a\u6700\u5927\u53ef\u80fd\u805a\u5408\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u7ed3\u8bba<\/h3>\n\n\n\n<p>\u6700\u5927\u805a\u5408\u7ed3\u679c\u4e3a\uff1a<\/p>\n\n\n\n<p><strong>212.56.132.0\/22<\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u89e3\u9898\u8fc7\u7a0b<\/h3>\n\n\n\n<p>\u8fd9 4 \u4e2a \/24 \u7f51\u6bb5\u662f\u8fde\u7eed\u7684\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>132<\/li>\n\n\n\n<li>133<\/li>\n\n\n\n<li>134<\/li>\n\n\n\n<li>135<\/li>\n<\/ul>\n\n\n\n<p>4 \u4e2a\u8fde\u7eed\u7684 \/24 \u53ef\u4ee5\u5408\u5e76\u6210 1 \u4e2a \/22\u3002<br>\u56e0\u4e3a <code>\/22<\/code> \u6070\u597d\u8986\u76d6 <code>4 = 2\u00b2<\/code> \u4e2a\u8fde\u7eed\u7684 \/24 \u7f51\u7edc\u3002<\/p>\n\n\n\n<p>\u4e5f\u53ef\u4ee5\u4ece\u5757\u5927\u5c0f\u7406\u89e3\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\/24 \u662f 256 \u4e2a\u5730\u5740<\/li>\n\n\n\n<li>4 \u4e2a \/24 \u4e00\u5171 1024 \u4e2a\u5730\u5740<\/li>\n\n\n\n<li>1024 \u4e2a\u5730\u5740\u5bf9\u5e94\u524d\u7f00\u957f\u5ea6 <code>\/22<\/code><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u6613\u9519\u70b9<\/h3>\n\n\n\n<p>\u4e0d\u662f\u53ea\u8981\u8fde\u7eed\u5c31\u4e00\u5b9a\u80fd\u805a\u5408\uff0c\u8fd8\u8981\u770b\u8d77\u59cb\u5730\u5740\u662f\u5426\u5bf9\u9f50\u3002<br>\u8fd9\u91cc 132 \u6b63\u597d\u662f 4 \u7684\u500d\u6570\uff0c\u6240\u4ee5\u53ef\u4ee5\u805a\u5408\u6210 \/22\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u7b2c5\u9898\uff1a\u4e00\u4e2a C \u7c7b\u5730\u5740\u7ed9 5 \u4e2a\u90e8\u95e8\u505a\u5b50\u7f51\u5212\u5206<\/h2>\n\n\n\n<p>\u9898\u76ee\uff1a\u516c\u53f8\u6709 5 \u4e2a\u90e8\u95e8\uff0c\u6bcf\u4e2a\u90e8\u95e8 20\uff5e30 \u53f0\u8ba1\u7b97\u673a\u3002\u5730\u5740\u5757\u662f\u4e00\u4e2a C \u7c7b\u5730\u5740 192.168.161.0\uff0c\u95ee\u5982\u4f55\u5212\u5206\uff1f\u6700\u591a\u80fd\u5206\u5f00\u51e0\u4e2a\u90e8\u95e8\uff1f\u5e76\u5199\u51fa\u5404\u90e8\u95e8\u7f51\u7edc\u5730\u5740\u3001\u5b50\u7f51\u63a9\u7801\u3001\u4e3b\u673a\u8303\u56f4\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u5148\u7ed9\u7ed3\u8bba<\/h3>\n\n\n\n<p>\u5e94\u5212\u5206\u4e3a <strong>\/27 \u5b50\u7f51<\/strong>\uff0c\u5b50\u7f51\u63a9\u7801\u4e3a\uff1a<\/p>\n\n\n\n<p><strong>255.255.255.224<\/strong><\/p>\n\n\n\n<p>\u8fd9\u6837\u4e00\u4e2a \/24 \u7f51\u7edc\u53ef\u4ee5\u5212\u5206\u6210\uff1a<\/p>\n\n\n\n<p><strong>2\u00b3 = 8 \u4e2a\u5b50\u7f51<\/strong><\/p>\n\n\n\n<p>\u6240\u4ee5\u6700\u591a\u53ef\u5206\u5f00 <strong>8 \u4e2a\u90e8\u95e8<\/strong>\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u4e3a\u4ec0\u4e48\u662f \/27<\/h3>\n\n\n\n<p>\u6bcf\u4e2a\u90e8\u95e8\u6709 20\uff5e30 \u53f0\u4e3b\u673a\u3002<br>\u5b50\u7f51\u5185\u53ef\u7528\u4e3b\u673a\u6570\u81f3\u5c11\u8981\u6ee1\u8db3 30 \u53f0\u3002<\/p>\n\n\n\n<p>\u8bbe\u4e3b\u673a\u4f4d\u6570\u4e3a h\uff0c\u5219\uff1a<\/p>\n\n\n\n<p><code>2^h - 2 \u2265 30<\/code><\/p>\n\n\n\n<p>\u8bd5\u4e00\u4e0b\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>h = 4 \u65f6\uff0c<code>2^4 - 2 = 14<\/code>\uff0c\u4e0d\u591f<\/li>\n\n\n\n<li>h = 5 \u65f6\uff0c<code>2^5 - 2 = 30<\/code>\uff0c\u521a\u597d\u591f<\/li>\n<\/ul>\n\n\n\n<p>\u6240\u4ee5\u4e3b\u673a\u4f4d\u8981\u4fdd\u7559 5 \u4f4d\u3002<br>\u539f\u6765\u662f C \u7c7b\u5730\u5740\uff0c\u9ed8\u8ba4\u524d\u7f00 \/24\uff0c\u6240\u4ee5\u5b50\u7f51\u524d\u7f00\u4e3a\uff1a<\/p>\n\n\n\n<p><code>32 - 5 = \/27<\/code><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\/27 \u7684\u5757\u5927\u5c0f<\/h3>\n\n\n\n<p>\u6700\u540e\u4e00\u6bb5\u5757\u5927\u5c0f\uff1a<\/p>\n\n\n\n<p><code>256 - 224 = 32<\/code><\/p>\n\n\n\n<p>\u6240\u4ee5\u5404\u5b50\u7f51\u7f51\u7edc\u5730\u5740\u6bcf\u6b21\u52a0 32\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>192.168.161.0\/27<\/li>\n\n\n\n<li>192.168.161.32\/27<\/li>\n\n\n\n<li>192.168.161.64\/27<\/li>\n\n\n\n<li>192.168.161.96\/27<\/li>\n\n\n\n<li>192.168.161.128\/27<\/li>\n\n\n\n<li>192.168.161.160\/27<\/li>\n\n\n\n<li>192.168.161.192\/27<\/li>\n\n\n\n<li>192.168.161.224\/27<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u7ed9 5 \u4e2a\u90e8\u95e8\u5206\u914d<\/h3>\n\n\n\n<p>\u53ef\u4ee5\u6309\u987a\u5e8f\u5206\u914d\uff0c\u4f8b\u5982\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u90e8\u95e8<\/th><th>\u7f51\u7edc\u5730\u5740<\/th><th>\u5b50\u7f51\u63a9\u7801<\/th><th>\u53ef\u7528\u4e3b\u673a\u8303\u56f4<\/th><\/tr><\/thead><tbody><tr><td>\u5de5\u7a0b\u6280\u672f\u90e8<\/td><td>192.168.161.0\/27<\/td><td>255.255.255.224<\/td><td>192.168.161.1 \uff5e 192.168.161.30<\/td><\/tr><tr><td>\u5e02\u573a\u90e8<\/td><td>192.168.161.32\/27<\/td><td>255.255.255.224<\/td><td>192.168.161.33 \uff5e 192.168.161.62<\/td><\/tr><tr><td>\u552e\u540e\u90e8<\/td><td>192.168.161.64\/27<\/td><td>255.255.255.224<\/td><td>192.168.161.65 \uff5e 192.168.161.94<\/td><\/tr><tr><td>\u8d22\u52a1\u90e8<\/td><td>192.168.161.96\/27<\/td><td>255.255.255.224<\/td><td>192.168.161.97 \uff5e 192.168.161.126<\/td><\/tr><tr><td>\u529e\u516c\u5ba4<\/td><td>192.168.161.128\/27<\/td><td>255.255.255.224<\/td><td>192.168.161.129 \uff5e 192.168.161.158<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>\u5269\u4f59\u8fd8\u53ef\u4fdd\u7559 3 \u4e2a\u5b50\u7f51\u5907\u7528\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u6613\u9519\u70b9<\/h3>\n\n\n\n<p>\u8fd9\u9898\u5f88\u5bb9\u6613\u6709\u4eba\u5206\u6210 \/28\u3002<br>\u4f46 \/28 \u53ea\u6709 <code>2^4 - 2 = 14<\/code> \u4e2a\u53ef\u7528\u4e3b\u673a\uff0c\u8fdc\u8fdc\u4e0d\u591f 20\uff5e30 \u53f0\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u7b2c6\u9898\uff1a\u6700\u957f\u524d\u7f00\u5339\u914d + \u8865\u8def\u7531\u8868\u9879 + \u5b50\u7f51\u5212\u5206<\/h2>\n\n\n\n<p>\u9898\u76ee\u7ed9\u7684\u8def\u7531\u8868\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>131.128.56.0\/24 \u2192 A<\/li>\n\n\n\n<li>131.128.55.32\/28 \u2192 B<\/li>\n\n\n\n<li>131.128.55.32\/30 \u2192 C<\/li>\n\n\n\n<li>131.128.0.0\/16 \u2192 D<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b2c6\u9898\u7b2c1\u95ee<\/h3>\n\n\n\n<p>\u76ee\u7684\u5730\u5740\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5206\u7ec4A\uff1a131.128.55.33<\/li>\n\n\n\n<li>\u5206\u7ec4B\uff1a131.128.55.38<\/li>\n<\/ul>\n\n\n\n<p>\u95ee\u5206\u522b\u8f6c\u53d1\u5230\u54ea\u4e2a\u4e0b\u4e00\u8df3\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u7ed3\u8bba<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li>131.128.55.33 \u2192 <strong>C<\/strong><\/li>\n\n\n\n<li>131.128.55.38 \u2192 <strong>B<\/strong><\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\">\u89e3\u9898\u8fc7\u7a0b<\/h4>\n\n\n\n<p>\u6838\u5fc3\u539f\u5219\u53ea\u6709\u4e00\u4e2a\uff1a<\/p>\n\n\n\n<p><strong>\u6700\u957f\u524d\u7f00\u5339\u914d<\/strong><\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u5bf9 131.128.55.33<\/h4>\n\n\n\n<p>\u5b83\u5339\u914d\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>131.128.55.32\/28 \u2192 \u8303\u56f4 131.128.55.32 ~ 131.128.55.47<\/li>\n\n\n\n<li>131.128.55.32\/30 \u2192 \u8303\u56f4 131.128.55.32 ~ 131.128.55.35<\/li>\n\n\n\n<li>131.128.0.0\/16 \u2192 \u4e5f\u5339\u914d<\/li>\n<\/ul>\n\n\n\n<p>\u5176\u4e2d\u524d\u7f00\u6700\u957f\u7684\u662f <code>\/30<\/code>\uff0c\u6240\u4ee5\u8d70 <strong>C<\/strong>\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u5bf9 131.128.55.38<\/h4>\n\n\n\n<p>\u5b83\u5339\u914d\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>131.128.55.32\/28 \u2192 \u5339\u914d<\/li>\n\n\n\n<li>131.128.55.32\/30 \u2192 \u4e0d\u5339\u914d\uff0c\u56e0\u4e3a \/30 \u53ea\u5230 .35<\/li>\n\n\n\n<li>131.128.0.0\/16 \u2192 \u5339\u914d<\/li>\n<\/ul>\n\n\n\n<p>\u6700\u957f\u7684\u662f <code>\/28<\/code>\uff0c\u6240\u4ee5\u8d70 <strong>B<\/strong>\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b2c6\u9898\u7b2c2\u95ee<\/h3>\n\n\n\n<p>\u589e\u52a0\u4e00\u4e2a\u8868\u9879\uff0c\u4f7f\u76ee\u7684\u5730\u5740\u4e3a 131.128.55.33 \u7684\u5206\u7ec4\u8d70 A\uff0c\u4e14\u4e0d\u5f71\u54cd\u5176\u4ed6\u5730\u5740\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u7ed3\u8bba<\/h4>\n\n\n\n<p>\u589e\u52a0\uff1a<\/p>\n\n\n\n<p><strong>131.128.55.33\/32 \u2192 A<\/strong><\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u539f\u56e0<\/h4>\n\n\n\n<p>\/32 \u662f\u4e3b\u673a\u8def\u7531\uff0c\u53ea\u7cbe\u786e\u5339\u914d\u8fd9\u4e00\u4e2a IP \u5730\u5740\u3002<br>\u8fd9\u6837 131.128.55.33 \u4f1a\u4f18\u5148\u5339\u914d\u8fd9\u4e2a\u6700\u5177\u4f53\u7684\u8868\u9879\uff0c\u5176\u4ed6\u5730\u5740\u4e0d\u53d7\u5f71\u54cd\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b2c6\u9898\u7b2c3\u95ee<\/h3>\n\n\n\n<p>\u589e\u52a0\u4e00\u4e2a\u8868\u9879\uff0c\u4f7f\u4efb\u4f55\u90fd\u4e0d\u5339\u914d\u73b0\u6709\u8868\u9879\u7684 IP \u5206\u7ec4\u90fd\u8f6c\u53d1\u5230 E\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u7ed3\u8bba<\/h4>\n\n\n\n<p>\u589e\u52a0\u9ed8\u8ba4\u8def\u7531\uff1a<\/p>\n\n\n\n<p><strong>0.0.0.0\/0 \u2192 E<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b2c6\u9898\u7b2c4\u95ee<\/h3>\n\n\n\n<p>\u5c06 131.128.56.0\/24 \u5212\u5206\u4e3a 4 \u4e2a\u89c4\u6a21\u5c3d\u53ef\u80fd\u5927\u7684\u7b49\u957f\u5b50\u7f51\uff0c\u7ed9\u51fa\u63a9\u7801\u548c\u53ef\u5206\u914d\u5730\u5740\u8303\u56f4\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u7ed3\u8bba<\/h4>\n\n\n\n<p>\u5212\u5206\u6210 4 \u4e2a\u7b49\u957f\u5b50\u7f51\uff0c\u8bf4\u660e\u501f 2 \u4f4d\uff1a<\/p>\n\n\n\n<p><code>\/24 \u2192 \/26<\/code><\/p>\n\n\n\n<p>\u5b50\u7f51\u63a9\u7801\u662f\uff1a<\/p>\n\n\n\n<p><strong>255.255.255.192<\/strong><\/p>\n\n\n\n<p>4 \u4e2a\u5b50\u7f51\u5206\u522b\u4e3a\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u5b50\u7f51<\/th><th>\u7f51\u7edc\u5730\u5740<\/th><th>\u53ef\u5206\u914d\u4e3b\u673a\u8303\u56f4<\/th><\/tr><\/thead><tbody><tr><td>1<\/td><td>131.128.56.0\/26<\/td><td>131.128.56.1 \uff5e 131.128.56.62<\/td><\/tr><tr><td>2<\/td><td>131.128.56.64\/26<\/td><td>131.128.56.65 \uff5e 131.128.56.126<\/td><\/tr><tr><td>3<\/td><td>131.128.56.128\/26<\/td><td>131.128.56.129 \uff5e 131.128.56.190<\/td><\/tr><tr><td>4<\/td><td>131.128.56.192\/26<\/td><td>131.128.56.193 \uff5e 131.128.56.254<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u7b2c7\u9898\uff1aCIDR \u8def\u7531\u8868\uff0c\u5730\u5740\u7528\u5341\u516d\u8fdb\u5236\u8868\u793a<\/h2>\n\n\n\n<p>\u8def\u7531\u8868\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>C4.50.0.0\/12 \u2192 A<\/li>\n\n\n\n<li>C4.5E.10.0\/20 \u2192 B<\/li>\n\n\n\n<li>C4.60.0.0\/12 \u2192 C<\/li>\n\n\n\n<li>C4.68.0.0\/14 \u2192 D<\/li>\n\n\n\n<li>80.0.0.0\/1 \u2192 E<\/li>\n\n\n\n<li>40.0.0.0\/2 \u2192 F<\/li>\n\n\n\n<li>00.0.0.0\/2 \u2192 G<\/li>\n<\/ul>\n\n\n\n<p>\u76ee\u7684\u5730\u5740\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>C4.5E.13.87<\/li>\n\n\n\n<li>C4.5E.22.09<\/li>\n\n\n\n<li>C3.41.80.02<\/li>\n\n\n\n<li>5E.43.91.12<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\">\u5148\u7ed9\u7ed3\u8bba<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li>C4.5E.13.87 \u2192 <strong>B<\/strong><\/li>\n\n\n\n<li>C4.5E.22.09 \u2192 <strong>A<\/strong><\/li>\n\n\n\n<li>C3.41.80.02 \u2192 <strong>E<\/strong><\/li>\n\n\n\n<li>5E.43.91.12 \u2192 <strong>F<\/strong><\/li>\n<\/ol>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\u89e3\u9898\u5173\u952e<\/h3>\n\n\n\n<p>\u867d\u7136\u5199\u6210\u4e86\u5341\u516d\u8fdb\u5236\uff0c\u4f46\u89c4\u5219\u6ca1\u6709\u53d8\uff0c\u8fd8\u662f\uff1a<\/p>\n\n\n\n<p><strong>\u6700\u957f\u524d\u7f00\u5339\u914d<\/strong><\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u5148\u770b\u51e0\u4e2a\u7f51\u6bb5\u8303\u56f4<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>C4.50.0.0\/12<\/code><br>\u8868\u793a\u524d 12 \u4f4d\u56fa\u5b9a\uff0c\u6240\u4ee5\u7b2c\u4e8c\u5b57\u8282\u9ad8 4 \u4f4d\u662f 5<br>\u5373\u8303\u56f4\u5927\u81f4\u662f\uff1a<code>C4.50.0.0 ~ C4.5F.FF.FF<\/code><\/li>\n\n\n\n<li><code>C4.5E.10.0\/20<\/code><br>\u8868\u793a\u524d 20 \u4f4d\u56fa\u5b9a\uff0c\u5373\u524d\u4e24\u5b57\u8282\u56fa\u5b9a\u4e3a C4 5E\uff0c\u7b2c\u4e09\u5b57\u8282\u9ad8 4 \u4f4d\u56fa\u5b9a\u4e3a 1<br>\u5373\u8303\u56f4\uff1a<code>C4.5E.10.0 ~ C4.5E.1F.FF<\/code><\/li>\n\n\n\n<li><code>C4.60.0.0\/12<\/code><br>\u8303\u56f4\uff1a<code>C4.60.0.0 ~ C4.6F.FF.FF<\/code><\/li>\n\n\n\n<li><code>C4.68.0.0\/14<\/code><br>\u6bd4 \/12 \u66f4\u5177\u4f53\uff0c\u8986\u76d6\u7684\u662f C4.68 \u5230 C4.6B \u8fd9\u4e00\u6bb5<\/li>\n\n\n\n<li><code>80.0.0.0\/1<\/code><br>\u7b2c\u4e00\u4f4d\u662f 1\uff0c\u5373\u9ad8\u4f4d\u4e3a 1 \u7684\u4e00\u534a\u5730\u5740\u7a7a\u95f4<\/li>\n\n\n\n<li><code>40.0.0.0\/2<\/code><br>\u524d\u4e24\u4f4d\u662f 01<\/li>\n\n\n\n<li><code>00.0.0.0\/2<\/code><br>\u524d\u4e24\u4f4d\u662f 00<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\u9010\u4e2a\u5224\u65ad<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">1\uff09C4.5E.13.87<\/h4>\n\n\n\n<p>\u5b83\u5339\u914d\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>A\uff1aC4.50.0.0\/12<\/li>\n\n\n\n<li>B\uff1aC4.5E.10.0\/20<\/li>\n\n\n\n<li>E\uff1a80.0.0.0\/1<\/li>\n<\/ul>\n\n\n\n<p>\u6700\u957f\u7684\u662f <code>\/20<\/code>\uff0c\u6240\u4ee5\u53bb <strong>B<\/strong>\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">2\uff09C4.5E.22.09<\/h4>\n\n\n\n<p>\u5b83\u5339\u914d\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>A\uff1a\u5339\u914d<\/li>\n\n\n\n<li>B\uff1a\u4e0d\u5339\u914d\uff0c\u56e0\u4e3a\u7b2c\u4e09\u5b57\u8282\u662f 22\uff0c\u4e0d\u5728 10\uff5e1F \u5185<\/li>\n\n\n\n<li>E\uff1a\u5339\u914d<\/li>\n<\/ul>\n\n\n\n<p>\u6700\u957f\u7684\u662f <code>\/12<\/code>\uff0c\u6240\u4ee5\u53bb <strong>A<\/strong>\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">3\uff09C3.41.80.02<\/h4>\n\n\n\n<p>\u524d\u9762\u4e0d\u662f C4\uff0c\u6240\u4ee5 A\u3001B\u3001C\u3001D \u90fd\u4e0d\u5339\u914d\u3002<br>C3 \u7684\u4e8c\u8fdb\u5236\u9ad8\u4f4d\u662f 1\uff0c\u6240\u4ee5\u5339\u914d <code>80.0.0.0\/1<\/code>\uff0c\u53bb <strong>E<\/strong>\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">4\uff095E.43.91.12<\/h4>\n\n\n\n<p>5E \u7684\u4e8c\u8fdb\u5236\u9ad8\u4e24\u4f4d\u662f 01\uff0c\u6240\u4ee5\u5339\u914d <code>40.0.0.0\/2<\/code>\uff0c\u53bb <strong>F<\/strong>\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u6613\u9519\u70b9<\/h3>\n\n\n\n<p>\u8fd9\u9898\u4e0d\u662f\u8ba9\u628a\u5341\u516d\u8fdb\u5236\u5148\u5168\u8f6c\u5341\u8fdb\u5236\u518d\u505a\u3002<br>\u771f\u6b63\u4f1a\u505a\u9898\u7684\u4eba\uff0c\u770b\u5230 <code>C4.50.0.0\/12<\/code> \u8fd9\u79cd\u5199\u6cd5\uff0c\u76f4\u63a5\u5c31\u77e5\u9053\u662f\u201c\u524d 12 \u4f4d\u56fa\u5b9a\u201d\uff0c\u672c\u8d28\u8fd8\u662f\u6700\u957f\u524d\u7f00\u5339\u914d\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u7b2c8\u9898\uff1aVLSM \u53d8\u957f\u5b50\u7f51\u5212\u5206<\/h2>\n\n\n\n<p>\u9898\u76ee\uff1a\u4e00\u4e2a\u81ea\u6cbb\u7cfb\u7edf\u6709 5 \u4e2a\u5c40\u57df\u7f51\uff0cLAN2\uff5eLAN5 \u7684\u4e3b\u673a\u6570\u5206\u522b\u4e3a 91\u3001150\u30013\u300115\uff0c\u6574\u4e2a\u5730\u5740\u5757\u4e3a 30.138.118.0\/23\uff0c\u7ed9\u51fa\u6bcf\u4e2a\u5c40\u57df\u7f51\u7684\u5730\u5740\u5757\uff08\u542b\u524d\u7f00\uff09\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u5148\u8bf4\u660e\u8fd9\u9898\u7684\u5173\u952e<\/h3>\n\n\n\n<p>\u8fd9\u9898\u662f\u5178\u578b\u7684 <strong>VLSM \u53d8\u957f\u5b50\u7f51\u5212\u5206<\/strong>\u3002<\/p>\n\n\n\n<p>\u56fe\u4e2d\u5171\u6709 5 \u4e2a LAN\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>LAN1\uff1a\u4e2d\u95f4\u90a3\u6761\u4e3b\u5e72\u7f51\uff0c\u8fde\u63a5 3 \u4e2a\u8def\u7531\u5668\u63a5\u53e3<\/li>\n\n\n\n<li>LAN2\uff1a91 \u53f0\u4e3b\u673a<\/li>\n\n\n\n<li>LAN3\uff1a150 \u53f0\u4e3b\u673a<\/li>\n\n\n\n<li>LAN4\uff1a3 \u53f0\u4e3b\u673a<\/li>\n\n\n\n<li>LAN5\uff1a15 \u53f0\u4e3b\u673a<\/li>\n<\/ul>\n\n\n\n<p>\u6ce8\u610f\uff1a<\/p>\n\n\n\n<p><strong>\u5c40\u57df\u7f51\u6240\u9700\u5730\u5740\u6570 = \u4e3b\u673a\u6570 + \u8def\u7531\u5668\u63a5\u53e3\u6570<\/strong><\/p>\n\n\n\n<p>\u6240\u4ee5\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>LAN2 \u9700\u8981\u81f3\u5c11 92 \u4e2a\u5730\u5740<\/li>\n\n\n\n<li>LAN3 \u9700\u8981\u81f3\u5c11 151 \u4e2a\u5730\u5740<\/li>\n\n\n\n<li>LAN4 \u9700\u8981\u81f3\u5c11 4 \u4e2a\u5730\u5740<\/li>\n\n\n\n<li>LAN5 \u9700\u8981\u81f3\u5c11 16 \u4e2a\u5730\u5740<\/li>\n\n\n\n<li>LAN1 \u9700\u8981\u81f3\u5c11 3 \u4e2a\u5730\u5740\uff083 \u4e2a\u8def\u7531\u5668\u63a5\u53e3\uff09<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\u5404 LAN \u81f3\u5c11\u9700\u8981\u4ec0\u4e48\u524d\u7f00<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">LAN3\uff1a150 \u4e3b\u673a + 1 \u8def\u7531\u5668\u63a5\u53e3 = 151<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\/25 \u53ef\u7528\u4e3b\u673a\u6570 126\uff0c\u4e0d\u591f<\/li>\n\n\n\n<li>\/24 \u53ef\u7528\u4e3b\u673a\u6570 254\uff0c\u591f<\/li>\n<\/ul>\n\n\n\n<p>\u6240\u4ee5 LAN3 \u7528 <strong>\/24<\/strong><\/p>\n\n\n\n<h4 class=\"wp-block-heading\">LAN2\uff1a91 + 1 = 92<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\/25 \u53ef\u7528\u4e3b\u673a\u6570 126\uff0c\u591f<\/li>\n<\/ul>\n\n\n\n<p>\u6240\u4ee5 LAN2 \u7528 <strong>\/25<\/strong><\/p>\n\n\n\n<h4 class=\"wp-block-heading\">LAN5\uff1a15 + 1 = 16<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\/28 \u53ef\u7528\u4e3b\u673a\u6570 14\uff0c\u4e0d\u591f<\/li>\n\n\n\n<li>\/27 \u53ef\u7528\u4e3b\u673a\u6570 30\uff0c\u591f<\/li>\n<\/ul>\n\n\n\n<p>\u6240\u4ee5 LAN5 \u7528 <strong>\/27<\/strong><\/p>\n\n\n\n<h4 class=\"wp-block-heading\">LAN4\uff1a3 + 1 = 4<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\/30 \u53ef\u7528\u4e3b\u673a\u6570 2\uff0c\u4e0d\u591f<\/li>\n\n\n\n<li>\/29 \u53ef\u7528\u4e3b\u673a\u6570 6\uff0c\u591f<\/li>\n<\/ul>\n\n\n\n<p>\u6240\u4ee5 LAN4 \u7528 <strong>\/29<\/strong><\/p>\n\n\n\n<h4 class=\"wp-block-heading\">LAN1\uff1a3 \u4e2a\u8def\u7531\u5668\u63a5\u53e3<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\/29 \u53ef\u7528\u4e3b\u673a\u6570 6\uff0c\u591f<\/li>\n<\/ul>\n\n\n\n<p>\u6240\u4ee5 LAN1 \u7528 <strong>\/29<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\u5f00\u59cb\u4ece\u5927\u5230\u5c0f\u5206\u914d<\/h3>\n\n\n\n<p>\u6574\u4e2a\u5730\u5740\u5757\uff1a<\/p>\n\n\n\n<p><strong>30.138.118.0\/23<\/strong><\/p>\n\n\n\n<p>\u5b83\u5305\u542b\u4e24\u4e2a\u8fde\u7eed\u7684 \/24\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>30.138.118.0\/24<\/li>\n\n\n\n<li>30.138.119.0\/24<\/li>\n<\/ul>\n\n\n\n<p>\u4e00\u79cd\u5408\u7406\u5212\u5206\u5982\u4e0b\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>LAN<\/th><th>\u5730\u5740\u5757<\/th><\/tr><\/thead><tbody><tr><td>LAN3<\/td><td>30.138.118.0\/24<\/td><\/tr><tr><td>LAN2<\/td><td>30.138.119.0\/25<\/td><\/tr><tr><td>LAN5<\/td><td>30.138.119.128\/27<\/td><\/tr><tr><td>LAN4<\/td><td>30.138.119.160\/29<\/td><\/tr><tr><td>LAN1<\/td><td>30.138.119.168\/29<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>\u8fd9\u5c31\u662f\u4e00\u7ec4\u5b8c\u5168\u53ef\u884c\u7684\u7b54\u6848\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u4e3a\u4ec0\u4e48\u8fd9\u79cd\u9898\u8981\u201c\u5148\u5927\u540e\u5c0f\u201d<\/h3>\n\n\n\n<p>\u56e0\u4e3a VLSM \u9898\u76ee\u5982\u679c\u5148\u628a\u5c0f\u7f51\u6bb5\u4e71\u5207\uff0c\u5f88\u5bb9\u6613\u628a\u5927\u7f51\u6bb5\u5207\u788e\uff0c\u540e\u9762 \/24\u3001\/25 \u653e\u4e0d\u4e0b\u3002<br>\u6240\u4ee5\u8003\u8bd5\u65f6\u56fa\u5b9a\u5957\u8def\u5c31\u662f\uff1a<\/p>\n\n\n\n<p><strong>\u5148\u6309\u4e3b\u673a\u6570\u4ece\u5927\u5230\u5c0f\u6392\u5e8f\uff0c\u518d\u4f9d\u6b21\u5206\u914d\u3002<\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u6613\u9519\u70b9<\/h3>\n\n\n\n<p>\u6700\u5bb9\u6613\u9519\u7684\u662f LAN5\u3002<br>\u5f88\u591a\u4eba\u770b\u5230 15 \u53f0\u4e3b\u673a\u5c31\u76f4\u63a5\u60f3\u5230 \/28\uff0c\u4f46\u522b\u5fd8\u4e86\u8fd8\u8981\u7ed9\u8be5 LAN \u7684\u8def\u7531\u5668\u63a5\u53e3\u5206\u914d\u4e00\u4e2a IP\uff0c\u6240\u4ee5 15 + 1 = 16\uff0c\/28 \u4e0d\u591f\uff0c\u53ea\u80fd\u7528 \/27\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u7b2c9\u9898\uff1a\u6309 \/28 \u5224\u65ad\u7f51\u6bb5<\/h2>\n\n\n\n<p>\u9898\u76ee\uff1aA\uff5eE 5 \u53f0\u4e3b\u673a\u5730\u5740\u5206\u522b\u4e3a\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>A\uff1a192.168.75.18<\/li>\n\n\n\n<li>B\uff1a192.168.75.146<\/li>\n\n\n\n<li>C\uff1a192.168.75.158<\/li>\n\n\n\n<li>D\uff1a192.168.75.161<\/li>\n\n\n\n<li>E\uff1a192.168.75.173<\/li>\n<\/ul>\n\n\n\n<p>\u5171\u540c\u5b50\u7f51\u63a9\u7801\u662f 255.255.255.240\u3002<\/p>\n\n\n\n<p>\u95ee\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u8fd9 5 \u53f0\u4e3b\u673a\u5206\u5c5e\u51e0\u4e2a\u7f51\u6bb5\uff1f\u54ea\u4e9b\u4e3b\u673a\u540c\u4e00\u7f51\u6bb5\uff1f\u4e3b\u673a D \u7684\u7f51\u7edc\u5730\u5740\u662f\u591a\u5c11\uff1f<\/li>\n\n\n\n<li>\u82e5\u52a0\u5165\u7b2c 6 \u53f0\u4e3b\u673a F\uff0c\u4f7f\u5b83\u548c A \u540c\u4e00\u7f51\u6bb5\uff0c\u5219\u5176 IP \u8303\u56f4\u662f\u591a\u5c11\uff1f<\/li>\n\n\n\n<li>\u82e5\u53e6\u52a0\u4e00\u53f0\u4e3b\u673a IP \u4e3a 192.168.75.164\uff0c\u5219\u5b83\u7684\u5e7f\u64ad\u5730\u5740\u662f\u591a\u5c11\uff1f<\/li>\n<\/ol>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\u5148\u770b\u63a9\u7801<\/h3>\n\n\n\n<p>255.255.255.240 \u5bf9\u5e94 <strong>\/28<\/strong><\/p>\n\n\n\n<p>\u5757\u5927\u5c0f\uff1a<\/p>\n\n\n\n<p><code>256 - 240 = 16<\/code><\/p>\n\n\n\n<p>\u6240\u4ee5\u6bcf\u4e2a\u5b50\u7f51\u6309 16 \u9012\u589e\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>0\uff5e15<\/li>\n\n\n\n<li>16\uff5e31<\/li>\n\n\n\n<li>32\uff5e47<\/li>\n\n\n\n<li>&#8230;<\/li>\n\n\n\n<li>144\uff5e159<\/li>\n\n\n\n<li>160\uff5e175<\/li>\n\n\n\n<li>&#8230;<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b2c9\u9898\u7b2c1\u95ee<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">A\uff1a192.168.75.18<\/h4>\n\n\n\n<p>\u843d\u5728 16\uff5e31 \u6bb5<br>\u6240\u4ee5\u7f51\u7edc\u5730\u5740\u662f\uff1a<\/p>\n\n\n\n<p><strong>192.168.75.16<\/strong><\/p>\n\n\n\n<h4 class=\"wp-block-heading\">B\uff1a192.168.75.146<\/h4>\n\n\n\n<p>\u843d\u5728 144\uff5e159 \u6bb5<br>\u7f51\u7edc\u5730\u5740\uff1a<\/p>\n\n\n\n<p><strong>192.168.75.144<\/strong><\/p>\n\n\n\n<h4 class=\"wp-block-heading\">C\uff1a192.168.75.158<\/h4>\n\n\n\n<p>\u4e5f\u843d\u5728 144\uff5e159 \u6bb5<br>\u7f51\u7edc\u5730\u5740\uff1a<\/p>\n\n\n\n<p><strong>192.168.75.144<\/strong><\/p>\n\n\n\n<h4 class=\"wp-block-heading\">D\uff1a192.168.75.161<\/h4>\n\n\n\n<p>\u843d\u5728 160\uff5e175 \u6bb5<br>\u7f51\u7edc\u5730\u5740\uff1a<\/p>\n\n\n\n<p><strong>192.168.75.160<\/strong><\/p>\n\n\n\n<h4 class=\"wp-block-heading\">E\uff1a192.168.75.173<\/h4>\n\n\n\n<p>\u4e5f\u843d\u5728 160\uff5e175 \u6bb5<br>\u7f51\u7edc\u5730\u5740\uff1a<\/p>\n\n\n\n<p><strong>192.168.75.160<\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u6240\u4ee5\u7b54\u6848<\/h3>\n\n\n\n<p>\u5171\u5206\u5c5e <strong>3 \u4e2a\u7f51\u6bb5<\/strong>\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>192.168.75.16\/28\uff1aA<\/li>\n\n\n\n<li>192.168.75.144\/28\uff1aB\u3001C<\/li>\n\n\n\n<li>192.168.75.160\/28\uff1aD\u3001E<\/li>\n<\/ol>\n\n\n\n<p>\u540c\u4e00\u7f51\u6bb5\u7684\u4e3b\u673a\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>B \u548c C \u540c\u4e00\u7f51\u6bb5<\/li>\n\n\n\n<li>D \u548c E \u540c\u4e00\u7f51\u6bb5<\/li>\n\n\n\n<li>A \u5355\u72ec\u4e00\u4e2a\u7f51\u6bb5<\/li>\n<\/ul>\n\n\n\n<p>\u4e3b\u673a D \u7684\u7f51\u7edc\u5730\u5740\u662f\uff1a<\/p>\n\n\n\n<p><strong>192.168.75.160<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b2c9\u9898\u7b2c2\u95ee<\/h3>\n\n\n\n<p>F \u8981\u548c A \u540c\u4e00\u7f51\u6bb5\u3002<\/p>\n\n\n\n<p>A \u6240\u5728\u7f51\u6bb5\u662f\uff1a<\/p>\n\n\n\n<p><strong>192.168.75.16\/28<\/strong><\/p>\n\n\n\n<p>\u8fd9\u4e2a\u7f51\u6bb5\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u7f51\u7edc\u5730\u5740\uff1a192.168.75.16<\/li>\n\n\n\n<li>\u5e7f\u64ad\u5730\u5740\uff1a192.168.75.31<\/li>\n\n\n\n<li>\u53ef\u7528\u4e3b\u673a\u5730\u5740\uff1a192.168.75.17 \uff5e 192.168.75.30<\/li>\n<\/ul>\n\n\n\n<p>A \u5df2\u7ecf\u5360\u4e86 192.168.75.18\uff0c\u6240\u4ee5 F \u53ef\u7528\u8303\u56f4\u4e3a\uff1a<\/p>\n\n\n\n<p><strong>192.168.75.17\uff0c\u6216 192.168.75.19 \uff5e 192.168.75.30<\/strong><\/p>\n\n\n\n<p>\u5982\u679c\u9898\u76ee\u53ea\u5199\u201c\u8303\u56f4\u201d\uff0c\u4e5f\u53ef\u4ee5\u5199\u6210\uff1a<\/p>\n\n\n\n<p><strong>192.168.75.17 \uff5e 192.168.75.30\uff08\u4f46\u4e0d\u80fd\u53d6 192.168.75.18\uff09<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b2c9\u9898\u7b2c3\u95ee<\/h3>\n\n\n\n<p>\u65b0\u589e\u4e3b\u673a IP = 192.168.75.164<\/p>\n\n\n\n<p>164 \u843d\u5728 160\uff5e175 \u6bb5\uff0c\u6240\u4ee5\u5b83\u6240\u5728\u7f51\u6bb5\u662f\uff1a<\/p>\n\n\n\n<p><strong>192.168.75.160\/28<\/strong><\/p>\n\n\n\n<p>\u56e0\u6b64\u5e7f\u64ad\u5730\u5740\u4e3a\uff1a<\/p>\n\n\n\n<p><strong>192.168.75.175<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u8fd9 9 \u9898\u80cc\u540e\u7684\u7edf\u4e00\u505a\u9898\u5957\u8def<\/h2>\n\n\n\n<p>\u8fd9\u7ec4\u9898\u5176\u5b9e\u5f88\u9002\u5408\u6574\u7406\u6210\u4e24\u4e2a\u6a21\u677f\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u4e00\u7c7b\uff1aIP \u5206\u7247\u9898\u6a21\u677f<\/h3>\n\n\n\n<p>\u5148\u505a\u8fd9\u56db\u6b65\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u5148\u6c42\u539f\u6570\u636e\u90e8\u5206\u957f\u5ea6<br><code>\u6570\u636e\u957f\u5ea6 = \u603b\u957f\u5ea6 - \u9996\u90e8\u957f\u5ea6<\/code><\/li>\n\n\n\n<li>\u6c42\u5f53\u524d\u7f51\u7edc\u5141\u8bb8\u7684\u6700\u5927\u5206\u7247\u6570\u636e\u957f\u5ea6<br><code>\u6700\u5927\u6570\u636e\u957f\u5ea6 = MTU - \u9996\u90e8\u957f\u5ea6<\/code><\/li>\n\n\n\n<li>\u9664\u6700\u540e\u4e00\u7247\u5916\uff0c\u6309 <strong>8B \u5bf9\u9f50<\/strong><\/li>\n\n\n\n<li>\u7247\u504f\u79fb = \u201c\u672c\u7247\u8d77\u59cb\u6570\u636e\u5b57\u8282\u53f7 \u00f7 8\u201d<\/li>\n<\/ol>\n\n\n\n<p>\u53ea\u8981\u7262\u7262\u8bb0\u4f4f\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u9996\u90e8\u6bcf\u7247\u90fd\u5e26<\/li>\n\n\n\n<li>\u524d\u51e0\u7247\u8981 8B \u5bf9\u9f50<\/li>\n\n\n\n<li>\u7247\u504f\u79fb\u5355\u4f4d\u662f 8B<\/li>\n<\/ul>\n\n\n\n<p>\u8fd9\u7c7b\u9898\u57fa\u672c\u5c31\u7a33\u4e86\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u4e00\u7c7b\uff1a\u5b50\u7f51\u5212\u5206 \/ \u8def\u7531\u805a\u5408 \/ CIDR \u9898\u6a21\u677f<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">\u5b50\u7f51\u5212\u5206\u9898<\/h4>\n\n\n\n<p>\u5148\u770b\u9700\u8981\u591a\u5c11\u4e3b\u673a\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u6ee1\u8db3 <code>2^h - 2 \u2265 \u4e3b\u673a\u6570<\/code><\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\">\u5feb\u901f\u770b\u5757\u5927\u5c0f<\/h4>\n\n\n\n<p>\u5757\u5927\u5c0f = <code>256 - \u63a9\u7801\u6700\u540e\u4e00\u6bb5<\/code><\/p>\n\n\n\n<p>\u4f8b\u5982\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\/27 \u2192 255.255.255.224 \u2192 \u5757\u5927\u5c0f 32<\/li>\n\n\n\n<li>\/28 \u2192 255.255.255.240 \u2192 \u5757\u5927\u5c0f 16<\/li>\n\n\n\n<li>\/26 \u2192 255.255.255.192 \u2192 \u5757\u5927\u5c0f 64<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\">\u5224\u65ad\u67d0\u4e3b\u673a\u843d\u5728\u54ea\u4e2a\u5b50\u7f51<\/h4>\n\n\n\n<p>\u770b\u6700\u540e\u4e00\u6bb5\u843d\u5728\u54ea\u4e2a\u5757\u533a\u95f4\u91cc\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">CIDR \u8def\u7531\u9898<\/h4>\n\n\n\n<p>\u6c38\u8fdc\u6293\u4f4f\u4e00\u53e5\u8bdd\uff1a<\/p>\n\n\n\n<p><strong>\u4e0d\u662f\u770b\u8c01\u5148\u5339\u914d\uff0c\u800c\u662f\u770b\u8c01\u5339\u914d\u5f97\u66f4\u957f\u3002<\/strong><\/p>\n\n\n\n<p>\u4e5f\u5c31\u662f\u6700\u957f\u524d\u7f00\u5339\u914d\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<figure class=\"wp-block-image