{"id":1953,"date":"2026-04-16T21:05:23","date_gmt":"2026-04-16T13:05:23","guid":{"rendered":"http:\/\/www.preluna.xyz\/?p=1953"},"modified":"2026-04-17T10:27:27","modified_gmt":"2026-04-17T02:27:27","slug":"%e8%b7%af%e7%94%b1%e8%a1%a8%e6%9c%80%e9%95%bf%e5%89%8d%e7%bc%80%e5%8c%b9%e9%85%8d%e3%80%81%e5%ad%90%e7%bd%91%e5%88%92%e5%88%86%e3%80%81%e9%bb%98%e8%ae%a4%e7%bd%91%e5%85%b3%e3%80%81nat%e3%80%81","status":"publish","type":"post","link":"http:\/\/www.preluna.xyz\/index.php\/2026\/04\/16\/%e8%b7%af%e7%94%b1%e8%a1%a8%e6%9c%80%e9%95%bf%e5%89%8d%e7%bc%80%e5%8c%b9%e9%85%8d%e3%80%81%e5%ad%90%e7%bd%91%e5%88%92%e5%88%86%e3%80%81%e9%bb%98%e8%ae%a4%e7%bd%91%e5%85%b3%e3%80%81nat%e3%80%81\/preluna\/text\/","title":{"rendered":"\u8def\u7531\u8868\u6700\u957f\u524d\u7f00\u5339\u914d\u3001\u5b50\u7f51\u5212\u5206\u3001\u9ed8\u8ba4\u7f51\u5173\u3001NAT\u3001\u7279\u6b8a IP \u5730\u5740\u3001\u8def\u7531\u805a\u5408\u3001\u8de8\u7f51\u6bb5\u901a\u4fe1\u65f6 IP \u5730\u5740\u4e0e MAC \u5730\u5740\u7684\u53d8\u5316"},"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\/57-1024x768.jpg'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"768\" data-original=\"http:\/\/www.preluna.xyz\/wp-content\/uploads\/2026\/04\/57-1024x768.jpg\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-1954\"  sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/div><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">57 \u9898\uff1a\u8def\u7531\u8868\u5339\u914d\uff0c\u9009\u54ea\u6761\u8def\u7531<\/h2>\n\n\n\n<p>\u9898\u5e72\u91cc\u8def\u7531\u8868\u662f\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>169.96.40.0\/23 -&gt; S1<\/li>\n\n\n\n<li>169.96.40.0\/25 -&gt; S2<\/li>\n\n\n\n<li>169.96.40.0\/27 -&gt; S3<\/li>\n\n\n\n<li>0.0.0.0\/0 -&gt; S4<\/li>\n<\/ul>\n\n\n\n<p>\u6536\u5230\u7684 IP \u5206\u7ec4\u76ee\u7684\u5730\u5740\u662f <code>169.96.40.5<\/code>\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u672c\u9898\u7ed3\u8bba<\/h3>\n\n\n\n<p>\u9009 <strong>C\uff0cS3<\/strong>\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u672c\u9898\u8003\u67e5\u4ec0\u4e48<\/h3>\n\n\n\n<p>\u8fd9\u662f\u975e\u5e38\u5178\u578b\u7684\u201c<strong>\u6700\u957f\u524d\u7f00\u5339\u914d<\/strong>\u201d\u9898\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u600e\u4e48\u505a<\/h3>\n\n\n\n<p>\u5148\u5224\u65ad <code>169.96.40.5<\/code> \u662f\u5426\u843d\u5728\u5404\u4e2a\u524d\u7f00\u8303\u56f4\u5185\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>169.96.40.0\/23<\/code>\uff1a\u8303\u56f4\u5f88\u5927\uff0c\u80fd\u5339\u914d<\/li>\n\n\n\n<li><code>169.96.40.0\/25<\/code>\uff1a<code>169.96.40.0 ~ 169.96.40.127<\/code>\uff0c\u80fd\u5339\u914d<\/li>\n\n\n\n<li><code>169.96.40.0\/27<\/code>\uff1a<code>169.96.40.0 ~ 169.96.40.31<\/code>\uff0c\u4e5f\u80fd\u5339\u914d<\/li>\n\n\n\n<li><code>0.0.0.0\/0<\/code>\uff1a\u9ed8\u8ba4\u8def\u7531\uff0c\u80af\u5b9a\u4e5f\u80fd\u5339\u914d<\/li>\n<\/ul>\n\n\n\n<p>\u4f46\u8def\u7531\u5668\u4e0d\u662f\u201c\u968f\u4fbf\u627e\u4e00\u6761\u80fd\u5339\u914d\u7684\u201d\uff0c\u800c\u662f\u8981\u627e<strong>\u524d\u7f00\u6700\u957f\u7684\u90a3\u4e00\u6761<\/strong>\u3002<br><code>\/27<\/code> \u6bd4 <code>\/25<\/code>\u3001<code>\/23<\/code> \u66f4\u957f\uff0c\u6240\u4ee5\u8d70 <code>S3<\/code>\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u6613\u9519\u70b9<\/h3>\n\n\n\n<p>\u5f88\u591a\u4eba\u4e00\u770b\u5230\u6709 <code>\/23<\/code> \u5c31\u5148\u9009\u4e86\uff0c\u56e0\u4e3a\u5b83\u201c\u5148\u51fa\u73b0\u201d\u6216\u8005\u201c\u770b\u8d77\u6765\u8986\u76d6\u5230\u4e86\u201d\u3002\u8fd9\u662f\u9519\u7684\u3002<br>\u8def\u7531\u9009\u62e9\u4e0d\u770b\u8868\u9879\u987a\u5e8f\uff0c\u6838\u5fc3\u53ea\u770b\uff1a<strong>\u5339\u914d + \u524d\u7f00\u6700\u957f<\/strong>\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u540c\u7c7b\u9898\u5feb\u901f\u8bc6\u522b<\/h3>\n\n\n\n<p>\u53ea\u8981\u9898\u76ee\u91cc\u540c\u65f6\u7ed9\u51fa\u591a\u4e2a\u524d\u7f00\uff0c\u4e14\u76ee\u7684\u5730\u5740\u80fd\u843d\u5165\u591a\u4e2a\u7f51\u6bb5\uff0c\u5c31\u76f4\u63a5\u542f\u52a8\u201c\u6700\u957f\u524d\u7f00\u5339\u914d\u201d\u601d\u8def\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">58 \u9898\uff1a\u9ed8\u8ba4\u7f51\u5173\u548c\u5b50\u7f51\u63a9\u7801\u914d\u7f6e\u9519\u8bef\u5bfc\u81f4\u4ec0\u4e48\u73b0\u8c61<\/h2>\n\n\n\n<p>\u56fe\u4e2d\u4e3b\u673a\u5730\u5740\u5927\u81f4\u662f\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>H1\uff1a192.168.3.2<\/li>\n\n\n\n<li>H2\uff1a192.168.3.3<\/li>\n\n\n\n<li>H3\uff1a192.168.3.251<\/li>\n\n\n\n<li>H4\uff1a192.168.3.252<\/li>\n<\/ul>\n\n\n\n<p>\u5e76\u4e14\u9898\u76ee\u7279\u522b\u8bf4\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>H1\u3001H2 \u7684\u9ed8\u8ba4\u7f51\u5173\u662f <code>192.168.3.1<\/code>\uff0c\u63a9\u7801\u662f <code>255.255.255.128<\/code><\/li>\n\n\n\n<li>H3\u3001H4 \u7684\u9ed8\u8ba4\u7f51\u5173\u662f <code>192.168.3.254<\/code>\uff0c\u63a9\u7801\u662f <code>255.255.255.128<\/code><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u672c\u9898\u7ed3\u8bba<\/h3>\n\n\n\n<p>\u9009 <strong>C\uff0cH1 \u4e0d\u80fd\u4e0e H3 \u8fdb\u884c\u6b63\u5e38 IP \u901a\u4fe1<\/strong>\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u672c\u9898\u8003\u67e5\u4ec0\u4e48<\/h3>\n\n\n\n<p>\u8fd9\u9898\u8003\u7684\u662f\u51e0\u4e2a\u70b9\u53e0\u5728\u4e00\u8d77\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><code>\/25<\/code> \u7684\u5b50\u7f51\u5212\u5206<\/li>\n\n\n\n<li>\u4e3b\u673a\u5982\u4f55\u5224\u65ad\u201c\u5bf9\u65b9\u4e0e\u6211\u662f\u5426\u540c\u4e00\u5b50\u7f51\u201d<\/li>\n\n\n\n<li>\u9ed8\u8ba4\u7f51\u5173\u7684\u4f5c\u7528<\/li>\n\n\n\n<li>\u7269\u7406\u4e0a\u8fde\u5728\u4e00\u4e2a\u4ea4\u6362\u7f51\u7edc\u91cc\uff0c\u4e0d\u7b49\u4e8e\u903b\u8f91\u4e0a\u4e00\u5b9a\u80fd\u76f4\u63a5\u901a\u4fe1<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\">\u5148\u628a\u5b50\u7f51\u5212\u5206\u51fa\u6765<\/h3>\n\n\n\n<p><code>255.255.255.128 = \/25<\/code>\uff0c\u4e00\u4e2a C \u7c7b\u7f51\u88ab\u5206\u6210\u4e24\u4e2a\u5b50\u7f51\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>192.168.3.0\/25<\/code>\uff0c\u4e3b\u673a\u8303\u56f4 <code>192.168.3.1 ~ 192.168.3.126<\/code><\/li>\n\n\n\n<li><code>192.168.3.128\/25<\/code>\uff0c\u4e3b\u673a\u8303\u56f4 <code>192.168.3.129 ~ 192.168.3.254<\/code><\/li>\n<\/ul>\n\n\n\n<p>\u4e8e\u662f\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>H1\u3001H2 \u5728 <code>192.168.3.0\/25<\/code><\/li>\n\n\n\n<li>H3\u3001H4 \u5728 <code>192.168.3.128\/25<\/code><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u5173\u952e\u5224\u65ad<\/h3>\n\n\n\n<p>H1 \u770b H2\uff1a\u540c\u4e00\u5b50\u7f51\uff0c\u53ef\u4ee5\u76f4\u63a5 ARP\uff0c\u76f4\u63a5\u53d1\u3002<br>H3 \u770b H4\uff1a\u540c\u4e00\u5b50\u7f51\uff0c\u4e5f\u53ef\u4ee5\u76f4\u63a5 ARP\uff0c\u76f4\u63a5\u53d1\u3002<br>\u6240\u4ee5 A\u3001D \u90fd\u4e0d\u5bf9\u3002<\/p>\n\n\n\n<p>H1 \u770b H3\uff1a\u4e0d\u540c\u5b50\u7f51\u3002<br>\u8fd9\u65f6 H1 \u4e0d\u4f1a\u76f4\u63a5\u627e H3 \u7684 MAC\uff0c\u800c\u662f\u628a\u6570\u636e\u4ea4\u7ed9\u9ed8\u8ba4\u7f51\u5173 <code>192.168.3.1<\/code>\u3002<br>\u95ee\u9898\u5c31\u5728\u8fd9\u91cc\uff1a\u56fe\u91cc\u771f\u6b63\u63a5\u5728\u8fd9\u4e2a\u5c40\u57df\u7f51\u4e0a\u7684\u8def\u7531\u5668\u63a5\u53e3\u662f <code>192.168.3.254<\/code>\uff0c\u4e0d\u662f <code>192.168.3.1<\/code>\u3002<br>\u4e5f\u5c31\u662f\u8bf4\uff0cH1\/H2 \u7684\u9ed8\u8ba4\u7f51\u5173<strong>\u914d\u9519\u4e86<\/strong>\u3002\u4e8e\u662f H1 \u53d1\u5f80\u5f02\u7f51\u7684\u6570\u636e\u62a5\uff0c\u6839\u672c\u4ea4\u4e0d\u51fa\u53bb\u3002<\/p>\n\n\n\n<p>\u6240\u4ee5 H1 \u65e0\u6cd5\u4e0e H3 \u6b63\u5e38 IP \u901a\u4fe1\uff0cC \u6b63\u786e\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u4e3a\u4ec0\u4e48 B \u4e0d\u5bf9<\/h3>\n\n\n\n<p>B \u8bf4\u201cH2 \u4e0e H4 \u5747\u4e0d\u80fd\u8bbf\u95ee Internet\u201d\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>H2 \u7684\u9ed8\u8ba4\u7f51\u5173\u786e\u5b9e\u9519\u4e86\uff0c\u6240\u4ee5 H2 \u8bbf\u95ee Internet \u4e0d\u884c\u3002<\/li>\n\n\n\n<li>\u4f46 H4 \u7684\u9ed8\u8ba4\u7f51\u5173 <code>192.168.3.254<\/code> \u662f\u5b58\u5728\u7684\uff0c\u6240\u4ee5 H4 \u662f\u6709\u53ef\u80fd\u8bbf\u95ee Internet \u7684\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u56e0\u6b64 B \u9519\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u8fd9\u9898\u6700\u5bb9\u6613\u9519\u5728\u54ea\u91cc<\/h3>\n\n\n\n<p>\u6700\u5bb9\u6613\u9519\u5728\u201c\u660e\u660e\u90fd\u8fde\u5728\u4ea4\u6362\u673a\/\u96c6\u7ebf\u5668\u4e0a\uff0c\u4e3a\u4ec0\u4e48\u8fd8\u4e0d\u80fd\u901a\u4fe1\uff1f\u201d<\/p>\n\n\n\n<p>\u56e0\u4e3a IP \u901a\u4fe1\u5148\u770b\u7684\u662f<strong>\u903b\u8f91\u5b50\u7f51<\/strong>\uff0c\u4e0d\u662f\u5148\u770b\u7269\u7406\u8fde\u7ebf\u3002<br>\u4e3b\u673a\u662f\u5426\u76f4\u63a5 ARP \u5bf9\u65b9\uff0c\u4e0d\u662f\u770b\u201c\u7f51\u7ebf\u901a\u4e0d\u901a\u201d\uff0c\u800c\u662f\u770b\u201c\u6839\u636e\u81ea\u5df1\u7684\u63a9\u7801\u8ba1\u7b97\uff0c\u5bf9\u65b9\u662f\u5426\u4e0e\u81ea\u5df1\u540c\u7f51\u6bb5\u201d\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u540c\u7c7b\u9898\u5feb\u901f\u8bc6\u522b<\/h3>\n\n\n\n<p>\u770b\u5230\u201c\u4e3b\u673a IP + \u5b50\u7f51\u63a9\u7801 + \u9ed8\u8ba4\u7f51\u5173\u201d\u4e09\u4ef6\u5957\u4e00\u8d77\u51fa\u73b0\uff0c\u57fa\u672c\u5c31\u662f\u5728\u8003\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u662f\u5426\u540c\u4e00\u5b50\u7f51<\/li>\n\n\n\n<li>\u662f\u5426\u9700\u8981\u8d70\u7f51\u5173<\/li>\n\n\n\n<li>\u7f51\u5173\u914d\u7f6e\u662f\u5426\u6b63\u786e<\/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\">59 \u9898\uff1aNAT + \/30 \u70b9\u5230\u70b9\u94fe\u8def\u5730\u5740<\/h2>\n\n\n\n<p>\u9898\u76ee\u8bf4\uff1a\u5728\u4e0a\u9898\u56fe\u4e2d\uff0c\u8fde\u63a5 R1\u3001R2\u3001R3 \u4e4b\u95f4\u7684\u70b9\u5230\u70b9\u94fe\u8def\u4f7f\u7528\u5730\u5740 <code>201.1.3.x\/30<\/code>\u3002<br>\u5f53 H3 \u8bbf\u95ee Web \u670d\u52a1\u5668 