size-large\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/www.preluna.xyz\/wp-content\/uploads\/2026\/04\/10-768x1024.jpg'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"768\" height=\"1024\" data-original=\"http:\/\/www.preluna.xyz\/wp-content\/uploads\/2026\/04\/10-768x1024.jpg\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-1969\"  sizes=\"auto, (max-width: 768px) 100vw, 768px\" \/><\/div><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">\u7b2c10\u9898\uff1aIPv4 \u9996\u90e8\u5b57\u6bb5\u8bc6\u522b\u4e0e\u5206\u7247\u5224\u65ad<\/h2>\n\n\n\n<p>\u8fd9\u9898\u662f\u5f88\u5178\u578b\u7684\u201c\u76f4\u63a5\u6309\u9996\u90e8\u5b57\u6bb5\u62c6\u201d\u7684\u9898\uff0c\u6838\u5fc3\u5c31\u662f\u4f1a\u8bfb IPv4 \u9996\u90e8\u3002<\/p>\n\n\n\n<p>\u9898\u76ee\u7ed9\u51fa\u7684\u9996\u90e8\u662f\uff1a<\/p>\n\n\n\n<p><code>45 00 00 54 00 03 58 50 20 06 FF F0 7C 4E 03 02 B4 0E 0F 02<\/code><\/p>\n\n\n\n<p>\u5148\u6309 IPv4 \u9996\u90e8\u683c\u5f0f\u5206\u6bb5\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>45<\/code>\uff1a\u7248\u672c\u53f7 4\uff0c\u9996\u90e8\u957f\u5ea6 5 \u4e2a\u5b57\uff0c\u5373 20B<\/li>\n\n\n\n<li><code>00<\/code><\/li>\n\n\n\n<li><code>00 54<\/code>\uff1a\u603b\u957f\u5ea6 = 0x0054 = 84B<\/li>\n\n\n\n<li><code>00 03<\/code>\uff1a\u6807\u8bc6<\/li>\n\n\n\n<li><code>58 50<\/code>\uff1a\u6807\u5fd7 + \u7247\u504f\u79fb<\/li>\n\n\n\n<li><code>20<\/code>\uff1aTTL<\/li>\n\n\n\n<li><code>06<\/code>\uff1a\u534f\u8bae = TCP<\/li>\n\n\n\n<li><code>FF F0<\/code>\uff1a\u9996\u90e8\u6821\u9a8c\u548c<\/li>\n\n\n\n<li><code>7C 4E 03 02<\/code>\uff1a\u6e90 IP<\/li>\n\n\n\n<li><code>B4 0E 0F 02<\/code>\uff1a\u76ee\u7684 IP<\/li>\n<\/ul>\n\n\n\n<p>\u6240\u4ee5\uff1a<\/p>\n\n\n\n<p>1\uff09\u6e90 IP \u5730\u5740\u548c\u76ee\u7684 IP \u5730\u5740\u5206\u522b\u662f<br>\u6e90 IP\uff1a<code>124.78.3.2<\/code><br>\u76ee\u7684 IP\uff1a<code>180.14.15.2<\/code><\/p>\n\n\n\n<p>2\uff09\u8be5\u5206\u7ec4\u6570\u636e\u90e8\u5206\u957f\u5ea6<br>\u603b\u957f\u5ea6 = 84B\uff0c\u9996\u90e8\u957f\u5ea6 = 20B<br>\u6240\u4ee5\u6570\u636e\u90e8\u5206\u957f\u5ea6 = <code>84 - 20 = 64B<\/code><\/p>\n\n\n\n<p>3\uff09\u662f\u5426\u5df2\u7ecf\u5206\u7247\uff0c\u82e5\u5206\u7247\uff0c\u504f\u79fb\u91cf\u662f\u591a\u5c11<br><code>58 50<\/code> \u8f6c\u6210\u4e8c\u8fdb\u5236\u540e\uff0c\u524d 3 \u4f4d\u662f\u6807\u5fd7\u4f4d\uff0c\u540e 13 \u4f4d\u662f\u7247\u504f\u79fb\u3002<\/p>\n\n\n\n<p><code>0x5850 = 0101 1000 0101 0000<\/code><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u6807\u5fd7\u4f4d\uff1a<code>010<\/code><\/li>\n\n\n\n<li>\u7247\u504f\u79fb\u5b57\u6bb5\uff1a<code>0x1850 = 6224<\/code><\/li>\n<\/ul>\n\n\n\n<p>\u56e0\u4e3a\u7247\u504f\u79fb\u5b57\u6bb5\u4e0d\u4e3a 0\uff0c\u6240\u4ee5\u8fd9\u4e2a IP \u5206\u7ec4<strong>\u5df2\u7ecf\u662f\u5206\u7247\u540e\u7684\u67d0\u4e00\u7247<\/strong>\u3002<\/p>\n\n\n\n<p>\u7247\u504f\u79fb\u5b57\u6bb5\u503c = <code>6224<\/code>\uff0c\u5b83\u7684\u5355\u4f4d\u662f 8B\uff0c<br>\u6240\u4ee5\u771f\u6b63\u504f\u79fb\u7684\u5b57\u8282\u6570 = <code>6224 \u00d7 8 = 49792B<\/code><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u672c\u9898\u6613\u9519\u70b9<\/h3>\n\n\n\n<p>\u5f88\u591a\u4eba\u4f1a\u53ea\u76ef\u7740 MF \u4f4d\u3002\u8fd9\u91cc\u5373\u4f7f <code>MF=0<\/code>\uff0c\u4e5f<strong>\u4e0d\u80fd\u76f4\u63a5\u8bf4\u660e\u6ca1\u6709\u5206\u7247<\/strong>\u3002<br>\u5224\u65ad\u662f\u5426\u4e3a\u5206\u7247\uff0c\u8981\u770b\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>MF=1<\/code>\uff0c\u8bf4\u660e\u540e\u9762\u8fd8\u6709\u5206\u7247<\/li>\n\n\n\n<li><code>\u7247\u504f\u79fb \u2260 0<\/code>\uff0c\u8bf4\u660e\u8fd9\u4e0d\u662f\u7b2c\u4e00\u7247\uff0c\u4e5f\u4e00\u5b9a\u662f\u5206\u7247<\/li>\n<\/ul>\n\n\n\n<p>\u4e5f\u5c31\u662f\u8bf4\uff0c\u53ea\u8981\u201c<code>MF=1<\/code> \u6216 <code>\u7247\u504f\u79fb\u22600<\/code>\u201d\uff0c\u5c31\u8bf4\u660e\u5b83\u5c5e\u4e8e\u5206\u7247\u62a5\u6587\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u7b2c11\u9898\uff1a\u4ee5\u592a\u7f51\u5e27\u4e2d\u7ee7\u7eed\u89e3\u6790 IPv4 \u5206\u7ec4<\/h2>\n\n\n\n<p>\u8fd9\u9898\u672c\u8d28\u4e0a\u662f\u201c\u94fe\u8def\u5c42 + \u7f51\u7edc\u5c42\u8054\u5408\u8bfb\u62a5\u6587\u201d\u3002<br>\u5173\u952e\u662f\u5148\u627e\u5230 IP \u5206\u7ec4\u4ece\u54ea\u91cc\u5f00\u59cb\u3002<\/p>\n\n\n\n<p>\u9898\u76ee\u7ed9\u7684\u524d 64 \u5b57\u8282\u4e2d\uff0c\u524d 14B \u662f\u4ee5\u592a\u7f51\u9996\u90e8\u3002\u524d 14B \u4e3a\uff1a<\/p>\n\n\n\n<p><code>00 1d 72 98 1d fc 00 00 5e 00 01 88 64<\/code><\/p>\n\n\n\n<p>\u5176\u4e2d\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u76ee\u7684 MAC\uff1a<code>00:1d:72:98:1d:fc<\/code>\uff0c\u6b63\u597d\u5c31\u662f\u4e3b\u673a A \u7684 MAC<\/li>\n\n\n\n<li>\u6e90 MAC\uff1a<code>00:00:5e:00:01:88<\/code><\/li>\n<\/ul>\n\n\n\n<p>\u540e\u9762\u8fd8\u6709 PPPoE\/PPP \u5b57\u6bb5\uff0c\u771f\u6b63\u7684 IPv4 \u9996\u90e8\u4ece <code>45 00 ...<\/code> \u5f00\u59cb\u3002<\/p>\n\n\n\n<p>IPv4 \u9996\u90e8\u5f00\u5934\u4e3a\uff1a<\/p>\n\n\n\n<p><code>45 00 01 90 f9 bf 40 00 33 06 f3 15 da c7 66 28 da cf 3d d3<\/code><\/p>\n\n\n\n<p>\u62c6\u5f00\u540e\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>45<\/code>\uff1aIPv4\uff0c\u9996\u90e8\u957f\u5ea6 20B<\/li>\n\n\n\n<li><code>01 90<\/code>\uff1a\u603b\u957f\u5ea6 = 0x0190 = 400B<\/li>\n\n\n\n<li><code>40 00<\/code>\uff1a\u6807\u5fd7 + \u7247\u504f\u79fb<\/li>\n\n\n\n<li>\u6e90 IP\uff1a<code>da c7 66 28<\/code> = <code>218.199.102.40<\/code><\/li>\n\n\n\n<li>\u76ee\u7684 IP\uff1a<code>da cf 3d d3<\/code> = <code>218.207.61.211<\/code><\/li>\n<\/ul>\n\n\n\n<p>\u76ee\u7684 IP \u6b63\u597d\u662f\u4e3b\u673a A \u7684 IP\uff0c\u6240\u4ee5\u8fd9\u4e2a IP \u5206\u7ec4\u786e\u5b9e\u662f\u53d1\u7ed9 A \u7684\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">1\uff09\u4e3b\u673a A \u6240\u5728\u7f51\u7edc\u7684\u7f51\u5173\u8def\u7531\u5668\u7684\u76f8\u5e94\u7aef\u53e3\u7684 MAC \u5730\u5740<\/h3>\n\n\n\n<p>A \u6536\u5230\u8fd9\u4e2a\u5e27\u65f6\uff0c\u4ee5\u592a\u7f51\u9996\u90e8\u4e2d\u7684\u6e90 MAC \u5c31\u662f\u628a\u5e27\u53d1\u7ed9 A \u7684\u90a3\u4e2a\u8bbe\u5907\u7684 MAC\uff0c\u4e5f\u5c31\u662f\u7f51\u5173\u8def\u7531\u5668\u76f8\u5e94\u7aef\u53e3\u7684 MAC\u3002<\/p>\n\n\n\n<p>\u6240\u4ee5\u7b54\u6848\u662f\uff1a<\/p>\n\n\n\n<p><code>00:00:5e:00:01:88<\/code><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">2\uff09\u8be5 IP \u5206\u7ec4\u6240\u643a\u5e26\u7684\u6570\u636e\u91cf\u4e3a\u591a\u5c11\u5b57\u8282<\/h3>\n\n\n\n<p>IP \u603b\u957f\u5ea6 = 400B<br>IP \u9996\u90e8\u957f\u5ea6 = 20B<\/p>\n\n\n\n<p>\u6240\u4ee5 IP \u6570\u636e\u90e8\u5206\u957f\u5ea6 = <code>400 - 20 = 380B<\/code><\/p>\n\n\n\n<p>\u7b54\u6848\uff1a<code>380B<\/code><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">3\uff09\u82e5\u8be5\u5206\u7ec4\u9700\u88ab\u8def\u7531\u5668\u8f6c\u53d1\u5230\u4e00\u6761 MTU \u4e3a 380B \u7684\u94fe\u8def\u4e0a\uff0c\u5219\u8def\u7531\u5668\u5c06\u505a\u4f55\u79cd\u64cd\u4f5c<\/h3>\n\n\n\n<p>\u5148\u770b IP \u9996\u90e8\u4e2d\u7684 <code>40 00<\/code>\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u6807\u5fd7\u4f4d\u662f <code>010<\/code><\/li>\n\n\n\n<li>\u5373 <code>DF=1<\/code>\uff0c\u8868\u793a<strong>\u7981\u6b62\u5206\u7247<\/strong><\/li>\n\n\n\n<li>\u7247\u504f\u79fb = 0<\/li>\n<\/ul>\n\n\n\n<p>\u800c\u8be5 IP \u5206\u7ec4\u603b\u957f\u5ea6\u4e3a 400B\uff0c\u5927\u4e8e\u94fe\u8def MTU 380B\u3002<br>\u6309\u7406\u8bf4\u5982\u679c\u5141\u8bb8\u5206\u7247\uff0c\u8def\u7531\u5668\u5e94\u8be5\u5206\u7247\uff1b\u4f46\u8fd9\u91cc <code>DF=1<\/code>\uff0c\u6240\u4ee5<strong>\u4e0d\u80fd\u5206\u7247<\/strong>\u3002<\/p>\n\n\n\n<p>\u56e0\u6b64\u8def\u7531\u5668\u4f1a\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u4e22\u5f03\u8be5\u5206\u7ec4<\/strong><\/li>\n\n\n\n<li>\u5e76\u5411\u6e90\u4e3b\u673a\u53d1\u9001 ICMP \u5dee\u9519\u62a5\u6587\uff08\u9700\u8981\u5206\u7247\u4f46 DF \u7f6e 1\uff09<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u672c\u9898\u6613\u9519\u70b9<\/h3>\n\n\n\n<p>\u8fd9\u9898\u6700\u5bb9\u6613\u9519\u5728\u4e24\u4e2a\u5730\u65b9\u3002<\/p>\n\n\n\n<p>\u7b2c\u4e00\uff0c\u5f88\u591a\u4eba\u4f1a\u628a 400B \u5f53\u6210\u6570\u636e\u957f\u5ea6\u3002\u5b9e\u9645\u4e0a 400B \u662f <strong>IP \u603b\u957f\u5ea6<\/strong>\uff0c\u6570\u636e\u957f\u5ea6\u8981\u51cf\u53bb\u9996\u90e8 20B\u3002<\/p>\n\n\n\n<p>\u7b2c\u4e8c\uff0c\u770b\u5230 MTU=380B \u5c31\u672c\u80fd\u5199\u201c\u5206\u7247\u201d\uff0c\u4f46\u8fd9\u91cc\u5fc5\u987b\u5148\u770b DF \u4f4d\u3002<br>\u53ea\u8981 <code>DF=1<\/code>\uff0c\u5c31\u4e0d\u80fd\u5206\u7247\uff0c\u53ea\u80fd\u4e22\u5f03\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u7b2c12\u9898\uff1a\u5b50\u7f51\u5212\u5206\u3001\u8def\u7531\u8f6c\u53d1\u3001\u4ea4\u6362\u673a\/\u96c6\u7ebf\u5668\u3001NAT \u7efc\u5408\u9898<\/h2>\n\n\n\n<p>\u8fd9\u9898\u7efc\u5408\u6027\u5f88\u5f3a\uff0c\u4f46\u62c6\u5f00\u540e\u5176\u5b9e\u4e0d\u96be\u3002\u5148\u628a\u62d3\u6251\u5173\u7cfb\u770b\u6e05\u695a\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5de6\u8fb9\u5c40\u57df\u7f51\uff1a<code>172.18.1.0\/25<\/code>\n<ul class=\"wp-block-list\">\n<li>H1\uff1a<code>172.18.1.33\/25<\/code><\/li>\n\n\n\n<li>H2\uff1a<code>172.18.1.11\/25<\/code><\/li>\n\n\n\n<li>R2 \u7684 E0\uff1a<code>172.18.1.126\/25<\/code><\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>\u53f3\u8fb9\u5c40\u57df\u7f51\uff1a<code>172.18.1.128\/25<\/code>\n<ul class=\"wp-block-list\">\n<li>H3\uff1a<code>172.18.1.211\/25<\/code><\/li>\n\n\n\n<li>H4\uff1a<code>172.18.1.233\/25<\/code><\/li>\n\n\n\n<li>R2 \u7684 E2\uff1a<code>172.18.1.254\/25<\/code><\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>R2 \u4e0e R1 \u4e4b\u95f4\u94fe\u8def\uff1a<code>203.10.2.0\/30<\/code>\n<ul class=\"wp-block-list\">\n<li>\u56fe\u4e2d R1 \u7684 E1 = <code>203.10.2.2\/30<\/code><\/li>\n\n\n\n<li>\u6240\u4ee5 R2 \u7684 E1 = <code>203.10.2.1\/30<\/code><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">1\uff09R2 \u7684 E1 \u63a5\u53e3 IP \u5730\u5740\u662f\u4ec0\u4e48\uff1fH1 \u7684\u9ed8\u8ba4\u7f51\u5173\u662f\u4ec0\u4e48\uff1f<\/h3>\n\n\n\n<p><code>203.10.2.0\/30<\/code> \u8fd9\u4e2a\u7f51\u6bb5\u53ef\u7528\u4e3b\u673a\u5730\u5740\u53ea\u6709\u4e24\u4e2a\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>203.10.2.1<\/code><\/li>\n\n\n\n<li><code>203.10.2.2<\/code><\/li>\n<\/ul>\n\n\n\n<p>\u9898\u76ee\u5df2\u7ecf\u7ed9\u4e86 R1 E1 = <code>203.10.2.2\/30<\/code><br>\u6240\u4ee5 R2 E1 = <code>203.10.2.1\/30<\/code><\/p>\n\n\n\n<p>H1 \u5728\u5de6\u4fa7\u5b50\u7f51 <code>172.18.1.0\/25<\/code> \u4e2d\uff0c\u5b83\u7684\u9ed8\u8ba4\u7f51\u5173\u5e94\u914d\u7f6e\u4e3a\u672c\u5b50\u7f51\u5185\u8def\u7531\u5668\u63a5\u53e3\u5730\u5740\uff0c\u5373 R2 \u7684 E0\uff1a<\/p>\n\n\n\n<p><code>172.18.1.126<\/code><\/p>\n\n\n\n<p>\u7b54\u6848\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>R2 \u7684 E1\uff1a<code>203.10.2.1\/30<\/code><\/li>\n\n\n\n<li>H1 \u9ed8\u8ba4\u7f51\u5173\uff1a<code>172.18.1.126<\/code><\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">2\uff09H1 \u5411 H3 \u53d1\u9001 IP \u5206\u7ec4 A\uff0cH3 \u56de\u590d IP \u5206\u7ec4 B\u3002\u54ea\u4e9b\u4e3b\u673a\u80fd\u6536\u5230\u5c01\u88c5 A\u3001B \u7684\u4ee5\u592a\u7f51\u5e27\uff1f<\/h3>\n\n\n\n<p>\u8fd9\u9898\u8981\u628a\u201c\u4ea4\u6362\u673a\u201d\u548c\u201c\u96c6\u7ebf\u5668\u201d\u7684\u8f6c\u53d1\u7279\u70b9\u533a\u5206\u5f00\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u5148\u5206\u6790 A\uff1aH1 \u2192 H3<\/h4>\n\n\n\n<p>H1 \u548c H3 \u4e0d\u5728\u540c\u4e00\u5b50\u7f51\uff0c\u6240\u4ee5 H1 \u53d1\u9001\u7ed9\u9ed8\u8ba4\u7f51\u5173 R2\u3002<\/p>\n\n\n\n<p>\u53c8\u56e0\u4e3a\u9898\u76ee\u8bf4\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>H1 \u548c R2 \u7684 ARP \u7f13\u5b58\u521d\u59cb\u4e3a\u7a7a<\/li>\n\n\n\n<li>\u4ea4\u6362\u673a\u4ea4\u6362\u8868\u521d\u59cb\u4e3a\u7a7a<\/li>\n<\/ul>\n\n\n\n<p>\u6240\u4ee5\u8fc7\u7a0b\u662f\uff1a<\/p>\n\n\n\n<p>\u7b2c\u4e00\u6b65\uff0cH1 \u5148\u5e7f\u64ad ARP \u8bf7\u6c42\u627e\u9ed8\u8ba4\u7f51\u5173 R2 \u7684 MAC\u3002<br>\u8fd9\u4e00\u6b65\u4ea4\u6362\u673a\u4f1a\u5b66\u4e60\u5230 H1 \u6240\u5728\u7aef\u53e3\u3002<\/p>\n\n\n\n<p>\u7b2c\u4e8c\u6b65\uff0cR2 \u5355\u64ad ARP \u5e94\u7b54\u7ed9 H1\u3002<br>\u8fd9\u4e00\u6b65\u4ea4\u6362\u673a\u4f1a\u5b66\u4e60\u5230 R2 \u6240\u5728\u7aef\u53e3\u3002<\/p>\n\n\n\n<p>\u7b2c\u4e09\u6b65\uff0cH1 \u518d\u628a IP \u5206\u7ec4 A \u5c01\u88c5\u6210\u4ee5\u592a\u7f51\u5e27\u53d1\u7ed9 R2\u3002<br>\u7531\u4e8e\u6b64\u65f6\u4ea4\u6362\u673a\u5df2\u7ecf\u77e5\u9053 R2 \u7684\u7aef\u53e3\uff0c\u6240\u4ee5\u4e0d\u4f1a\u6cdb\u6d2a\uff0c\u53ea\u4f1a\u5b9a\u5411\u8f6c\u53d1\u7ed9 R2\u3002<br>\u56e0\u6b64\u5de6\u8fb9\u4ea4\u6362\u673a\u8fd9\u4e00\u4fa7\uff0cH2 <strong>\u6536\u4e0d\u5230<\/strong>\u5c01\u88c5 A \u7684\u4ee5\u592a\u7f51\u5e27\u3002<\/p>\n\n\n\n<p>\u7b2c\u56db\u6b65\uff0cR2 \u8f6c\u53d1\u5230\u53f3\u4fa7 Hub\u3002<br>Hub \u662f\u96c6\u7ebf\u5668\uff0c\u6536\u5230\u5e27\u540e\u4f1a\u5411\u6240\u6709\u7aef\u53e3\u8f6c\u53d1\uff0c\u6240\u4ee5\u53f3\u8fb9\u7684 H3 \u548c H4 \u90fd\u80fd\u6536\u5230\u8be5\u5e27\u3002<\/p>\n\n\n\n<p>\u56e0\u6b64\uff0c\u9898\u76ee\u5982\u679c\u53ea\u95ee\u201c\u4e3b\u673a\u6709\u54ea\u4e9b\u201d\uff0c\u5219\u80fd\u6536\u5230\u5c01\u88c5 A \u7684\u4e3b\u673a\u662f\uff1a<\/p>\n\n\n\n<p><code>H3\u3001H4<\/code><\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u518d\u5206\u6790 B\uff1aH3 \u2192 H1<\/h4>\n\n\n\n<p>H3 \u53d1\u56de H1\uff0c\u4ecd\u7136\u662f\u8de8\u5b50\u7f51\u901a\u4fe1\uff0c\u6240\u4ee5 H3 \u5148\u628a\u5206\u7ec4\u4ea4\u7ed9 R2\u3002<br>\u53f3\u8fb9\u662f Hub\uff0c\u6240\u4ee5 H3 \u53d1\u51fa\u7684\u4ee5\u592a\u7f51\u5e27\u4f1a\u88ab Hub \u8f6c\u53d1\u5230\u6240\u6709\u7aef\u53e3\uff0c\u56e0\u6b64\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>R2 \u80fd\u6536\u5230<\/li>\n\n\n\n<li>H4 \u4e5f\u80fd\u6536\u5230<\/li>\n<\/ul>\n\n\n\n<p>\u7136\u540e R2 \u518d\u628a B \u8f6c\u53d1\u5230\u5de6\u8fb9\u4ea4\u6362\u673a\u3002<br>\u7531\u4e8e\u5728\u524d\u9762 H1 \u53d1 A \u65f6\uff0c\u4ea4\u6362\u673a\u5df2\u7ecf\u5b66\u5230\u4e86 H1 \u548c R2 \u7684\u7aef\u53e3\u4f4d\u7f6e\uff0c\u56e0\u6b64\u8fd9\u6b21\u4ea4\u6362\u673a\u4f1a\u628a\u5e27<strong>\u53ea\u8f6c\u53d1\u7ed9 H1<\/strong>\uff0cH2 \u6536\u4e0d\u5230\u3002<\/p>\n\n\n\n<p>\u6240\u4ee5\u80fd\u6536\u5230\u5c01\u88c5 B \u7684\u4ee5\u592a\u7f51\u5e27\u7684\u4e3b\u673a\u662f\uff1a<\/p>\n\n\n\n<p><code>H1\u3001H4<\/code><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u8fd9\u4e00\u95ee\u7684\u6807\u51c6\u7b54\u6848<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5c01\u88c5 A \u7684\u4ee5\u592a\u7f51\u5e27\uff1a<code>H3\u3001H4<\/code><\/li>\n\n\n\n<li>\u5c01\u88c5 B \u7684\u4ee5\u592a\u7f51\u5e27\uff1a<code>H1\u3001H4<\/code><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u672c\u9898\u6613\u9519\u70b9<\/h3>\n\n\n\n<p>\u6700\u5bb9\u6613\u9519\u6210\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>A\uff1aH2\u3001H3\u3001H4<\/li>\n\n\n\n<li>B\uff1aH1\u3001H2\u3001H4<\/li>\n<\/ul>\n\n\n\n<p>\u9519\u56e0\u5728\u4e8e\u5ffd\u7565\u4e86\u201cARP \u5148\u53d1\u751f\uff0c\u4ea4\u6362\u673a\u5148\u5b66\u4e60\u8868\u9879\u201d\u3002<br>\u771f\u6b63\u53d1\u6570\u636e\u5e27 A\u3001B \u65f6\uff0c\u4ea4\u6362\u673a\u5df2\u7ecf\u77e5\u9053\u76ee\u7684\u7aef\u53e3\uff0c\u4e0d\u4f1a\u518d\u6cdb\u6d2a\u7ed9 H2\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">3\uff09H1 \u53d1\u51fa\u7684\u5c01\u88c5\u6709 HTTP \u8bf7\u6c42\u62a5\u6587\u7684 IP \u5206\u7ec4 C\uff0c\u5176\u9996\u90e8\u6e90\/\u76ee\u7684 IP \u662f\u4ec0\u4e48\uff1f\u5f53 C \u4ece R2 \u8f6c\u53d1\u51fa\u53bb\u65f6\u53c8\u5206\u522b\u662f\u4ec0\u4e48\uff1f<\/h3>\n\n\n\n<p>HTTP \u8bf7\u6c42\u7684\u76ee\u6807\u662f Web \u670d\u52a1\u5668 S\uff0c\u56fe\u4e2d\u670d\u52a1\u5668\u5730\u5740\u4e3a\uff1a<\/p>\n\n\n\n<p><code>213.48.226.31<\/code><\/p>\n\n\n\n<p>\u6240\u4ee5 H1 \u4ea7\u751f IP \u5206\u7ec4 C \u65f6\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u6e90 IP = H1 \u7684 IP = <code>172.18.1.33<\/code><\/li>\n\n\n\n<li>\u76ee\u7684 IP = Web \u670d\u52a1\u5668 S \u7684 IP = <code>213.48.226.31<\/code><\/li>\n<\/ul>\n\n\n\n<p>R2 \u5177\u6709 NAT \u529f\u80fd\u3002<br>\u5f53\u5206\u7ec4\u4ece R2 \u7684\u5916\u7f51\u63a5\u53e3 E1 \u8f6c\u53d1\u51fa\u53bb\u65f6\uff0c\u6e90\u5730\u5740\u4f1a\u88ab\u8f6c\u6362\u6210 R2 \u7684\u516c\u7f51\u5730\u5740\uff0c\u4e5f\u5c31\u662f E1 \u7684\u5730\u5740\uff1a<\/p>\n\n\n\n<p><code>203.10.2.1<\/code><\/p>\n\n\n\n<p>\u76ee\u7684\u5730\u5740\u4e0d\u53d8\uff0c\u4ecd\u7136\u662f Web \u670d\u52a1\u5668\u5730\u5740\u3002<\/p>\n\n\n\n<p>\u6240\u4ee5\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>H1 \u53d1\u51fa\u65f6\uff1a\u6e90 IP <code>172.18.1.33<\/code>\uff0c\u76ee\u7684 IP <code>213.48.226.31<\/code><\/li>\n\n\n\n<li>\u7ecf R2 \u8f6c\u53d1\u540e\uff1a\u6e90 IP <code>203.10.2.1<\/code>\uff0c\u76ee\u7684 IP <code>213.48.226.31<\/code><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u8fd9\u7c7b\u9898\u7684\u5feb\u901f\u8bc6\u522b\u65b9\u6cd5<\/h3>\n\n\n\n<p>\u53ea\u8981\u9898\u76ee\u51fa\u73b0\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u201cNAT\u201d<\/li>\n\n\n\n<li>\u201c\u5185\u7f51\u79c1\u6709\u5730\u5740\u8bbf\u95ee\u5916\u7f51\u670d\u52a1\u5668\u201d<\/li>\n<\/ul>\n\n\n\n<p>\u5c31\u8981\u7acb\u5373\u60f3\u5230\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u51fa\u53bb\u65f6\u6539<strong>\u6e90 IP<\/strong><\/li>\n\n\n\n<li>\u56de\u6765\u65f6\u6539<strong>\u76ee\u7684 IP<\/strong><\/li>\n\n\n\n<li>\u5916\u7f51\u670d\u52a1\u5668\u59cb\u7ec8\u770b\u5230\u7684\u662f NAT \u8bbe\u5907\u7684\u516c\u7f51\u5730\u5740\uff0c\u800c\u4e0d\u662f\u5185\u7f51\u4e3b\u673a\u5730\u5740<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<figure class=\"wp-block-image size-large\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/www.preluna.xyz\/wp-content\/uploads\/2026\/04\/13-768x1024.jpg'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"768\" height=\"1024\" data-original=\"http:\/\/www.preluna.xyz\/wp-content\/uploads\/2026\/04\/13-768x1024.jpg\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-1970\"  sizes=\"auto, (max-width: 768px) 100vw, 768px\" \/><\/div><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">\u7b2c13\u9898\uff1a\u5b50\u7f51\u5212\u5206\u3001\u8def\u7531\u8868\u3001\u8def\u7531\u805a\u5408<\/h2>\n\n\n\n<p>\u8fd9\u9053\u9898\u662f\u975e\u5e38\u6807\u51c6\u7684\u201c\u5b50\u7f51\u5212\u5206 + \u9759\u6001\u8def\u7531 + \u8def\u7531\u6c47\u603b\u201d\u7efc\u5408\u9898\u3002<\/p>\n\n\n\n<p>\u9898\u610f\u7ed9\u51fa\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5730\u5740\u7a7a\u95f4\uff1a<code>202.118.1.0\/24<\/code><\/li>\n\n\n\n<li>\u8981\u5212\u7ed9\u5c40\u57df\u7f51 1 \u548c\u5c40\u57df\u7f51 2<\/li>\n\n\n\n<li>\u6bcf\u4e2a\u5c40\u57df\u7f51\u81f3\u5c11\u9700\u8981 120 \u4e2a\u4e3b\u673a\u5730\u5740<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">1\uff09\u5c06 202.118.1.0\/24 \u5212\u5206\u4e3a\u4e24\u4e2a\u5b50\u7f51<\/h3>\n\n\n\n<p>\u6bcf\u4e2a\u5c40\u57df\u7f51\u81f3\u5c11\u9700\u8981 120 \u4e2a\u53ef\u7528\u4e3b\u673a\u5730\u5740\u3002<\/p>\n\n\n\n<p>\u4e3b\u673a\u4f4d\u81f3\u5c11\u8981\u6ee1\u8db3\uff1a<\/p>\n\n\n\n<p><code>2^h - 2 &gt;= 120<\/code><\/p>\n\n\n\n<p>\u8bd5\u4e00\u4e0b\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>h = 6\uff0c<code>2^6 - 2 = 62<\/code>\uff0c\u4e0d\u591f<\/li>\n\n\n\n<li>h = 7\uff0c<code>2^7 - 2 = 126<\/code>\uff0c\u591f\u7528<\/li>\n<\/ul>\n\n\n\n<p>\u6240\u4ee5\u6bcf\u4e2a\u5b50\u7f51\u5fc5\u987b\u4fdd\u7559 7 \u4f4d\u4e3b\u673a\u4f4d\uff0c\u5373\u524d\u7f00\u957f\u5ea6\u4e3a\uff1a<\/p>\n\n\n\n<p><code>32 - 7 = 25<\/code><\/p>\n\n\n\n<p>\u4e5f\u5c31\u662f\u5e94\u8be5\u5212\u6210\u4e24\u4e2a <code>\/25<\/code> \u5b50\u7f51\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5c40\u57df\u7f51 1\uff1a<code>202.118.1.0\/25<\/code><\/li>\n\n\n\n<li>\u5c40\u57df\u7f51 2\uff1a<code>202.118.1.128\/25<\/code><\/li>\n<\/ul>\n\n\n\n<p>\u53ef\u7528\u5730\u5740\u8303\u56f4\u5206\u522b\u4e3a\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5c40\u57df\u7f51 1\uff1a<code>202.118.1.1 ~ 202.118.1.126<\/code><\/li>\n\n\n\n<li>\u5c40\u57df\u7f51 2\uff1a<code>202.118.1.129 ~ 202.118.1.254<\/code><\/li>\n<\/ul>\n\n\n\n<p>\u53ef\u4ee5\u7ed9 R1 \u7684\u63a5\u53e3\u5206\u914d\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>E1\uff1a<code>202.118.1.1\/25<\/code><\/li>\n\n\n\n<li>E2\uff1a<code>202.118.1.129\/25<\/code><\/li>\n<\/ul>\n\n\n\n<p>\u8fd9\u4e00\u6b65\u4e0d\u552f\u4e00\uff0c\u53ea\u8981\u5728\u5404\u81ea\u5b50\u7f51\u5185\u5408\u6cd5\u5373\u53ef\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">2\uff09\u7ed9\u51fa R1 \u7684\u8def\u7531\u8868<\/h3>\n\n\n\n<p>\u9898\u76ee\u8981\u6c42 R1 \u7684\u8def\u7531\u8868\u81f3\u5c11\u660e\u786e\u5305\u62ec\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5230\u5c40\u57df\u7f51 1 \u7684\u8def\u7531<\/li>\n\n\n\n<li>\u5230\u5c40\u57df\u7f51 2 \u7684\u8def\u7531<\/li>\n\n\n\n<li>\u5230\u57df\u540d\u670d\u52a1\u5668\u7684\u4e3b\u673a\u8def\u7531<\/li>\n\n\n\n<li>\u5230\u4e92\u8054\u7f51\u7684\u9ed8\u8ba4\u8def\u7531<\/li>\n<\/ul>\n\n\n\n<p>\u5df2\u77e5\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>R1 \u7684 L0 = <code>202.118.2.1<\/code><\/li>\n\n\n\n<li>R2 \u7684 L0 = <code>202.118.2.2<\/code><\/li>\n\n\n\n<li>R2 \u7684 E0 = <code>202.118.3.1<\/code><\/li>\n\n\n\n<li>\u57df\u540d\u670d\u52a1\u5668 = <code>202.118.3.2<\/code><\/li>\n<\/ul>\n\n\n\n<p>\u56e0\u6b64\uff0cR1 \u8def\u7531\u8868\u53ef\u5199\u4e3a\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u76ee\u7684\u7f51\u7edc IP \u5730\u5740<\/th><th>\u5b50\u7f51\u63a9\u7801<\/th><th>\u4e0b\u4e00\u8df3 IP \u5730\u5740<\/th><th>\u63a5\u53e3<\/th><\/tr><\/thead><tbody><tr><td>202.118.1.0<\/td><td>255.255.255.128<\/td><td>\u76f4\u8fde<\/td><td>E1<\/td><\/tr><tr><td>202.118.1.128<\/td><td>255.255.255.128<\/td><td>\u76f4\u8fde<\/td><td>E2<\/td><\/tr><tr><td>202.118.3.2<\/td><td>255.255.255.255<\/td><td>202.118.2.2<\/td><td>L0<\/td><\/tr><tr><td>0.0.0.0<\/td><td>0.0.0.0<\/td><td>202.118.2.2<\/td><td>L0<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>\u8fd9\u91cc\u5230\u57df\u540d\u670d\u52a1\u5668\u7528\u7684\u662f<strong>\u4e3b\u673a\u8def\u7531<\/strong>\uff0c\u6240\u4ee5\u63a9\u7801\u5199 <code>\/32<\/code>\uff0c\u5373 <code>255.255.255.255<\/code>\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">3\uff09\u91c7\u7528\u8def\u7531\u805a\u5408\u6280\u672f\uff0c\u7ed9\u51fa R2 \u5230\u5c40\u57df\u7f51 1 \u548c\u5c40\u57df\u7f51 2 \u7684\u8def\u7531<\/h3>\n\n\n\n<p>\u524d\u9762\u5df2\u7ecf\u628a\u4e24\u4e2a\u5c40\u57df\u7f51\u5212\u5206\u6210\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>202.118.1.0\/25<\/code><\/li>\n\n\n\n<li><code>202.118.1.128\/25<\/code><\/li>\n<\/ul>\n\n\n\n<p>\u8fd9\u4e24\u4e2a\u8fde\u7eed\u5b50\u7f51\u53ef\u4ee5\u805a\u5408\u4e3a\uff1a<\/p>\n\n\n\n<p><code>202.118.1.0\/24<\/code><\/p>\n\n\n\n<p>\u6240\u4ee5 R2 \u53ea\u9700\u4fdd\u7559\u4e00\u6761\u805a\u5408\u8def\u7531\u5373\u53ef\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u76ee\u7684\u7f51\u7edc IP \u5730\u5740<\/th><th>\u5b50\u7f51\u63a9\u7801<\/th><th>\u4e0b\u4e00\u8df3 IP \u5730\u5740<\/th><th>\u63a5\u53e3<\/th><\/tr><\/thead><tbody><tr><td>202.118.1.0<\/td><td>255.255.255.0<\/td><td>202.118.2.1<\/td><td>L0<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">\u672c\u9898\u6613\u9519\u70b9<\/h3>\n\n\n\n<p>\u4e00\u662f\u5bb9\u6613\u628a\u201c\u81f3\u5c11 120 \u53f0\u4e3b\u673a\u201d\u8bef\u5212\u6210 <code>\/26<\/code>\uff0c\u8fd9\u662f\u4e0d\u591f\u7684\u3002<br>\u4e8c\u662f\u4e3b\u673a\u8def\u7531\u4e00\u5b9a\u662f <code>\/32<\/code>\u3002<br>\u4e09\u662f\u505a\u8def\u7531\u805a\u5408\u65f6\uff0c\u4e0d\u662f\u7b80\u5355\u628a\u4e24\u6761\u8def\u7531\u6284\u4e00\u904d\uff0c\u800c\u662f\u8981\u627e\u5b83\u4eec\u7684\u516c\u5171\u524d\u7f00\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u7b2c14\u9898\uff1aDHCP\u3001ARP\u3001\u9ed8\u8ba4\u7f51\u5173\u7efc\u5408\u9898<\/h2>\n\n\n\n<p>\u8fd9\u9898\u662f\u7edf\u8003\u771f\u9898\u98ce\u683c\u975e\u5e38\u5f3a\u7684\u4e00\u9053\u9898\uff0c\u4e3b\u8981\u8003\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>DHCP \u52a8\u6001\u5206\u914d\u5730\u5740\u8303\u56f4<\/li>\n\n\n\n<li>DHCP Discover \u7684 IP \u5730\u5740<\/li>\n\n\n\n<li>ARP \u8bf7\u6c42\u7684\u76ee\u7684 MAC<\/li>\n\n\n\n<li>\u53d1\u5f80 Internet \u65f6\u4ee5\u592a\u7f51\u5e27\u76ee\u7684 MAC<\/li>\n\n\n\n<li>\u9ed8\u8ba4\u7f51\u5173\u914d\u7f6e\u9519\u8bef\u7684\u5f71\u54cd<\/li>\n<\/ul>\n\n\n\n<p>\u56fe\u4e2d\u5df2\u77e5\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u8def\u7531\u5668 LAN \u53e3\uff1a<code>111.123.15.1\/24<\/code>\uff0cMAC <code>00-a1-a1-a1-a1-a1<\/code><\/li>\n\n\n\n<li>DHCP \u670d\u52a1\u5668\uff1a<code>111.123.15.2\/24<\/code>\uff0cMAC <code>00-b1-b1-b1-b1-b1<\/code><\/li>\n\n\n\n<li>WWW \u670d\u52a1\u5668\uff1a<code>111.123.15.3\/24<\/code><\/li>\n\n\n\n<li>\u4e3b\u673a1\uff1a<code>111.123.15.4\/24<\/code><\/li>\n\n\n\n<li>\u4e3b\u673a2 \u5230 \u4e3b\u673aN\uff1a\u901a\u8fc7 DHCP \u83b7\u53d6\u5730\u5740<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">1\uff09DHCP \u670d\u52a1\u5668\u53ef\u4e3a\u4e3b\u673a 2\uff5eN \u52a8\u6001\u5206\u914d IP \u5730\u5740\u7684\u6700\u5927\u8303\u56f4\u662f\u4ec0\u4e48\uff1fDHCP Discover \u7684\u6e90\/\u76ee\u7684 IP \u662f\u591a\u5c11\uff1f<\/h3>\n\n\n\n<p>\u8fd9\u4e2a\u7f51\u6bb5\u662f <code>111.123.15.0\/24<\/code>\uff0c\u6240\u4ee5\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u7f51\u7edc\u5730\u5740\uff1a<code>111.123.15.0<\/code><\/li>\n\n\n\n<li>\u5e7f\u64ad\u5730\u5740\uff1a<code>111.123.15.255<\/code><\/li>\n<\/ul>\n\n\n\n<p>\u4e0d\u80fd\u5206\u914d\u3002<\/p>\n\n\n\n<p>\u53c8\u56e0\u4e3a\u4ee5\u4e0b\u5730\u5740\u5df2\u88ab\u5360\u7528\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u8def\u7531\u5668\uff1a<code>111.123.15.1<\/code><\/li>\n\n\n\n<li>DHCP \u670d\u52a1\u5668\uff1a<code>111.123.15.2<\/code><\/li>\n\n\n\n<li>WWW \u670d\u52a1\u5668\uff1a<code>111.123.15.3<\/code><\/li>\n\n\n\n<li>\u4e3b\u673a1\uff1a<code>111.123.15.4<\/code><\/li>\n<\/ul>\n\n\n\n<p>\u6240\u4ee5\u53ef\u52a8\u6001\u5206\u914d\u7684\u6700\u5927\u8303\u56f4\u662f\uff1a<\/p>\n\n\n\n<p><code>111.123.15.5 ~ 111.123.15.254<\/code><\/p>\n\n\n\n<p>DHCP Discover \u53d1\u751f\u5728\u4e3b\u673a\u5c1a\u672a\u83b7\u5f97 IP \u5730\u5740\u65f6\uff0c\u56e0\u6b64 IP \u5206\u7ec4\u4e2d\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u6e90 IP\uff1a<code>0.0.0.0<\/code><\/li>\n\n\n\n<li>\u76ee\u7684 IP\uff1a<code>255.255.255.255<\/code><\/li>\n<\/ul>\n\n\n\n<p>\u7b54\u6848\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u52a8\u6001\u5206\u914d\u8303\u56f4\uff1a<code>111.123.15.5 ~ 111.123.15.254<\/code><\/li>\n\n\n\n<li>DHCP Discover\uff1a\u6e90 IP <code>0.0.0.0<\/code>\uff0c\u76ee\u7684 IP <code>255.255.255.255<\/code><\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">2\uff09\u82e5\u4e3b\u673a 2 \u7684 ARP \u8868\u4e3a\u7a7a\uff0c\u5219\u5176\u8bbf\u95ee Internet \u65f6\uff0c\u53d1\u51fa\u7684\u7b2c\u4e00\u4e2a\u4ee5\u592a\u7f51\u5e27\u7684\u76ee\u7684 MAC \u5730\u5740\u662f\u4ec0\u4e48\uff1f\u5c01\u88c5\u4e3b\u673a 2 \u53d1\u5f80 Internet \u7684 IP \u5206\u7ec4\u7684\u4ee5\u592a\u7f51\u5e27\u76ee\u7684 MAC \u5730\u5740\u662f\u4ec0\u4e48\uff1f<\/h3>\n\n\n\n<p>\u8fd9\u9898\u4e13\u95e8\u8003\u201c\u7b2c\u4e00\u4e2a\u5e27\u201d\u548c\u201c\u771f\u6b63\u627f\u8f7d IP \u5206\u7ec4\u7684\u5e27\u201d\u4e0d\u662f\u4e00\u56de\u4e8b\u3002<\/p>\n\n\n\n<p>\u56e0\u4e3a ARP \u8868\u4e3a\u7a7a\uff0c\u4e3b\u673a 2 \u4e0d\u77e5\u9053\u9ed8\u8ba4\u7f51\u5173\u7684 MAC\uff0c\u6240\u4ee5\u5b83\u53d1\u51fa\u7684\u7b2c\u4e00\u4e2a\u4ee5\u592a\u7f51\u5e27\u4e00\u5b9a\u662f <strong>ARP \u8bf7\u6c42\u5e27<\/strong>\u3002<br>ARP \u8bf7\u6c42\u662f\u5e7f\u64ad\u5e27\uff0c\u6240\u4ee5\u76ee\u7684 MAC \u5730\u5740\u4e3a\uff1a<\/p>\n\n\n\n<p><code>FF-FF-FF-FF-FF-FF<\/code><\/p>\n\n\n\n<p>\u4e4b\u540e\u4e3b\u673a 2 \u83b7\u5f97\u9ed8\u8ba4\u7f51\u5173 MAC\uff0c\u624d\u4f1a\u53d1\u9001\u5c01\u88c5\u6709\u201c\u53d1\u5f80 Internet \u7684 IP \u5206\u7ec4\u201d\u7684\u4ee5\u592a\u7f51\u5e27\u3002<br>\u56e0\u4e3a\u76ee\u7684 IP \u5728\u5916\u7f51\uff0c\u4e0d\u5728\u672c\u5730\u5b50\u7f51\uff0c\u6240\u4ee5\u4e8c\u5c42\u76ee\u7684 MAC \u5e94\u8be5\u5199\u6210<strong>\u9ed8\u8ba4\u7f51\u5173<\/strong>\u7684 MAC\uff0c\u800c\u4e0d\u662f Internet \u4e3b\u673a\u7684 MAC\u3002<\/p>\n\n\n\n<p>\u9ed8\u8ba4\u7f51\u5173\u662f\u8def\u7531\u5668 LAN \u53e3 <code>111.123.15.1<\/code>\uff0c\u5176 MAC \u4e3a\uff1a<\/p>\n\n\n\n<p><code>00-a1-a1-a1-a1-a1<\/code><\/p>\n\n\n\n<p>\u6240\u4ee5\u7b54\u6848\u662f\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u7b2c\u4e00\u4e2a\u4ee5\u592a\u7f51\u5e27\u76ee\u7684 MAC\uff1a<code>FF-FF-FF-FF-FF-FF<\/code><\/li>\n\n\n\n<li>\u5c01\u88c5\u53d1\u5f80 Internet \u7684 IP \u5206\u7ec4\u7684\u4ee5\u592a\u7f51\u5e27\u76ee\u7684 MAC\uff1a<code>00-a1-a1-a1-a1-a1<\/code><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u8fd9\u4e00\u95ee\u4e3a\u4ec0\u4e48\u5bb9\u6613\u9519<\/h3>\n\n\n\n<p>\u5f88\u591a\u4eba\u4f1a\u628a\u201c\u53d1\u5f80 Internet \u7684 IP \u5206\u7ec4\u201d\u7684\u4e8c\u5c42\u76ee\u7684 MAC \u5199\u6210 Internet \u670d\u52a1\u5668\u7684 MAC\u3002<br>\u8fd9\u662f\u4e0d\u5bf9\u7684\u3002\u8de8\u7f51\u6bb5\u901a\u4fe1\u65f6\uff0c<strong>IP \u5c42\u76ee\u7684\u5730\u5740\u5199\u8fdc\u7aef\u4e3b\u673a\uff0c\u94fe\u8def\u5c42\u76ee\u7684\u5730\u5740\u5199\u4e0b\u4e00\u8df3\u8def\u7531\u5668<\/strong>\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">3\uff09\u82e5\u4e3b\u673a 1 \u7684\u5b50\u7f51\u63a9\u7801\u548c\u9ed8\u8ba4\u7f51\u5173\u5206\u522b\u914d\u7f6e\u4e3a 255.255.255.0 \u548c 111.123.15.2\uff0c\u5219\u8be5\u4e3b\u673a\u80fd\u5426\u8bbf\u95ee WWW \u670d\u52a1\u5668\uff1f\u80fd\u5426\u8bbf\u95ee Internet\uff1f<\/h3>\n\n\n\n<p>\u5148\u770b\u8bbf\u95ee WWW \u670d\u52a1\u5668\u3002<\/p>\n\n\n\n<p>\u4e3b\u673a1\uff1a<code>111.123.15.4\/24<\/code><br>WWW \u670d\u52a1\u5668\uff1a<code>111.123.15.3\/24<\/code><\/p>\n\n\n\n<p>\u4e8c\u8005\u540c\u5c5e <code>111.123.15.0\/24<\/code> \u7f51\u6bb5\uff0c\u6240\u4ee5\u8bbf\u95ee WWW \u670d\u52a1\u5668\u65f6\uff0c\u4e3b\u673a1\u4f1a\u8ba4\u4e3a\u5bf9\u65b9\u5728\u672c\u5730\u7f51\u6bb5\uff0c\u76f4\u63a5 ARP \u627e\u5bf9\u65b9 MAC\uff0c\u7136\u540e\u76f4\u63a5\u901a\u4fe1\u3002<br>\u56e0\u6b64\uff1a<\/p>\n\n\n\n<p><strong>\u53ef\u4ee5\u8bbf\u95ee WWW \u670d\u52a1\u5668\u3002<\/strong><\/p>\n\n\n\n<p>\u518d\u770b\u8bbf\u95ee Internet\u3002<\/p>\n\n\n\n<p>\u8bbf\u95ee Internet \u5c5e\u4e8e\u8de8\u7f51\u6bb5\u901a\u4fe1\uff0c\u5e94\u8be5\u628a\u5206\u7ec4\u4ea4\u7ed9\u9ed8\u8ba4\u7f51\u5173\u3002<br>\u4f46\u9898\u76ee\u628a\u9ed8\u8ba4\u7f51\u5173\u9519\u8bef\u5730\u914d\u7f6e\u6210\u4e86 DHCP \u670d\u52a1\u5668 <code>111.123.15.2<\/code>\u3002<br>DHCP \u670d\u52a1\u5668\u4e0d\u662f\u8def\u7531\u5668\uff0c\u4e0d\u8d1f\u8d23\u8f6c\u53d1\u5230 Internet\u3002<\/p>\n\n\n\n<p>\u56e0\u6b64\uff1a<\/p>\n\n\n\n<p><strong>\u4e0d\u80fd\u8bbf\u95ee Internet\u3002<\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u6807\u51c6\u7b54\u6848<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u80fd\u8bbf\u95ee WWW \u670d\u52a1\u5668\uff1a<strong>\u80fd<\/strong><\/li>\n\n\n\n<li>\u80fd\u8bbf\u95ee Internet\uff1a<strong>\u4e0d\u80fd<\/strong><\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u8fd9 5 \u9053\u9898\u80cc\u540e\u7684\u4e3b\u7ebf\u600e\u4e48\u4e32\u8d77\u6765<\/h2>\n\n\n\n<p>\u8fd9\u51e0\u9898\u867d\u7136\u5f62\u5f0f\u4e0d\u540c\uff0c\u4f46\u4e3b\u7ebf\u5176\u5b9e\u5f88\u7edf\u4e00\u3002<\/p>\n\n\n\n<p>\u7b2c10\u300111\u9898\u662f\u201c\u4f1a\u4e0d\u4f1a\u8bfb IPv4 \u9996\u90e8\u201d\u3002<br>\u53ea\u8981\u80fd\u719f\u7ec3\u5b9a\u4f4d\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u9996\u90e8\u957f\u5ea6<\/li>\n\n\n\n<li>\u603b\u957f\u5ea6<\/li>\n\n\n\n<li>\u6807\u5fd7\u4f4d<\/li>\n\n\n\n<li>\u7247\u504f\u79fb<\/li>\n\n\n\n<li>\u6e90\/\u76ee\u7684 IP<\/li>\n<\/ul>\n\n\n\n<p>\u8fd9\u79cd\u9898\u5c31\u80fd\u7a33\u5b9a\u62ff\u5206\u3002<\/p>\n\n\n\n<p>\u7b2c12\u9898\u8003\u7684\u662f\u201c\u8de8\u7f51\u6bb5\u901a\u4fe1\u7684\u5b8c\u6574\u94fe\u8def\u8fc7\u7a0b\u201d\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u4e3b\u673a\u5148\u627e\u9ed8\u8ba4\u7f51\u5173<\/li>\n\n\n\n<li>\u4ea4\u6362\u673a\u9760 MAC \u8868\u5b9a\u5411\u8f6c\u53d1<\/li>\n\n\n\n<li>\u96c6\u7ebf\u5668\u4f1a\u628a\u5e27\u6269\u6563\u5230\u6240\u6709\u7aef\u53e3<\/li>\n\n\n\n<li>\u8def\u7531\u5668\u6309 IP \u8f6c\u53d1<\/li>\n\n\n\n<li>NAT \u6539\u5199\u5730\u5740<\/li>\n<\/ul>\n\n\n\n<p>\u7b2c13\u9898\u8003\u7684\u662f\u201c\u5730\u5740\u89c4\u5212 + \u9759\u6001\u8def\u7531 + \u805a\u5408\u201d\u3002<br>\u6838\u5fc3\u662f\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u4e3b\u673a\u6570\u53cd\u63a8\u524d\u7f00\u957f\u5ea6<\/li>\n\n\n\n<li>\u76f4\u8fde\u8def\u7531\u548c\u4e0b\u4e00\u8df3\u8def\u7531\u533a\u5206<\/li>\n\n\n\n<li>\u4e3b\u673a\u8def\u7531\u7528 <code>\/32<\/code><\/li>\n\n\n\n<li>\u8fde\u7eed\u5b50\u7f51\u53ef\u805a\u5408<\/li>\n<\/ul>\n\n\n\n<p>\u7b2c14\u9898\u5219\u662f\u201cDHCP + ARP + \u9ed8\u8ba4\u7f51\u5173\u201d\u7684\u57fa\u7840\u7efc\u5408\u9898\u3002<br>\u5c24\u5176\u8981\u6293\u4f4f\u8fd9\u4e24\u4e2a\u9ad8\u9891\u7ed3\u8bba\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>DHCP Discover\uff1a<code>0.0.0.0 -> 255.255.255.255<\/code><\/li>\n\n\n\n<li>\u8de8\u7f51\u6bb5\u53d1\u5305\u65f6\uff0c\u4e8c\u5c42\u76ee\u7684 MAC \u6c38\u8fdc\u5148\u5199\u9ed8\u8ba4\u7f51\u5173\u7684 MAC<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-large\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/www.preluna.xyz\/wp-content\/uploads\/2026\/04\/15-768x1024.jpg'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"768\" height=\"1024\" data-original=\"http:\/\/www.preluna.xyz\/wp-content\/uploads\/2026\/04\/15-768x1024.jpg\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-1972\"  sizes=\"auto, (max-width: 768px) 100vw, 768px\" \/><\/div><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/www.preluna.xyz\/wp-content\/uploads\/2026\/04\/16-768x1024.jpg'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"768\" height=\"1024\" data-original=\"http:\/\/www.preluna.xyz\/wp-content\/uploads\/2026\/04\/16-768x1024.jpg\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-1974\"  sizes=\"auto, (max-width: 768px) 100vw, 768px\" \/><\/div><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">\u7b2c15\u9898\u89e3\u6790<\/h2>\n\n\n\n<p>\u8fd9\u9053\u9898\u662f\u5f88\u5178\u578b\u7684\u201c\u5b50\u7f51\u5212\u5206 + \u53ef\u5206\u914d\u4e3b\u673a\u6570 + IP \u5206\u7247\u201d\u7efc\u5408\u9898\u3002\u5148\u628a\u7ed3\u8bba\u76f4\u63a5\u7ed9\u51fa\u6765\uff1a<\/p>\n\n\n\n<p>\u7b2c1\u95ee\u7b54\u6848\u662f\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u9500\u552e\u90e8\u5b50\u7f51\u7684\u5e7f\u64ad\u5730\u5740\uff1a<code>192.168.1.127<\/code><\/li>\n\n\n\n<li>\u6280\u672f\u90e8\u5b50\u7f51\u7684\u5b50\u7f51\u5730\u5740\uff1a<code>192.168.1.128<\/code><\/li>\n\n\n\n<li>\u6280\u672f\u90e8\u5b50\u7f51\u8fd8\u53ef\u4ee5\u8fde\u63a5\u7684\u4e3b\u673a\u6570\uff1a<code>45 \u53f0<\/code><\/li>\n<\/ul>\n\n\n\n<p>\u7b2c2\u95ee\u7b54\u6848\u662f\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u4e00\u4e2a\u201c\u6700\u5927 IP \u5206\u7247\u201d\u6240\u5c01\u88c5\u7684\u6570\u636e\u5b57\u8282\u6570\uff1a<code>776B<\/code><\/li>\n\n\n\n<li>\u81f3\u5c11\u9700\u8981\u5206\u6210\uff1a<code>2 \u4e2a\u5206\u7247<\/code><\/li>\n\n\n\n<li>\u5404\u5206\u7247\u7247\u504f\u79fb\u91cf\u5206\u522b\u4e3a\uff1a<code>0<\/code>\u3001<code>97<\/code><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b2c15\u9898\u7b2c1\u95ee\u600e\u4e48\u505a<\/h3>\n\n\n\n<p>\u9898\u5e72\u8bf4 <code>192.168.1.0\/24<\/code> \u201c\u5747\u5206\u201d\u7ed9\u4e24\u4e2a\u5b50\u7f51\uff0c\u6240\u4ee5\u5f88\u660e\u663e\u5c31\u662f\u628a\u4e00\u4e2a <code>\/24<\/code> \u5212\u6210\u4e24\u4e2a <code>\/25<\/code>\u3002<\/p>\n\n\n\n<p><code>\/24<\/code> \u4e00\u5171 256 \u4e2a\u5730\u5740\uff0c\u5747\u5206\u540e\u6bcf\u4e2a\u5b50\u7f51 128 \u4e2a\u5730\u5740\uff0c\u56e0\u6b64\u4e24\u4e2a\u5b50\u7f51\u5206\u522b\u662f\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>192.168.1.0\/25<\/code><\/li>\n\n\n\n<li><code>192.168.1.128\/25<\/code><\/li>\n<\/ul>\n\n\n\n<p>\u518d\u7ed3\u5408\u56fe\u4e2d\u7684\u8def\u7531\u5668\u63a5\u53e3\u5730\u5740\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u9500\u552e\u90e8\u8def\u7531\u5668\u63a5\u53e3\u662f <code>192.168.1.126<\/code><\/li>\n\n\n\n<li>\u6280\u672f\u90e8\u8def\u7531\u5668\u63a5\u53e3\u662f <code>192.168.1.254<\/code><\/li>\n<\/ul>\n\n\n\n<p>\u53ef\u4ee5\u53cd\u8fc7\u6765\u9a8c\u8bc1\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u9500\u552e\u90e8\u5b50\u7f51\u5e94\u5f53\u662f <code>192.168.1.0\/25<\/code><\/li>\n\n\n\n<li>\u6280\u672f\u90e8\u5b50\u7f51\u5e94\u5f53\u662f <code>192.168.1.128\/25<\/code><\/li>\n<\/ul>\n\n\n\n<p>\u4e8e\u662f\uff1a<\/p>\n\n\n\n<p>\u9500\u552e\u90e8\u5b50\u7f51 <code>192.168.1.0\/25<\/code> \u7684\u5730\u5740\u8303\u56f4\u662f\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5b50\u7f51\u5730\u5740\uff1a<code>192.168.1.0<\/code><\/li>\n\n\n\n<li>\u53ef\u7528\u4e3b\u673a\u5730\u5740\uff1a<code>192.168.1.1 ~ 192.168.1.126<\/code><\/li>\n\n\n\n<li>\u5e7f\u64ad\u5730\u5740\uff1a<code>192.168.1.127<\/code><\/li>\n<\/ul>\n\n\n\n<p>\u6240\u4ee5\u9500\u552e\u90e8\u5b50\u7f51\u5e7f\u64ad\u5730\u5740\u5c31\u662f <code>192.168.1.127<\/code>\u3002<\/p>\n\n\n\n<p>\u6280\u672f\u90e8\u5b50\u7f51 <code>192.168.1.128\/25<\/code> \u7684\u5730\u5740\u8303\u56f4\u662f\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5b50\u7f51\u5730\u5740\uff1a<code>192.168.1.128<\/code><\/li>\n\n\n\n<li>\u53ef\u7528\u4e3b\u673a\u5730\u5740\uff1a<code>192.168.1.129 ~ 192.168.1.254<\/code><\/li>\n\n\n\n<li>\u5e7f\u64ad\u5730\u5740\uff1a<code>192.168.1.255<\/code><\/li>\n<\/ul>\n\n\n\n<p>\u6240\u4ee5\u6280\u672f\u90e8\u5b50\u7f51\u5730\u5740\u5c31\u662f <code>192.168.1.128<\/code>\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u6280\u672f\u90e8\u8fd8\u53ef\u4ee5\u8fde\u63a5\u591a\u5c11\u53f0\u4e3b\u673a<\/h3>\n\n\n\n<p>\u6280\u672f\u90e8\u8fd9\u4e2a <code>\/25<\/code> \u5b50\u7f51\uff0c\u53ef\u7528\u4e3b\u673a\u5730\u5740\u603b\u6570\u4e3a\uff1a<\/p>\n\n\n\n<p><code>2^(32-25) - 2 = 2^7 - 2 = 126<\/code><\/p>\n\n\n\n<p>\u4e5f\u5c31\u662f\u4e00\u5171\u53ef\u4ee5\u7ed9 126 \u4e2a\u7f51\u7edc\u63a5\u53e3\u5206\u914d\u5730\u5740\u3002<\/p>\n\n\n\n<p>\u56fe\u4e2d\u5df2\u7ecf\u5360\u7528\u7684\u5730\u5740\u6709\u4e24\u7c7b\uff1a<\/p>\n\n\n\n<p>\u4e00\u7c7b\u662f\u6280\u672f\u90e8\u5df2\u7ecf\u5206\u914d\u7ed9\u4e3b\u673a\u7684\u5730\u5740\uff1a<code>192.168.1.129 ~ 192.168.1.208<\/code><\/p>\n\n\n\n<p>\u8fd9\u4e00\u6bb5\u5171\u6709\uff1a<\/p>\n\n\n\n<p><code>208 - 129 + 1 = 80<\/code><\/p>\n\n\n\n<p>\u53e6\u4e00\u7c7b\u662f\u8def\u7531\u5668\u63a5\u53e3 <code>192.168.1.254<\/code>\uff0c\u5b83\u4e5f\u5360\u7528\u4e86\u4e00\u4e2a\u53ef\u7528\u4e3b\u673a\u5730\u5740\u3002<\/p>\n\n\n\n<p>\u56e0\u6b64\u8fd8\u80fd\u518d\u63a5\u5165\u7684\u4e3b\u673a\u6570\u662f\uff1a<\/p>\n\n\n\n<p><code>126 - 80 - 1 = 45<\/code><\/p>\n\n\n\n<p>\u6240\u4ee5\u7b54\u6848\u662f <code>45 \u53f0<\/code>\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u8fd9\u4e00\u95ee\u4e3a\u4ec0\u4e48\u5bb9\u6613\u9519<\/h3>\n\n\n\n<p>\u6700\u5bb9\u6613\u9519\u5728\u6700\u540e\u4e00\u6b65\u3002<\/p>\n\n\n\n<p>\u5f88\u591a\u4eba\u4f1a\u76f4\u63a5\u7528 <code>126 - 80 = 46<\/code>\uff0c\u4f46\u8fd9\u662f\u628a\u8def\u7531\u5668\u63a5\u53e3\u5730\u5740\u6f0f\u6389\u4e86\u3002\u8def\u7531\u5668\u63a5\u53e3\u867d\u7136\u4e0d\u662f\u201c\u7ec8\u7aef\u4e3b\u673a\u201d\uff0c\u4f46\u5b83\u786e\u5b9e\u5360\u7528\u4e86\u6280\u672f\u90e8\u5b50\u7f51\u4e2d\u7684\u4e00\u4e2a\u53ef\u7528\u5730\u5740\uff0c\u6240\u4ee5\u4e0d\u80fd\u518d\u5206\u7ed9\u666e\u901a\u4e3b\u673a\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b2c15\u9898\u7b2c2\u95ee\u600e\u4e48\u505a<\/h3>\n\n\n\n<p>\u5df2\u77e5\u4e3b\u673a\u53d1\u9001\u7684 IP \u5206\u7ec4\u603b\u957f\u5ea6\u662f <code>1500B<\/code>\uff0c\u9996\u90e8\u957f\u5ea6\u662f <code>20B<\/code>\uff0c\u6240\u4ee5\u539f\u59cb\u6570\u636e\u90e8\u5206\u957f\u5ea6\u4e3a\uff1a<\/p>\n\n\n\n<p><code>1500 - 20 = 1480B<\/code><\/p>\n\n\n\n<p>\u8fd9\u4e2a\u5206\u7ec4\u7ecf\u8fc7\u8def\u7531\u5668\uff0c\u4ece F1 \u63a5\u53e3\u8f6c\u53d1\u65f6\u8981\u5206\u7247\uff0c\u800c F1 \u7684 MTU \u662f <code>800B<\/code>\u3002<\/p>\n\n\n\n<p>\u6ce8\u610f\uff0cMTU \u6307\u7684\u662f\u94fe\u8def\u5c42\u4e00\u6b21\u80fd\u591f\u627f\u8f7d\u7684 IP \u6570\u636e\u62a5\u6700\u5927\u957f\u5ea6\uff0c\u56e0\u6b64\u6bcf\u4e2a\u5206\u7247\u7684\u201c\u603b\u957f\u5ea6\u201d\u90fd\u4e0d\u80fd\u8d85\u8fc7 <code>800B<\/code>\u3002<\/p>\n\n\n\n<p>\u6bcf\u4e2a\u5206\u7247\u4e5f\u8981\u5e26\u4e00\u4e2a IP \u9996\u90e8 <code>20B<\/code>\uff0c\u56e0\u6b64\u6bcf\u4e2a\u5206\u7247\u6700\u591a\u80fd\u88c5\u7684\u6570\u636e\u4e3a\uff1a<\/p>\n\n\n\n<p><code>800 - 20 = 780B<\/code><\/p>\n\n\n\n<p>\u4f46\u662f\u8fd9\u91cc\u8fd8\u4e0d\u80fd\u76f4\u63a5\u5199 780\uff0c\u56e0\u4e3a IP \u5206\u7247\u7684\u201c\u7247\u504f\u79fb\u201d\u5355\u4f4d\u662f 8 \u5b57\u8282\uff0c\u6240\u4ee5\u9664\u4e86\u6700\u540e\u4e00\u4e2a\u5206\u7247\u5916\uff0c\u6bcf\u4e2a\u5206\u7247\u7684\u6570\u636e\u957f\u5ea6\u5fc5\u987b\u662f 8 \u7684\u6574\u6570\u500d\u3002<\/p>\n\n\n\n<p>\u6240\u4ee5\u6700\u5927\u53ef\u53d6\uff1a<\/p>\n\n\n\n<p><code>floor(780 \/ 8) \u00d7 8 = 97 \u00d7 8 = 776B<\/code><\/p>\n\n\n\n<p>\u6240\u4ee5\u4e00\u4e2a\u6700\u5927 IP \u5206\u7247\u6240\u5c01\u88c5\u7684\u6570\u636e\u5b57\u8282\u6570\u662f <code>776B<\/code>\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u81f3\u5c11\u5206\u6210\u51e0\u4e2a\u5206\u7247<\/h3>\n\n\n\n<p>\u603b\u6570\u636e\u662f <code>1480B<\/code>\uff0c\u82e5\u6bcf\u4e2a\u6700\u5927\u5206\u7247\u88c5 <code>776B<\/code>\uff0c\u5219\u5269\u4f59\u6570\u636e\u662f\uff1a<\/p>\n\n\n\n<p><code>1480 - 776 = 704B<\/code><\/p>\n\n\n\n<p>704 \u4e5f\u6b63\u597d\u662f 8 \u7684\u6574\u6570\u500d\uff0c\u56e0\u6b64\u53ef\u4ee5\u5206\u6210\u4e24\u7247\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u7b2c1\u7247\u6570\u636e\uff1a<code>776B<\/code><\/li>\n\n\n\n<li>\u7b2c2\u7247\u6570\u636e\uff1a<code>704B<\/code><\/li>\n<\/ul>\n\n\n\n<p>\u6240\u4ee5\u81f3\u5c11\u9700\u8981 <code>2 \u4e2a\u5206\u7247<\/code>\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u7247\u504f\u79fb\u91cf\u600e\u4e48\u7b97<\/h3>\n\n\n\n<p>\u7247\u504f\u79fb\u91cf\u7684\u5355\u4f4d\u662f <code>8B<\/code>\u3002<\/p>\n\n\n\n<p>\u7b2c1\u4e2a\u5206\u7247\u662f\u7b2c\u4e00\u4e2a\uff0c\u6240\u4ee5\u7247\u504f\u79fb\u91cf\u4e3a\uff1a<\/p>\n\n\n\n<p><code>0<\/code><\/p>\n\n\n\n<p>\u7b2c2\u4e2a\u5206\u7247\u4ece\u539f\u6570\u636e\u7684\u7b2c <code>776B<\/code> \u5904\u5f00\u59cb\uff0c\u56e0\u6b64\u7247\u504f\u79fb\u91cf\u4e3a\uff1a<\/p>\n\n\n\n<p><code>776 \/ 8 = 97<\/code><\/p>\n\n\n\n<p>\u6240\u4ee5\u4e24\u4e2a\u5206\u7247\u7684\u7247\u504f\u79fb\u91cf\u5206\u522b\u662f\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u7b2c1\u7247\uff1a<code>0<\/code><\/li>\n\n\n\n<li>\u7b2c2\u7247\uff1a<code>97<\/code><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u8fd9\u4e00\u95ee\u7684\u5b8c\u6574\u7ed3\u679c<\/h3>\n\n\n\n<p>\u8fd8\u53ef\u4ee5\u628a\u6bcf\u4e2a\u5206\u7247\u7684\u603b\u957f\u5ea6\u987a\u624b\u5199\u51fa\u6765\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u7b2c1\u7247\u603b\u957f\u5ea6\uff1a<code>20 + 776 = 796B<\/code><\/li>\n\n\n\n<li>\u7b2c2\u7247\u603b\u957f\u5ea6\uff1a<code>20 + 704 = 724B<\/code><\/li>\n<\/ul>\n\n\n\n<p>\u90fd\u4e0d\u8d85\u8fc7 MTU 800B\uff0c\u6210\u7acb\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u8fd9\u4e00\u95ee\u4e3a\u4ec0\u4e48\u5bb9\u6613\u9519<\/h3>\n\n\n\n<p>\u672c\u9898\u6700\u5e38\u89c1\u7684\u9519\u8bef\u6709\u4e24\u4e2a\u3002<\/p>\n\n\n\n<p>\u7b2c\u4e00\u4e2a\u9519\u8bef\u662f\u628a\u6700\u5927\u6570\u636e\u90e8\u5206\u76f4\u63a5\u5199\u6210 <code>780B<\/code>\u3002\u8fd9\u4e2a\u9519\u6cd5\u6ca1\u6709\u8003\u8651\u201c\u9664\u6700\u540e\u4e00\u7247\u5916\uff0c\u6570\u636e\u957f\u5ea6\u5fc5\u987b\u662f 8B \u7684\u6574\u6570\u500d\u201d\u3002<\/p>\n\n\n\n<p>\u7b2c\u4e8c\u4e2a\u9519\u8bef\u662f\u7247\u504f\u79fb\u91cf\u76f4\u63a5\u5199\u6210\u5b57\u8282\u6570 <code>776<\/code>\u3002\u7247\u504f\u79fb\u91cf\u4e0d\u662f\u6309\u5b57\u8282\u586b\uff0c\u800c\u662f\u6309 <code>8B<\/code> \u4e3a\u5355\u4f4d\u586b\u5199\uff0c\u6240\u4ee5\u5e94\u8be5\u662f <code>97<\/code>\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u8fd9\u7c7b\u9898\u7684\u5feb\u901f\u8bc6\u522b\u65b9\u6cd5<\/h3>\n\n\n\n<p>\u51e1\u662f\u770b\u5230\u201c\u8def\u7531\u5668\u8f6c\u53d1\u65f6\u5206\u7247\u201d\u201cMTU\u201d\u201cIP\u9996\u90e8\u957f\u5ea6\u201d\u201c\u7247\u504f\u79fb\u201d\uff0c\u7acb\u523b\u6309\u8fd9\u4e2a\u987a\u5e8f\u505a\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u5148\u6c42\u539f\u59cb\u6570\u636e\u957f\u5ea6\uff1a<code>\u603b\u957f\u5ea6 - \u9996\u90e8\u957f\u5ea6<\/code><\/li>\n\n\n\n<li>\u518d\u6c42\u6bcf\u7247\u6700\u591a\u53ef\u88c5\u6570\u636e\uff1a<code>MTU - \u9996\u90e8\u957f\u5ea6<\/code><\/li>\n\n\n\n<li>\u518d\u628a\u5b83\u5411\u4e0b\u8c03\u6574\u6210 8 \u7684\u6574\u6570\u500d<\/li>\n\n\n\n<li>\u6700\u540e\u7528\u201c\u524d\u9762\u5df2\u7ecf\u88c5\u4e86\u591a\u5c11\u5b57\u8282 \u00f7 8\u201d\u6c42\u7247\u504f\u79fb<\/li>\n<\/ol>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u7b2c16\u9898\u89e3\u6790<\/h2>\n\n\n\n<p>\u8fd9\u9053\u9898\u662f NAT \u7684\u7ecf\u5178\u9898\uff0c\u800c\u4e14\u6545\u610f\u628a\u4e24\u4e2a\u5c40\u57df\u7f51\u90fd\u5199\u6210\u4e86 <code>192.168.1.x<\/code>\uff0c\u8ff7\u60d1\u6027\u5f88\u5f3a\u3002\u5148\u76f4\u63a5\u7ed9\u7ed3\u8bba\u3002<\/p>\n\n\n\n<p>\u7b2c1\u95ee\u9700\u8981\u7684\u914d\u7f6e\u662f\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Web \u670d\u52a1\u5668\u5bf9\u5916\u53d1\u5e03\u65f6\uff0c\u5e94\u628a R2 \u7684\u5916\u7f51\u5730\u5740 <code>203.10.2.2<\/code> \u4f5c\u4e3a\u8bbf\u95ee\u5730\u5740<\/li>\n\n\n\n<li>\u5728 R2 \u4e0a\u914d\u7f6e\u9759\u6001 NAT \/ \u7aef\u53e3\u6620\u5c04\uff1a<code>203.10.2.2:80 \u2192 192.168.1.2:80<\/code><\/li>\n\n\n\n<li>\u5728 R3 \u4e0a\u914d\u7f6e\u6e90 NAT \/ PAT\uff0c\u4f7f H2\u3001H3 \u8bbf\u95ee\u5916\u90e8\u65f6\uff0c\u5176\u6e90\u5730\u5740\u8f6c\u6362\u4e3a <code>203.10.2.6<\/code><\/li>\n\n\n\n<li>H2\u3001H3 \u7684\u9ed8\u8ba4\u7f51\u5173\u5e94\u914d\u7f6e\u4e3a R3 \u7684\u5185\u7f51\u63a5\u53e3 <code>192.168.1.1<\/code><\/li>\n\n\n\n<li>Web \u670d\u52a1\u5668\u7684\u9ed8\u8ba4\u7f51\u5173\u5e94\u914d\u7f6e\u4e3a R2 \u7684\u5185\u7f51\u63a5\u53e3 <code>192.168.1.1<\/code><\/li>\n<\/ul>\n\n\n\n<p>\u7b2c2\u95ee\u7b54\u6848\u662f\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>H2 \u53d1\u51fa P \u65f6\uff1a\n<ul class=\"wp-block-list\">\n<li>\u6e90 IP\uff1a<code>192.168.1.2<\/code><\/li>\n\n\n\n<li>\u76ee\u7684 IP\uff1a<code>203.10.2.2<\/code><\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>\u7ecf\u8fc7 R3 \u8f6c\u53d1\u540e\uff1a\n<ul class=\"wp-block-list\">\n<li>\u6e90 IP\uff1a<code>203.10.2.6<\/code><\/li>\n\n\n\n<li>\u76ee\u7684 IP\uff1a<code>203.10.2.2<\/code><\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>\u7ecf\u8fc7 R2 \u8f6c\u53d1\u540e\uff1a\n<ul class=\"wp-block-list\">\n<li>\u6e90 IP\uff1a<code>203.10.2.6<\/code><\/li>\n\n\n\n<li>\u76ee\u7684 IP\uff1a<code>192.168.1.2<\/code><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b2c16\u9898\u5148\u770b\u672c\u9898\u8003\u4ec0\u4e48<\/h3>\n\n\n\n<p>\u672c\u9898\u8003\u7684\u662f\u4e09\u4ef6\u4e8b\u4e32\u8d77\u6765\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u79c1\u6709\u5730\u5740\u4e0d\u80fd\u76f4\u63a5\u4f5c\u4e3a\u8de8\u7f51\u8bbf\u95ee\u6807\u8bc6<\/li>\n\n\n\n<li>Web \u670d\u52a1\u5668\u5bf9\u5916\u53d1\u5e03\u65f6\u8981\u505a\u9759\u6001 NAT \/ \u7aef\u53e3\u6620\u5c04<\/li>\n\n\n\n<li>\u5185\u7f51\u4e3b\u673a\u8bbf\u95ee\u5916\u90e8\u65f6\u8981\u505a\u6e90 NAT \/ PAT<\/li>\n<\/ol>\n\n\n\n<p>\u800c\u4e14\u8fd9\u9898\u6700\u5173\u952e\u7684\u9677\u9631\u5728\u4e8e\uff1a\u5de6\u53f3\u4e24\u4e2a\u5c40\u57df\u7f51\u90fd\u7528\u4e86 <code>192.168.1.0\/24<\/code> \u8fd9\u4e00\u7c7b\u79c1\u7f51\u5730\u5740\uff0c\u6240\u4ee5\u5982\u679c\u4e0d\u501f\u52a9 NAT\uff0c\u5355\u9760\u666e\u901a\u8def\u7531\u662f\u6ca1\u6cd5\u6b63\u786e\u4e92\u8bbf\u7684\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b2c16\u9898\u7b2c1\u95ee\u600e\u4e48\u505a<\/h3>\n\n\n\n<p>\u5148\u770b\u5de6\u8fb9\u5c40\u57df\u7f51\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>R2 \u5185\u7f51\u53e3\uff1a<code>192.168.1.1<\/code><\/li>\n\n\n\n<li>Web \u670d\u52a1\u5668\uff1a<code>192.168.1.2<\/code><\/li>\n\n\n\n<li>H1\uff1a<code>192.168.1.3<\/code><\/li>\n<\/ul>\n\n\n\n<p>\u518d\u770b\u53f3\u8fb9\u5c40\u57df\u7f51\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>R3 \u5185\u7f51\u53e3\uff1a<code>192.168.1.1<\/code><\/li>\n\n\n\n<li>H2\uff1a<code>192.168.1.2<\/code><\/li>\n\n\n\n<li>H3\uff1a<code>192.168.1.3<\/code><\/li>\n<\/ul>\n\n\n\n<p>\u8fd9\u8bf4\u660e\u4e24\u4e2a\u5185\u7f51\u5730\u5740\u662f\u91cd\u590d\u7684\u3002\u4e8e\u662f H2 \u5982\u679c\u60f3\u8bbf\u95ee Web \u670d\u52a1\u5668\uff0c\u4e0d\u80fd\u628a\u670d\u52a1\u5668\u76ee\u7684\u5730\u5740\u76f4\u63a5\u5199\u6210 <code>192.168.1.2<\/code>\uff0c\u56e0\u4e3a\u5bf9\u4e8e H2 \u6240\u5728\u5c40\u57df\u7f51\u6765\u8bf4\uff0c<code>192.168.1.2<\/code> \u5c31\u662f\u5b83\u81ea\u5df1\u3002<\/p>\n\n\n\n<p>\u6240\u4ee5\u5fc5\u987b\u8ba9 Web \u670d\u52a1\u5668\u4ee5 R2 \u7684\u516c\u7f51\u5730\u5740\u5bf9\u5916\u63d0\u4f9b\u670d\u52a1\uff0c\u4e5f\u5c31\u662f\uff1a<\/p>\n\n\n\n<p><code>203.10.2.2:80<\/code><\/p>\n\n\n\n<p>\u4e8e\u662f R2 \u4e0a\u8981\u505a\u9759\u6001\u6620\u5c04\uff1a<\/p>\n\n\n\n<p><code>203.10.2.2:80 \u2194 192.168.1.2:80<\/code><\/p>\n\n\n\n<p>\u8fd9\u6837\uff0c\u5916\u90e8\u4e3b\u673a\u8bbf\u95ee <code>203.10.2.2<\/code> \u7684 80 \u7aef\u53e3\u65f6\uff0cR2 \u624d\u80fd\u628a\u62a5\u6587\u8f6c\u7ed9\u5185\u7f51 Web \u670d\u52a1\u5668 <code>192.168.1.2:80<\/code>\u3002<\/p>\n\n\n\n<p>\u53e6\u4e00\u65b9\u9762\uff0cH2 \u548c H3 \u4e5f\u4e0d\u80fd\u76f4\u63a5\u5e26\u7740\u79c1\u7f51\u5730\u5740 <code>192.168.1.2<\/code>\u3001<code>192.168.1.3<\/code> \u51fa\u53bb\u8bbf\u95ee\uff0c\u56e0\u4e3a\u8fd4\u56de\u65f6\u4f1a\u53d1\u751f\u5730\u5740\u6b67\u4e49\uff0c\u6240\u4ee5 R3 \u8fd8\u8981\u7ed9\u5b83\u4eec\u505a\u6e90 NAT \/ PAT\uff0c\u628a\u5b83\u4eec\u7edf\u4e00\u8f6c\u6362\u6210 R3 \u7684\u516c\u7f51\u5730\u5740 <code>203.10.2.6<\/code>\uff0c\u518d\u7528\u4e0d\u540c\u7aef\u53e3\u533a\u5206\u8fde\u63a5\u3002<\/p>\n\n\n\n<p>\u56e0\u6b64\u7b2c1\u95ee\u9700\u8981\u7684\u6838\u5fc3\u914d\u7f6e\u5c31\u662f\uff1a<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">1. \u5728 R2 \u4e0a\u914d\u7f6e Web \u670d\u52a1\u5668\u7684\u9759\u6001 NAT<\/h4>\n\n\n\n<p><code>203.10.2.2:80 \u2192 192.168.1.2:80<\/code><\/p>\n\n\n\n<h4 class=\"wp-block-heading\">2. \u5728 R3 \u4e0a\u914d\u7f6e H2\u3001H3 \u51fa\u7f51\u65f6\u7684\u6e90 NAT \/ PAT<\/h4>\n\n\n\n<p>\u628a\u5185\u7f51\u4e3b\u673a\u8bbf\u95ee\u5916\u90e8\u65f6\u7684\u6e90\u5730\u5740\u6539\u6210 <code>203.10.2.6<\/code>\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">3. \u914d\u7f6e\u9ed8\u8ba4\u7f51\u5173<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Web \u670d\u52a1\u5668\u9ed8\u8ba4\u7f51\u5173\uff1a<code>192.168.1.1<\/code>\uff08R2 \u5185\u7f51\u53e3\uff09<\/li>\n\n\n\n<li>H2\u3001H3 \u9ed8\u8ba4\u7f51\u5173\uff1a<code>192.168.1.1<\/code>\uff08R3 \u5185\u7f51\u53e3\uff09<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\">4. H2\u3001H3 \u8bbf\u95ee\u670d\u52a1\u5668\u65f6\uff0c\u5e94\u8bbf\u95ee\u7684\u4e0d\u662f 192.168.1.2\uff0c\u800c\u662f 203.10.2.2<\/h4>\n\n\n\n<p>\u8fd9\u4e00\u6b65\u7279\u522b\u5173\u952e\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b2c16\u9898\u7b2c2\u95ee\u600e\u4e48\u505a<\/h3>\n\n\n\n<p>\u9898\u76ee\u95ee\u7684\u662f\u201cHTTP \u8bf7\u6c42\u62a5\u6587\u5c01\u88c5\u6210 IP \u6570\u636e\u62a5 P \u540e\u201d\uff0c\u5728\u4e0d\u540c\u9636\u6bb5\uff0cP \u7684\u6e90 IP \u548c\u76ee\u7684 IP \u5206\u522b\u662f\u4ec0\u4e48\u3002<\/p>\n\n\n\n<p>\u8fd9\u91cc\u8981\u6293\u4f4f\u4e00\u4e2a\u4e3b\u7ebf\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u7ecf\u8fc7 R3 \u65f6\uff0c\u505a\u7684\u662f\u201c\u6e90\u5730\u5740\u8f6c\u6362\u201d<\/li>\n\n\n\n<li>\u7ecf\u8fc7 R2 \u65f6\uff0c\u505a\u7684\u662f\u201c\u76ee\u7684\u5730\u5740\u8f6c\u6362\u201d<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b2c\u4e00\u6b65\uff1aH2 \u521a\u53d1\u9001 P \u65f6<\/h3>\n\n\n\n<p>H2 \u81ea\u5df1\u7684\u5730\u5740\u662f <code>192.168.1.2<\/code>\u3002<\/p>\n\n\n\n<p>\u56e0\u4e3a\u5b83\u8bbf\u95ee\u7684\u662f Web \u670d\u52a1\u5668\u5bf9\u5916\u516c\u5e03\u7684\u5730\u5740\uff0c\u6240\u4ee5\u76ee\u7684\u5730\u5740\u5e94\u5f53\u662f R2 \u7684\u516c\u7f51\u5730\u5740 <code>203.10.2.2<\/code>\u3002<\/p>\n\n\n\n<p>\u56e0\u6b64 H2 \u53d1\u51fa P \u65f6\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u6e90 IP\uff1a<code>192.168.1.2<\/code><\/li>\n\n\n\n<li>\u76ee\u7684 IP\uff1a<code>203.10.2.2<\/code><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b2c\u4e8c\u6b65\uff1a\u7ecf\u8fc7 R3 \u8f6c\u53d1\u540e<\/h3>\n\n\n\n<p>R3 \u8981\u628a H2 \u7684\u79c1\u7f51\u6e90\u5730\u5740\u8f6c\u6362\u6210\u81ea\u5df1\u7684\u516c\u7f51\u5730\u5740\uff0c\u5426\u5219\u62a5\u6587\u6ca1\u6cd5\u6b63\u786e\u8de8\u7f51\u8fd4\u56de\u3002<\/p>\n\n\n\n<p>\u6240\u4ee5\u7ecf\u8fc7 R3 \u540e\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u6e90 IP\uff1a<code>203.10.2.6<\/code><\/li>\n\n\n\n<li>\u76ee\u7684 IP\uff1a<code>203.10.2.2<\/code><\/li>\n<\/ul>\n\n\n\n<p>\u76ee\u7684\u5730\u5740\u6b64\u65f6\u8fd8\u4e0d\u53d8\uff0c\u56e0\u4e3a\u8fd8\u6ca1\u5230 R2 \u53bb\u505a\u670d\u52a1\u5668\u6620\u5c04\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b2c\u4e09\u6b65\uff1a\u7ecf\u8fc7 R2 \u8f6c\u53d1\u540e<\/h3>\n\n\n\n<p>R2 \u6536\u5230\u7684\u76ee\u7684\u5730\u5740\u662f <code>203.10.2.2<\/code>\uff0c\u5b83\u67e5\u9759\u6001 NAT \u8868\uff0c\u77e5\u9053\u8fd9\u4e2a\u5730\u5740\u7684 80 \u7aef\u53e3\u5bf9\u5e94\u7684\u662f\u5185\u7f51 Web \u670d\u52a1\u5668 <code>192.168.1.2:80<\/code>\u3002<\/p>\n\n\n\n<p>\u56e0\u6b64 R2 \u4f1a\u628a\u76ee\u7684\u5730\u5740\u4ece <code>203.10.2.2<\/code> \u6539\u6210 <code>192.168.1.2<\/code>\uff0c\u518d\u8f6c\u53d1\u7ed9 Web \u670d\u52a1\u5668\u3002<\/p>\n\n\n\n<p>\u6240\u4ee5\u7ecf\u8fc7 R2 \u8f6c\u53d1\u540e\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u6e90 IP\uff1a<code>203.10.2.6<\/code><\/li>\n\n\n\n<li>\u76ee\u7684 IP\uff1a<code>192.168.1.2<\/code><\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b2c16\u9898\u4e3a\u4ec0\u4e48\u5bb9\u6613\u9519<\/h3>\n\n\n\n<p>\u8fd9\u9898\u6700\u5bb9\u6613\u9519\u7684\u5730\u65b9\u6709\u4e09\u4e2a\u3002<\/p>\n\n\n\n<p>\u7b2c\u4e00\u4e2a\u9519\u70b9\uff0c\u662f\u628a H2 \u8bbf\u95ee\u7684\u76ee\u6807\u5730\u5740\u5199\u6210 <code>192.168.1.2<\/code>\u3002\u8fd9\u4e2a\u5730\u5740\u5728 H2 \u6240\u5728\u5c40\u57df\u7f51\u91cc\u5176\u5b9e\u5c31\u662f\u672c\u5730\u79c1\u7f51\u5730\u5740\uff0c\u6839\u672c\u4e0d\u662f\u8fdc\u7aef Web \u670d\u52a1\u5668\u5bf9\u5916\u8bbf\u95ee\u65f6\u5e94\u4f7f\u7528\u7684\u5730\u5740\u3002<\/p>\n\n\n\n<p>\u7b2c\u4e8c\u4e2a\u9519\u70b9\uff0c\u662f\u53ea\u60f3\u5230 R2 \u8981\u505a\u9759\u6001 NAT\uff0c\u5374\u5fd8\u4e86 R3 \u4e5f\u5fc5\u987b\u505a\u6e90 NAT\u3002\u56e0\u4e3a H2\u3001H3 \u4e5f\u662f\u79c1\u7f51\u4e3b\u673a\uff0c\u4e0d\u8f6c\u6362\u6e90\u5730\u5740\u5c31\u4f1a\u9020\u6210\u8fd4\u56de\u8def\u5f84\u6df7\u4e71\u3002<\/p>\n\n\n\n<p>\u7b2c\u4e09\u4e2a\u9519\u70b9\uff0c\u662f\u628a\u201c\u7ecf\u8fc7 R2 \u8f6c\u53d1\u540e\u201d\u7684\u6e90\u5730\u5740\u4e5f\u6539\u6389\u3002\u5b9e\u9645\u4e0a R2 \u5728\u8fd9\u91cc\u4e3b\u8981\u662f\u505a\u76ee\u7684\u5730\u5740\u8f6c\u6362\uff0c\u628a <code>203.10.2.2<\/code> \u6539\u6210 <code>192.168.1.2<\/code>\uff1b\u6e90\u5730\u5740\u4ecd\u7136\u662f R3 \u8f6c\u6362\u540e\u7684 <code>203.10.2.6<\/code>\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u8fd9\u4e24\u9898\u80cc\u540e\u7684\u7edf\u4e00\u505a\u9898\u65b9\u6cd5<\/h2>\n\n\n\n<p>\u8fd9\u4e24\u9898\u867d\u7136\u4e00\u4e2a\u662f\u5206\u7247\uff0c\u4e00\u4e2a\u662f NAT\uff0c\u4f46\u90fd\u5f88\u7b26\u5408 408 \u7684\u547d\u9898\u98ce\u683c\uff1a\u9898\u76ee\u770b\u7740\u590d\u6742\uff0c\u771f\u6b63\u8981\u6293\u7684\u53ea\u6709\u201c\u5730\u5740\u8303\u56f4\u201d\u548c\u201c\u5b57\u6bb5\u53d8\u5316\u201d\u4e24\u6761\u7ebf\u3002<\/p>\n\n\n\n<p>\u505a\u5b50\u7f51\u9898\u65f6\uff0c\u6838\u5fc3\u662f\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5148\u770b\u524d\u7f00\u957f\u5ea6<\/li>\n\n\n\n<li>\u518d\u5b9a\u7f51\u7edc\u5730\u5740\u3001\u5e7f\u64ad\u5730\u5740\u3001\u53ef\u7528\u4e3b\u673a\u8303\u56f4<\/li>\n\n\n\n<li>\u6700\u540e\u6570\u5df2\u5360\u7528\u5730\u5740<\/li>\n<\/ul>\n\n\n\n<p>\u505a\u5206\u7247\u9898\u65f6\uff0c\u6838\u5fc3\u662f\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5148\u7b97\u539f\u59cb\u6570\u636e\u957f\u5ea6<\/li>\n\n\n\n<li>\u518d\u7b97\u6bcf\u7247\u6700\u5927\u6570\u636e\u957f\u5ea6<\/li>\n\n\n\n<li>\u6ce8\u610f 8B \u5bf9\u9f50<\/li>\n\n\n\n<li>\u518d\u7b97\u7247\u504f\u79fb<\/li>\n<\/ul>\n\n\n\n<p>\u505a NAT \u9898\u65f6\uff0c\u6838\u5fc3\u662f\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u770b\u8c01\u505a\u6e90\u5730\u5740\u8f6c\u6362<\/li>\n\n\n\n<li>\u770b\u8c01\u505a\u76ee\u7684\u5730\u5740\u8f6c\u6362<\/li>\n\n\n\n<li>\u660e\u786e\u201c\u4e3b\u673a\u5b9e\u9645\u53d1\u7ed9\u8c01\u201d<\/li>\n\n\n\n<li>\u5206\u9636\u6bb5\u8ddf\u8e2a IP \u5730\u5740\u600e\u4e48\u53d8<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-large\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/www.preluna.xyz\/wp-content\/uploads\/2026\/04\/17-1024x320.jpg'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"320\" data-original=\"http:\/\/www.preluna.xyz\/wp-content\/uploads\/2026\/04\/17-1024x320.jpg\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-1975\"  sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/div><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/www.preluna.xyz\/wp-content\/uploads\/2026\/04\/17-1-768x1024.jpg'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"768\" height=\"1024\" data-original=\"http:\/\/www.preluna.xyz\/wp-content\/uploads\/2026\/04\/17-1-768x1024.jpg\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-1976\"  sizes=\"auto, (max-width: 768px) 100vw, 768px\" \/><\/div><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">\u7b2c17\u9898\u89e3\u6790<\/h2>\n\n\n\n<p>\u8fd9\u9053\u9898\u628a\u51e0\u4e2a\u9ad8\u9891\u8003\u70b9\u4e32\u5728\u4e86\u4e00\u8d77\uff1a\u51b2\u7a81\u57df\/\u5e7f\u64ad\u57df\u3001\u4ea4\u6362\u673a\u4e0e\u96c6\u7ebf\u5668\u7684\u533a\u522b\u3001DHCP \u9996\u6b21\u62a5\u6587\u3001\u4ee5\u53ca 802.11 \u5e27\u5730\u5740\u5b57\u6bb5\u3002\u9898\u76ee\u4e0d\u96be\uff0c\u4f46\u5f88\u5bb9\u6613\u5728\u201c\u5e7f\u64ad\u5730\u5740\u201d\u548c\u201c802.11 \u5730\u57401\u5730\u57402\u5730\u57403\u201d\u8fd9\u91cc\u4e22\u5206\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b2c1\u95ee\uff1a\u8bbe\u59071\u548c\u8bbe\u59072\u5206\u522b\u662f\u4ec0\u4e48<\/h3>\n\n\n\n<p>\u5148\u770b\u9898\u5e72\u7ed9\u7684\u6761\u4ef6\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>H1 \u4e0e H2 \u5c5e\u4e8e\u540c\u4e00\u4e2a\u5e7f\u64ad\u57df\uff0c\u4f46\u4e0d\u5c5e\u4e8e\u540c\u4e00\u4e2a\u51b2\u7a81\u57df<\/li>\n\n\n\n<li>H2 \u548c H3 \u5c5e\u4e8e\u540c\u4e00\u4e2a\u51b2\u7a81\u57df<\/li>\n<\/ul>\n\n\n\n<p>\u5148\u6293\u6700\u5173\u952e\u7684\u5224\u65ad\u89c4\u5219\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u8def\u7531\u5668\uff1a\u9694\u79bb\u5e7f\u64ad\u57df\uff0c\u4e5f\u9694\u79bb\u51b2\u7a81\u57df<\/li>\n\n\n\n<li>\u4ea4\u6362\u673a\uff1a\u4e0d\u9694\u79bb\u5e7f\u64ad\u57df\uff0c\u4f46\u80fd\u9694\u79bb\u51b2\u7a81\u57df<\/li>\n\n\n\n<li>\u96c6\u7ebf\u5668 Hub\uff1a\u65e2\u4e0d\u9694\u79bb\u5e7f\u64ad\u57df\uff0c\u4e5f\u4e0d\u9694\u79bb\u51b2\u7a81\u57df<\/li>\n<\/ul>\n\n\n\n<p>\u4e8e\u662f\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>H2 \u548c H3 \u5c5e\u4e8e\u540c\u4e00\u4e2a\u51b2\u7a81\u57df\uff0c\u8bf4\u660e\u8fde\u63a5 H2\u3001H3 \u7684\u8bbe\u59072\u4e00\u5b9a\u662f <strong>Hub<\/strong><\/li>\n\n\n\n<li>H1 \u548c H2 \u5728\u540c\u4e00\u4e2a\u5e7f\u64ad\u57df\uff0c\u4f46\u4e0d\u5728\u540c\u4e00\u4e2a\u51b2\u7a81\u57df\uff0c\u8bf4\u660e\u4e0a\u5c42\u90a3\u4e2a\u8bbe\u59071\u4e00\u5b9a\u662f <strong>\u4ea4\u6362\u673a<\/strong><\/li>\n<\/ul>\n\n\n\n<p>\u6240\u4ee5\u7ed3\u8bba\u662f\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u8bbe\u59071\uff1a<strong>100Base-T \u4ee5\u592a\u7f51\u4ea4\u6362\u673a<\/strong><\/li>\n\n\n\n<li>\u8bbe\u59072\uff1a<strong>100Base-T \u96c6\u7ebf\u5668\uff08Hub\uff09<\/strong><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b2c2\u95ee\uff1aH2 \u4e0e H3 \u4e4b\u95f4\u6700\u8fdc\u53ef\u76f8\u8ddd\u591a\u5c11<\/h3>\n\n\n\n<p>\u8fd9\u95ee\u672c\u8d28\u8003\u7684\u662f <strong>CSMA\/CD \u7684\u6700\u5c0f\u5e27\u957f\u7ea6\u675f<\/strong>\u3002<\/p>\n\n\n\n<p>\u5728\u4ee5\u592a\u7f51\u4e2d\uff0c\u4e3a\u4e86\u80fd\u591f\u68c0\u6d4b\u51b2\u7a81\uff0c\u53d1\u9001\u7aef\u5728\u201c\u6700\u574f\u60c5\u51b5\u4e0b\u201d\u5fc5\u987b\u5728\u8fd8\u6ca1\u53d1\u5b8c\u6700\u5c0f\u5e27\u65f6\u5c31\u80fd\u611f\u77e5\u5230\u51b2\u7a81\uff0c\u4e5f\u5c31\u662f\uff1a<\/p>\n\n\n\n<p>\u5355\u7a0b\u4f20\u64ad\u65f6\u5ef6 \u00d7 2 + \u4e2d\u95f4\u8bbe\u5907\u989d\u5916\u65f6\u5ef6 \u00d7 2 \u2264 \u6700\u5c0f\u5e27\u53d1\u9001\u65f6\u5ef6<\/p>\n\n\n\n<p>\u5148\u7b97\u6700\u5c0f\u5e27\u53d1\u9001\u65f6\u5ef6\u3002<\/p>\n\n\n\n<p>\u4ee5\u592a\u7f51\u6700\u5c0f\u5e27\u957f\u662f 64B\uff0c\u4e5f\u5c31\u662f\uff1a<\/p>\n\n\n\n<p><code>64 \u00d7 8 = 512 bit<\/code><\/p>\n\n\n\n<p>100Base-T \u901f\u7387\u662f 100 Mb\/s\uff0c\u6240\u4ee5\u53d1\u9001\u6700\u5c0f\u5e27\u6240\u9700\u65f6\u95f4\u4e3a\uff1a<\/p>\n\n\n\n<p><code>512 \/ (100 \u00d7 10^6) = 5.12 \u03bcs<\/code><\/p>\n\n\n\n<p>\u8bbe H2 \u5230 H3 \u7684\u8ddd\u79bb\u4e3a d\uff0c\u4fe1\u53f7\u4f20\u64ad\u901f\u7387\u4e3a <code>2 \u00d7 10^8 m\/s<\/code>\uff0c\u5219\u5355\u7a0b\u7ebf\u8def\u4f20\u64ad\u65f6\u5ef6\u4e3a\uff1a<\/p>\n\n\n\n<p><code>d \/ (2 \u00d7 10^8)<\/code><\/p>\n\n\n\n<p>\u53c8\u56e0\u4e3a\u4fe1\u53f7\u7ecf\u8fc7\u8bbe\u59072\u65f6\u4f1a\u989d\u5916\u4ea7\u751f <code>1.5 \u03bcs<\/code> \u65f6\u5ef6\uff0c\u6240\u4ee5\u5355\u7a0b\u603b\u65f6\u5ef6\u4e3a\uff1a<\/p>\n\n\n\n<p><code>d \/ (2 \u00d7 10^8) + 1.5 \u03bcs<\/code><\/p>\n\n\n\n<p>\u5f80\u8fd4\u603b\u65f6\u5ef6\u5e94\u6ee1\u8db3\uff1a<\/p>\n\n\n\n<p><code>2 \u00d7 [ d \/ (2 \u00d7 10^8) + 1.5 \u03bcs ] \u2264 5.12 \u03bcs<\/code><\/p>\n\n\n\n<p>\u5316\u7b80\uff1a<\/p>\n\n\n\n<p><code>d \/ (2 \u00d7 10^8) + 1.5 \u03bcs \u2264 2.56 \u03bcs<\/code><\/p>\n\n\n\n<p><code>d \/ (2 \u00d7 10^8) \u2264 1.06 \u03bcs<\/code><\/p>\n\n\n\n<p><code>d \u2264 2 \u00d7 10^8 \u00d7 1.06 \u00d7 10^-6 = 212 m<\/code><\/p>\n\n\n\n<p>\u6240\u4ee5\u6700\u8fdc\u8ddd\u79bb\u662f\uff1a<\/p>\n\n\n\n<p><strong>212 m<\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b2c3\u95ee\uff1aH4 \u9996\u5148\u53d1\u9001\u7684 DHCP \u62a5\u6587 M \u662f\u4ec0\u4e48\uff1f\u8def\u7531\u5668 E0 \u80fd\u5426\u6536\u5230\uff1f\u4ea4\u6362\u673a\u8f6c\u53d1\u7ed9 DHCP \u670d\u52a1\u5668\u65f6\u7684\u76ee\u7684 MAC \u662f\u4ec0\u4e48\uff1f<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">\u7b2c\u4e00\u6b65\uff1a\u5148\u5224\u65ad M \u662f\u54ea\u79cd DHCP \u62a5\u6587<\/h4>\n\n\n\n<p>\u4e3b\u673a\u521a\u63a5\u5165\u7f51\u7edc\u3001\u8fd8\u6ca1\u6709 IP \u5730\u5740\u65f6\uff0cDHCP \u7684\u7b2c\u4e00\u6b65\u4e00\u5b9a\u662f\uff1a<\/p>\n\n\n\n<p><strong>DHCP Discover<\/strong><\/p>\n\n\n\n<p>\u6240\u4ee5 M \u662f\uff1a<\/p>\n\n\n\n<p><strong>DHCP Discover \u62a5\u6587<\/strong><\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u7b2c\u4e8c\u6b65\uff1a\u8def\u7531\u5668 E0 \u80fd\u4e0d\u80fd\u6536\u5230\u5c01\u88c5 M \u7684\u4ee5\u592a\u7f51\u5e27<\/h4>\n\n\n\n<p>DHCP Discover \u5728\u4e3b\u673a\u521a\u542f\u52a8\u65f6\uff0c\u6e90 IP \u662f <code>0.0.0.0<\/code>\uff0c\u76ee\u7684 IP \u662f <code>255.255.255.255<\/code>\uff0c\u94fe\u8def\u5c42\u76ee\u7684 MAC \u662f\u5e7f\u64ad\u5730\u5740\uff1a<\/p>\n\n\n\n<p><code>FF-FF-FF-FF-FF-FF<\/code><\/p>\n\n\n\n<p>\u800c\u9898\u76ee\u4e2d R \u7684 E0 \u63a5\u53e3\u3001\u4ea4\u6362\u673a S\u3001AP\u3001DHCP \u670d\u52a1\u5668\u3001H4\u3001H5 \u5904\u4e8e\u540c\u4e00\u4e2a\u5e7f\u64ad\u57df\u5185\uff0c\u6240\u4ee5\u8fd9\u4e2a\u5e7f\u64ad\u5e27\u4f1a\u5728\u8be5\u5e7f\u64ad\u57df\u5185\u88ab\u6cdb\u6d2a\uff0c\u8def\u7531\u5668\u7684 E0 \u63a5\u53e3\u5f53\u7136\u4e5f\u80fd\u6536\u5230\u8fd9\u4e2a\u5e27\u3002<\/p>\n\n\n\n<p>\u6240\u4ee5\u7b54\u6848\u662f\uff1a<\/p>\n\n\n\n<p><strong>\u80fd\u6536\u5230<\/strong><\/p>\n\n\n\n<p>\u4f46\u6ce8\u610f\u4e00\u4e2a\u5e38\u89c1\u8bef\u533a\uff1a<br>\u201c\u80fd\u6536\u5230\u201d\u548c\u201c\u4f1a\u8f6c\u53d1\u5230\u522b\u7684\u7f51\u6bb5\u201d\u4e0d\u662f\u4e00\u56de\u4e8b\u3002\u8def\u7531\u5668\u63a5\u53e3\u53ef\u4ee5\u6536\u5230\u672c\u5e7f\u64ad\u57df\u5185\u7684\u5e7f\u64ad\u5e27\uff0c\u4f46\u4e0d\u4f1a\u628a\u8fd9\u79cd\u4e8c\u5c42\u5e7f\u64ad\u7ee7\u7eed\u8f6c\u53d1\u5230\u522b\u7684\u5e7f\u64ad\u57df\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u7b2c\u4e09\u6b65\uff1aS \u5411 DHCP \u670d\u52a1\u5668\u8f6c\u53d1\u65f6\uff0c\u76ee\u7684 MAC \u662f\u4ec0\u4e48<\/h4>\n\n\n\n<p>\u56e0\u4e3a H4 \u53d1\u51fa\u7684 DHCP Discover \u672c\u8eab\u5c31\u662f <strong>\u4ee5\u592a\u7f51\u5e7f\u64ad\u5e27<\/strong>\uff0c\u4ea4\u6362\u673a\u53ea\u662f\u8f6c\u53d1\u8fd9\u4e2a\u5e7f\u64ad\u5e27\uff0c\u5e76\u4e0d\u4f1a\u628a\u76ee\u7684 MAC \u6539\u6210 DHCP \u670d\u52a1\u5668\u7684 MAC\u3002<\/p>\n\n\n\n<p>\u6240\u4ee5 S \u8f6c\u53d1\u7ed9 DHCP \u670d\u52a1\u5668\u65f6\uff0c\u8be5\u4ee5\u592a\u7f51\u5e27\u7684\u76ee\u7684 MAC \u4ecd\u7136\u662f\uff1a<\/p>\n\n\n\n<p><strong>FF-FF-FF-FF-FF-FF<\/strong><\/p>\n\n\n\n<p>\u8fd9\u4e00\u95ee\u7279\u522b\u5bb9\u6613\u9519\u6210 DHCP \u670d\u52a1\u5668\u7684 MAC \u5730\u5740 <code>00-11-11-11-11-B1<\/code>\uff0c\u8fd9\u662f\u5178\u578b\u9677\u9631\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b2c4\u95ee\uff1aH4 \u7ed9 H5 \u53d1\u9001 IP \u5206\u7ec4 P\uff0cH5 \u6536\u5230\u7684\u5c01\u88c5 P \u7684 802.11 \u5e27\u5730\u57401\u3001\u5730\u57402\u3001\u5730\u57403\u5206\u522b\u662f\u4ec0\u4e48<\/h3>\n\n\n\n<p>\u8fd9\u95ee\u8003\u7684\u662f <strong>802.11 \u57fa\u7840\u8bbe\u65bd\u6a21\u5f0f\u4e0b\u7684\u4e09\u5730\u5740\u5e27<\/strong>\u3002<\/p>\n\n\n\n<p>H4 \u548c H5 \u90fd\u662f\u901a\u8fc7 AP \u63a5\u5165\u7f51\u7edc\u3002\u73b0\u5728\u95ee\u7684\u662f\uff1a<\/p>\n\n\n\n<p><strong>H5 \u6536\u5230\u7684\u90a3\u4e00\u5e27 802.11 \u6570\u636e\u5e27<\/strong><\/p>\n\n\n\n<p>\u4e5f\u5c31\u662f AP \u8f6c\u53d1\u7ed9 H5 \u7684\u90a3\u4e00\u5e27\u3002<\/p>\n\n\n\n<p>\u5728 AP \u53d1\u5f80\u65e0\u7ebf\u7ad9\u70b9\u7684 802.11 \u6570\u636e\u5e27\u4e2d\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5730\u57401\uff1a\u63a5\u6536\u65b9\u5730\u5740\uff0c\u4e5f\u5c31\u662f\u6700\u7ec8\u63a5\u6536\u8be5\u65e0\u7ebf\u5e27\u7684\u4e3b\u673a MAC<\/li>\n\n\n\n<li>\u5730\u57402\uff1a\u53d1\u9001\u8be5\u65e0\u7ebf\u5e27\u7684 AP \u7684 MAC<\/li>\n\n\n\n<li>\u5730\u57403\uff1a\u539f\u59cb\u6e90\u4e3b\u673a\u7684 MAC<\/li>\n<\/ul>\n\n\n\n<p>\u9898\u56fe\u4e2d\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>H4 \u7684 MAC\uff1a<code>00-11-11-11-11-D1<\/code><\/li>\n\n\n\n<li>H5 \u7684 MAC\uff1a<code>00-11-11-11-11-E1<\/code><\/li>\n\n\n\n<li>AP \u7684 MAC\uff1a<code>00-11-11-11-11-C1<\/code><\/li>\n<\/ul>\n\n\n\n<p>\u6240\u4ee5\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5730\u57401 = <strong>00-11-11-11-11-E1<\/strong><\/li>\n\n\n\n<li>\u5730\u57402 = <strong>00-11-11-11-11-C1<\/strong><\/li>\n\n\n\n<li>\u5730\u57403 = <strong>00-11-11-11-11-D1<\/strong><\/li>\n<\/ul>\n\n\n\n<p>\u8fd9\u4e00\u95ee\u6700\u5bb9\u6613\u9519\u7684\u5730\u65b9\uff0c\u662f\u628a\u5730\u57402\u5199\u6210 H4 \u7684 MAC\u3002<br>\u4f46\u9898\u76ee\u95ee\u7684\u662f <strong>H5 \u6536\u5230\u7684\u5e27<\/strong>\uff0c\u8fd9\u662f AP \u53d1\u51fa\u7684\u90a3\u4e00\u8df3\uff0c\u6240\u4ee5\u5730\u57402\u5fc5\u987b\u662f <strong>AP \u7684 MAC<\/strong>\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<figure class=\"wp-block-image size-large\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/www.preluna.xyz\/wp-content\/uploads\/2026\/04\/18-173x1024.jpg'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"173\" height=\"1024\" data-original=\"http:\/\/www.preluna.xyz\/wp-content\/uploads\/2026\/04\/18-173x1024.jpg\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-1977\"  sizes=\"auto, (max-width: 173px) 100vw, 173px\" \/><\/div><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">\u7b2c18\u9898\u89e3\u6790<\/h2>\n\n\n\n<p>\u8fd9\u9053\u9898\u4e3b\u8981\u8003\u4e09\u4e2a\u4e3b\u7ebf\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u536b\u661f\u94fe\u8def\u7684\u4f20\u64ad\u65f6\u5ef6<\/li>\n\n\n\n<li>GBN \u6ed1\u52a8\u7a97\u53e3\u5229\u7528\u7387<\/li>\n\n\n\n<li>\u53d8\u957f\u5b50\u7f51\u5212\u5206 VLSM<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b2c1\u95ee\uff1a\u5355\u5411\u4f20\u64ad\u65f6\u5ef6\u3001\u6700\u5927\u541e\u5410\u91cf\u3001\u53d1\u9001 4000B \u6587\u4ef6\u81f3\u5c11\u9700\u8981\u591a\u4e45<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">\uff081\uff09R1 \u5230 R2 \u4e4b\u95f4\u536b\u661f\u94fe\u8def\u7684\u5355\u5411\u4f20\u64ad\u65f6\u5ef6<\/h4>\n\n\n\n<p>\u536b\u661f\u8f68\u9053\u9ad8\u5ea6\u662f 36000 km\u3002<br>R1 \u53d1\u5230\u536b\u661f\u8981\u4e0a\u884c\u4e00\u6b21\uff0c\u536b\u661f\u518d\u5230 R2 \u8981\u4e0b\u884c\u4e00\u6b21\uff0c\u6240\u4ee5\u5355\u5411\u4f20\u64ad\u8ddd\u79bb\u662f\uff1a<\/p>\n\n\n\n<p><code>36000 + 36000 = 72000 km<\/code><\/p>\n\n\n\n<p>\u7535\u78c1\u6ce2\u4f20\u64ad\u901f\u5ea6\u662f\uff1a<\/p>\n\n\n\n<p><code>300000 km\/s<\/code><\/p>\n\n\n\n<p>\u6240\u4ee5\u5355\u5411\u4f20\u64ad\u65f6\u5ef6\uff1a<\/p>\n\n\n\n<p><code>72000 \/ 300000 = 0.24 s<\/code><\/p>\n\n\n\n<p>\u6240\u4ee5\u7b54\u6848\u662f\uff1a<\/p>\n\n\n\n<p><strong>0.24 s\uff0c\u4e5f\u5c31\u662f 240 ms<\/strong><\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\uff082\uff09\u4e3b\u673a H \u5411\u603b\u90e8\u670d\u52a1\u5668\u4f20\u8f93\u6570\u636e\u65f6\u53ef\u8fbe\u5230\u7684\u6700\u5927\u541e\u5410\u91cf<\/h4>\n\n\n\n<p>\u94fe\u8def\u74f6\u9888\u663e\u7136\u662f\u536b\u661f\u94fe\u8def\u3002\u9898\u76ee\u5df2\u7ecf\u8bf4\u660e\uff1a<\/p>\n\n\n\n<p>\u6bcf\u4e2a\u65b9\u5411\u7684\u6570\u636e\u4f20\u8f93\u901f\u7387\u5747\u4e3a <strong>200 kb\/s<\/strong><\/p>\n\n\n\n<p>\u56e0\u6b64\u6700\u5927\u541e\u5410\u91cf\u5c31\u662f\uff1a<\/p>\n\n\n\n<p><strong>200 kb\/s<\/strong><\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\uff083\uff09\u4e0a\u4f20 4000B \u6587\u4ef6\u81f3\u5c11\u9700\u8981\u591a\u4e45<\/h4>\n\n\n\n<p>4000B =<\/p>\n\n\n\n<p><code>4000 \u00d7 8 = 32000 bit<\/code><\/p>\n\n\n\n<p>\u536b\u661f\u94fe\u8def\u53d1\u9001\u8fd9 32000 bit \u6240\u9700\u7684\u53d1\u9001\u65f6\u5ef6\u662f\uff1a<\/p>\n\n\n\n<p><code>32000 \/ 200000 = 0.16 s<\/code><\/p>\n\n\n\n<p>\u6700\u540e 1 bit \u53d1\u5b8c\u4ee5\u540e\uff0c\u8fd8\u8981\u518d\u7ecf\u8fc7\u5355\u5411\u4f20\u64ad\u65f6\u5ef6 0.24 s \u624d\u80fd\u5230\u8fbe\u5bf9\u7aef\u3002<\/p>\n\n\n\n<p>\u6240\u4ee5\u603b\u65f6\u95f4\u81f3\u5c11\u4e3a\uff1a<\/p>\n\n\n\n<p><code>0.16 + 0.24 = 0.40 s<\/code><\/p>\n\n\n\n<p>\u6240\u4ee5\u7b54\u6848\u662f\uff1a<\/p>\n\n\n\n<p><strong>0.40 s<\/strong><\/p>\n\n\n\n<p>\u8fd9\u91cc\u7684\u601d\u8def\u5f88\u6807\u51c6\uff1a<\/p>\n\n\n\n<p>\u603b\u65f6\u95f4 = \u53d1\u9001\u65f6\u5ef6 + \u4f20\u64ad\u65f6\u5ef6<\/p>\n\n\n\n<p>\u9898\u76ee\u53c8\u8bf4\u5ffd\u7565\u9996\u90e8\u5f00\u9500\u548c\u4ee5\u592a\u7f51\u5185\u4f20\u64ad\u65f6\u5ef6\uff0c\u56e0\u6b64\u4e0d\u9700\u8981\u518d\u989d\u5916\u7b97\u5c40\u57df\u7f51\u90e8\u5206\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b2c2\u95ee\uff1aGBN \u4e0b\u53d1\u9001\u7a97\u53e3\u81f3\u5c11\u591a\u5927\uff1f\u5e8f\u53f7\u5b57\u6bb5\u81f3\u5c11\u591a\u5c11\u4f4d\uff1f<\/h3>\n\n\n\n<p>\u9898\u76ee\u6761\u4ef6\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5355\u5411\u53ef\u9760\u6570\u636e\u94fe\u8def\u534f\u8bae\uff0c\u91c7\u7528 GBN<\/li>\n\n\n\n<li>SLP \u6570\u636e\u5e27\u957f 1500B<\/li>\n\n\n\n<li>ACK \u5e27\u957f\u5ea6\u5ffd\u7565<\/li>\n\n\n\n<li>\u94fe\u8def\u901f\u7387 200 kb\/s<\/li>\n\n\n\n<li>\u8981\u6c42\u5355\u5411\u4fe1\u9053\u5229\u7528\u7387\u4e0d\u4f4e\u4e8e 80%<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\">\u7b2c\u4e00\u6b65\uff1a\u7b97\u53d1\u9001\u4e00\u5e27\u6240\u9700\u65f6\u95f4 Tt<\/h4>\n\n\n\n<p><code>1500B = 1500 \u00d7 8 = 12000 bit<\/code><\/p>\n\n\n\n<p>\u6240\u4ee5\u53d1\u9001\u65f6\u5ef6\uff1a<\/p>\n\n\n\n<p><code>Tt = 12000 \/ 200000 = 0.06 s = 60 ms<\/code><\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u7b2c\u4e8c\u6b65\uff1a\u7b97\u4f20\u64ad\u65f6\u5ef6 Tp<\/h4>\n\n\n\n<p>\u7b2c1\u95ee\u5df2\u7ecf\u7b97\u51fa\u5355\u5411\u4f20\u64ad\u65f6\u5ef6\uff1a<\/p>\n\n\n\n<p><code>Tp = 0.24 s = 240 ms<\/code><\/p>\n\n\n\n<p>\u4e8e\u662f\uff1a<\/p>\n\n\n\n<p><code>a = Tp \/ Tt = 0.24 \/ 0.06 = 4<\/code><\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u7b2c\u4e09\u6b65\uff1a\u5957 GBN \u5229\u7528\u7387\u516c\u5f0f<\/h4>\n\n\n\n<p>\u65e0\u5dee\u9519\u60c5\u51b5\u4e0b\uff0cGBN \u7684\u4fe1\u9053\u5229\u7528\u7387\u516c\u5f0f\u5e38\u5199\u4e3a\uff1a<\/p>\n\n\n\n<p><code>U = W \/ (1 + 2a)<\/code>\uff0c\u4f46\u6700\u5927\u4e0d\u8d85\u8fc7 1<\/p>\n\n\n\n<p>\u8fd9\u91cc\uff1a<\/p>\n\n\n\n<p><code>1 + 2a = 1 + 8 = 9<\/code><\/p>\n\n\n\n<p>\u56e0\u6b64\uff1a<\/p>\n\n\n\n<p><code>U = W \/ 9<\/code><\/p>\n\n\n\n<p>\u8981\u6c42 <code>U \u2265 0.8<\/code>\uff0c\u6240\u4ee5\uff1a<\/p>\n\n\n\n<p><code>W \/ 9 \u2265 0.8<\/code><\/p>\n\n\n\n<p><code>W \u2265 7.2<\/code><\/p>\n\n\n\n<p>\u53d1\u9001\u7a97\u53e3\u81f3\u5c11\u53d6\u6574\u6570\uff1a<\/p>\n\n\n\n<p><strong>W = 8<\/strong><\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u7b2c\u56db\u6b65\uff1a\u6c42\u5e8f\u53f7\u5b57\u6bb5\u81f3\u5c11\u591a\u5c11\u4f4d<\/h4>\n\n\n\n<p>GBN \u4e2d\uff0c\u82e5\u5e8f\u53f7\u5b57\u6bb5\u4e3a n \u4f4d\uff0c\u5219\u53d1\u9001\u7a97\u53e3\u6700\u5927\u503c\u6ee1\u8db3\uff1a<\/p>\n\n\n\n<p><code>W \u2264 2^n - 1<\/code><\/p>\n\n\n\n<p>\u73b0\u5728\u8981\u6c42 <code>W \u2265 8<\/code>\uff0c\u6240\u4ee5\u5fc5\u987b\u6ee1\u8db3\uff1a<\/p>\n\n\n\n<p><code>2^n - 1 \u2265 8<\/code><\/p>\n\n\n\n<p><code>2^n \u2265 9<\/code><\/p>\n\n\n\n<p>\u6700\u5c0f\u7684 n \u662f\uff1a<\/p>\n\n\n\n<p><strong>4 \u4f4d<\/strong><\/p>\n\n\n\n<p>\u6240\u4ee5\u7b54\u6848\u662f\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u53d1\u9001\u7a97\u53e3\u81f3\u5c11\uff1a<strong>8<\/strong><\/li>\n\n\n\n<li>\u5e8f\u53f7\u5b57\u6bb5\u81f3\u5c11\uff1a<strong>4 \u4f4d<\/strong><\/li>\n<\/ul>\n\n\n\n<p>\u8fd9\u4e00\u95ee\u6700\u5bb9\u6613\u72af\u7684\u9519\u6709\u4e24\u4e2a\uff1a<\/p>\n\n\n\n<p>\u7b2c\u4e00\uff0c\u628a <code>a<\/code> \u7b97\u6210 <code>Tt \/ Tp<\/code>\u3002\u5b9e\u9645\u4e0a\u662f <code>a = Tp \/ Tt<\/code>\u3002<br>\u7b2c\u4e8c\uff0c\u628a GBN \u7684\u7a97\u53e3\u4e0a\u9650\u5199\u6210 <code>2^n<\/code>\u3002GBN \u6b63\u786e\u662f\uff1a<\/p>\n\n\n\n<p><code>Wt \u2264 2^n - 1<\/code><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b2c3\u95ee\uff1a\u4f5c\u4e1a\u533a\u3001\u7ba1\u7406\u533a\u3001\u751f\u6d3b\u533a\u4e09\u4e2a\u5b50\u7f51\u5206\u522b\u662f\u4ec0\u4e48<\/h3>\n\n\n\n<p>\u5df2\u77e5\u603b\u90e8\u7ed9\u5de5\u7a0b\u90e8\u5206\u914d\u7684\u5730\u5740\u7a7a\u95f4\u662f\uff1a<\/p>\n\n\n\n<p><strong>10.10.10.0\/24<\/strong><\/p>\n\n\n\n<p>\u8981\u6c42\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u751f\u6d3b\u533a\u53ef\u5206\u914d IP \u5730\u5740\u6570\u4e0d\u5c11\u4e8e 120 \u4e2a<\/li>\n\n\n\n<li>\u4f5c\u4e1a\u533a\u4e0d\u5c11\u4e8e 60 \u4e2a<\/li>\n\n\n\n<li>\u7ba1\u7406\u533a\u4e0d\u5c11\u4e8e 60 \u4e2a<\/li>\n\n\n\n<li>\u4e3b\u673a H \u7684\u5730\u5740\u5df2\u7ecf\u6b63\u786e\u914d\u7f6e\u4e3a\uff1a<code>10.10.10.33\/26<\/code><\/li>\n<\/ul>\n\n\n\n<p>\u8fd9\u95ee\u672c\u8d28\u662f <strong>VLSM \u53d8\u957f\u5b50\u7f51\u5212\u5206<\/strong>\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u7b2c\u4e00\u6b65\uff1a\u5148\u770b\u6bcf\u7c7b\u9700\u6c42\u5bf9\u5e94\u4ec0\u4e48\u524d\u7f00\u957f\u5ea6<\/h4>\n\n\n\n<p>\u751f\u6d3b\u533a\u9700\u8981\u4e0d\u5c11\u4e8e 120 \u4e2a\u53ef\u5206\u914d\u5730\u5740\u3002<\/p>\n\n\n\n<p>\u53ef\u5206\u914d\u5730\u5740\u6570\u516c\u5f0f\uff1a<\/p>\n\n\n\n<p><code>2^h - 2<\/code><\/p>\n\n\n\n<p>\u8981\u6ee1\u8db3\uff1a<\/p>\n\n\n\n<p><code>2^h - 2 \u2265 120<\/code><\/p>\n\n\n\n<p>\u53d6 <code>h = 7<\/code> \u65f6\uff1a<\/p>\n\n\n\n<p><code>2^7 - 2 = 126<\/code><\/p>\n\n\n\n<p>\u6240\u4ee5\u751f\u6d3b\u533a\u5e94\u5212\u4e3a\uff1a<\/p>\n\n\n\n<p><strong>\/25<\/strong><\/p>\n\n\n\n<p>\u4f5c\u4e1a\u533a\u548c\u7ba1\u7406\u533a\u90fd\u4e0d\u5c11\u4e8e 60 \u4e2a\uff1a<\/p>\n\n\n\n<p>\u53d6 <code>h = 6<\/code> \u65f6\uff1a<\/p>\n\n\n\n<p><code>2^6 - 2 = 62<\/code><\/p>\n\n\n\n<p>\u6ee1\u8db3\u8981\u6c42\uff0c\u6240\u4ee5\u8fd9\u4e24\u4e2a\u5b50\u7f51\u90fd\u5e94\u5212\u4e3a\uff1a<\/p>\n\n\n\n<p><strong>\/26<\/strong><\/p>\n\n\n\n<p>\u4e8e\u662f\u6574\u4e2a \/24 \u88ab\u5212\u6210\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u4e00\u4e2a \/25<\/li>\n\n\n\n<li>\u4e24\u4e2a \/26<\/li>\n<\/ul>\n\n\n\n<p>\u8fd9\u4e09\u5757\u521a\u597d\u628a \/24 \u5206\u5b8c\uff0c\u56e0\u4e3a\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\/25 \u5360 128 \u4e2a\u5730\u5740<\/li>\n\n\n\n<li>\/26 \u5360 64 \u4e2a\u5730\u5740<\/li>\n\n\n\n<li>\/26 \u5360 64 \u4e2a\u5730\u5740<\/li>\n<\/ul>\n\n\n\n<p>\u603b\u5171 <code>128 + 64 + 64 = 256<\/code><\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u7b2c\u4e8c\u6b65\uff1a\u6839\u636e H \u7684\u5730\u5740\u786e\u5b9a\u7ba1\u7406\u533a<\/h4>\n\n\n\n<p>H \u7684\u5730\u5740\u662f\uff1a<\/p>\n\n\n\n<p><code>10.10.10.33\/26<\/code><\/p>\n\n\n\n<p>\/26 \u7684\u5757\u5927\u5c0f\u662f 64\uff0c\u6240\u4ee5\u5404\u5b50\u7f51\u8d77\u70b9\u53ea\u80fd\u662f\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>10.10.10.0\/26<\/li>\n\n\n\n<li>10.10.10.64\/26<\/li>\n\n\n\n<li>10.10.10.128\/26<\/li>\n\n\n\n<li>10.10.10.192\/26<\/li>\n<\/ul>\n\n\n\n<p>33 \u843d\u5728 <code>0~63<\/code> \u8fd9\u4e2a\u8303\u56f4\uff0c\u6240\u4ee5 H \u6240\u5728\u7684\u7ba1\u7406\u533a\u4e00\u5b9a\u662f\uff1a<\/p>\n\n\n\n<p><strong>10.10.10.0\/26<\/strong><\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u7b2c\u4e09\u6b65\uff1a\u5269\u4f59\u5730\u5740\u518d\u5206\u7ed9\u53e6\u5916\u4e24\u4e2a\u5b50\u7f51<\/h4>\n\n\n\n<p>\u7ba1\u7406\u533a\u7528\u4e86 <code>10.10.10.0\/26<\/code>\uff0c\u5269\u4e0b\u5730\u5740\u7a7a\u95f4\u4ece <code>10.10.10.64<\/code> \u5f00\u59cb\u3002<\/p>\n\n\n\n<p>\u751f\u6d3b\u533a\u9700\u8981 \/25\uff0c\u800c \/25 \u7684\u5408\u6cd5\u8d77\u70b9\u53ea\u80fd\u6309 128 \u5bf9\u9f50\uff0c\u6240\u4ee5\u53ea\u80fd\u662f\uff1a<\/p>\n\n\n\n<p><strong>10.10.10.128\/25<\/strong><\/p>\n\n\n\n<p>\u90a3\u4e48\u5269\u4e0b\u7ed9\u4f5c\u4e1a\u533a\u7684\u5c31\u662f\uff1a<\/p>\n\n\n\n<p><strong>10.10.10.64\/26<\/strong><\/p>\n\n\n\n<p>\u56e0\u6b64\uff0c\u6309\u9898\u76ee\u8981\u6c42\u7684\u987a\u5e8f\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u4f5c\u4e1a\u533a\u5b50\u7f51\uff1a<strong>10.10.10.64\/26<\/strong><\/li>\n\n\n\n<li>\u7ba1\u7406\u533a\u5b50\u7f51\uff1a<strong>10.10.10.0\/26<\/strong><\/li>\n\n\n\n<li>\u751f\u6d3b\u533a\u5b50\u7f51\uff1a<strong>10.10.10.128\/25<\/strong><\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e24\u9053\u9898\u6700\u540e\u7684\u7b54\u6848\u6c47\u603b<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b2c17\u9898\u7b54\u6848<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u8bbe\u59071\u662f <strong>\u4ea4\u6362\u673a<\/strong>\uff0c\u8bbe\u59072\u662f <strong>Hub<\/strong><\/li>\n\n\n\n<li>H2 \u4e0e H3 \u4e4b\u95f4\u6700\u8fdc\u8ddd\u79bb\uff1a<strong>212 m<\/strong>\n<ul class=\"wp-block-list\">\n<li>M \u662f <strong>DHCP Discover<\/strong><\/li>\n\n\n\n<li>\u8def\u7531\u5668 E0 <strong>\u80fd\u6536\u5230<\/strong>\u5c01\u88c5 M \u7684\u4ee5\u592a\u7f51\u5e27<\/li>\n\n\n\n<li>S \u8f6c\u53d1\u7ed9 DHCP \u670d\u52a1\u5668\u65f6\uff0c\u8be5\u5e27\u7684\u76ee\u7684 MAC \u662f <strong>FF-FF-FF-FF-FF-FF<\/strong><\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>H5 \u6536\u5230\u7684 802.11 \u5e27\u4e2d\uff1a\n<ul class=\"wp-block-list\">\n<li>\u5730\u57401\uff1a<strong>00-11-11-11-11-E1<\/strong><\/li>\n\n\n\n<li>\u5730\u57402\uff1a<strong>00-11-11-11-11-C1<\/strong><\/li>\n\n\n\n<li>\u5730\u57403\uff1a<strong>00-11-11-11-11-D1<\/strong><\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b2c18\u9898\u7b54\u6848<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li><ul><li>\u5355\u5411\u4f20\u64ad\u65f6\u5ef6\uff1a<strong>0.24 s<\/strong><\/li><li>\u6700\u5927\u541e\u5410\u91cf\uff1a<strong>200 kb\/s<\/strong><\/li><li>\u4e0a\u4f20 4000B \u6587\u4ef6\u81f3\u5c11\u9700\u8981\uff1a<strong>0.40 s<\/strong><\/li><\/ul><ul><li>\u53d1\u9001\u7a97\u53e3\u81f3\u5c11\uff1a<strong>8<\/strong><\/li><li>\u5e8f\u53f7\u5b57\u6bb5\u81f3\u5c11\uff1a<strong>4 \u4f4d<\/strong><\/li><\/ul>\n<ul class=\"wp-block-list\">\n<li>\u4f5c\u4e1a\u533a\u5b50\u7f51\uff1a<strong>10.10.10.64\/26<\/strong><\/li>\n\n\n\n<li>\u7ba1\u7406\u533a\u5b50\u7f51\uff1a<strong>10.10.10.0\/26<\/strong><\/li>\n\n\n\n<li>\u751f\u6d3b\u533a\u5b50\u7f51\uff1a<strong>10.10.10.128\/25<\/strong><\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u8fd9\u51e0\u9898\u672c\u8d28\u4e0a\u4e3b\u8981\u8003\u4e24\u7c7b\u5185\u5bb9\uff1a \u4e00\u7c7b\u662f IP \u5206\u7247\uff1b\u53e6\u4e00\u7c7b\u662f \u5b50\u7f51\u5212\u5206 \/ CIDR \/ \u6700\u957f\u524d\u7f00\u5339\u914d\u3002 \u7b2c1\u9898 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[54],"tags":[],"class_list":["post-1966","post","type-post","status-publish","format-standard","hentry","category-text"],"_links":{"self":[{"href":"http:\/\/www.preluna.xyz\/index.php\/wp-json\/wp\/v2\/posts\/1966","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.preluna.xyz\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.preluna.xyz\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.preluna.xyz\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.preluna.xyz\/index.php\/wp-json\/wp\/v2\/comments?post=1966"}],"version-history":[{"count":2,"href":"http:\/\/www.preluna.xyz\/index.php\/wp-json\/wp\/v2\/posts\/1966\/revisions"}],"predecessor-version":[{"id":1978,"href":"http:\/\/www.preluna.xyz\/index.php\/wp-json\/wp\/v2\/posts\/1966\/revisions\/1978"}],"wp:attachment":[{"href":"http:\/\/www.preluna.xyz\/index.php\/wp-json\/wp\/v2\/media?parent=1966"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.preluna.xyz\/index.php\/wp-json\/wp\/v2\/categories?post=1966"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.preluna.xyz\/index.php\/wp-json\/wp\/v2\/tags?post=1966"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}