S \u65f6\uff0cR2 \u8f6c\u53d1\u51fa\u53bb\u7684\u5c01\u88c5 HTTP \u8bf7\u6c42\u62a5\u6587\u7684 IP \u5206\u7ec4\uff0c\u6e90 IP \u548c\u76ee\u7684 IP \u5206\u522b\u662f\u4ec0\u4e48\u3002<\/p>\n\n\n\n<p>\u9009\u9879\u4e2d\u5173\u952e\u662f\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>A. 192.168.3.251\uff0c130.18.10.1<\/li>\n\n\n\n<li>B. 192.168.3.251\uff0c201.1.3.9<\/li>\n\n\n\n<li>C. 201.1.3.8\uff0c130.18.10.1<\/li>\n\n\n\n<li>D. 201.1.3.10\uff0c130.18.10.1<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u672c\u9898\u7ed3\u8bba<\/h3>\n\n\n\n<p>\u9009 <strong>D<\/strong>\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u672c\u9898\u8003\u67e5\u4ec0\u4e48<\/h3>\n\n\n\n<p>\u8fd9\u9898\u53e0\u4e86\u4e24\u4e2a\u9ad8\u9891\u8003\u70b9\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><code>\/30<\/code> \u70b9\u5230\u70b9\u94fe\u8def\u5730\u5740\u600e\u4e48\u5206<\/li>\n\n\n\n<li>NAT \u8f6c\u6362\u540e IP \u5730\u5740\u600e\u4e48\u53d8<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b2c\u4e00\u6b65\uff1a\u5148\u7b97 \/30<\/h3>\n\n\n\n<p><code>\/30<\/code> \u4e00\u4e2a\u5b50\u7f51\u603b\u5171 4 \u4e2a\u5730\u5740\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>1 \u4e2a\u7f51\u7edc\u5730\u5740<\/li>\n\n\n\n<li>2 \u4e2a\u53ef\u7528\u4e3b\u673a\u5730\u5740<\/li>\n\n\n\n<li>1 \u4e2a\u5e7f\u64ad\u5730\u5740<\/li>\n<\/ul>\n\n\n\n<p>\u9898\u56fe\u91cc\u5df2\u7ecf\u7ed9\u51fa\u4e86\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>R3 \u4e00\u4fa7\u662f <code>201.1.3.1<\/code><\/li>\n\n\n\n<li>R1 \u4e00\u4fa7\u662f <code>201.1.3.9<\/code><\/li>\n<\/ul>\n\n\n\n<p>\u90a3\u5c31\u80fd\u53cd\u63a8\u51fa\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>201.1.3.1<\/code> \u5c5e\u4e8e <code>201.1.3.0\/30<\/code>\uff0c\u8fd9\u7ec4\u53ef\u7528\u4e3b\u673a\u5730\u5740\u662f <code>.1<\/code> \u548c <code>.2<\/code><br>\u6240\u4ee5 R2 \u8fde R3 \u90a3\u4e00\u4fa7\u5f88\u53ef\u80fd\u662f <code>201.1.3.2<\/code><\/li>\n\n\n\n<li><code>201.1.3.9<\/code> \u5c5e\u4e8e <code>201.1.3.8\/30<\/code>\uff0c\u8fd9\u7ec4\u53ef\u7528\u4e3b\u673a\u5730\u5740\u662f <code>.9<\/code> \u548c <code>.10<\/code><br>\u6240\u4ee5 R2 \u8fde R1 \u90a3\u4e00\u4fa7\u5c31\u662f <code>201.1.3.10<\/code><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b2c\u4e8c\u6b65\uff1a\u770b NAT<\/h3>\n\n\n\n<p>H3 \u7684\u79c1\u6709\u5730\u5740\u662f <code>192.168.3.251<\/code>\u3002<br>\u5b83\u8981\u53bb\u8bbf\u95ee Web \u670d\u52a1\u5668 <code>130.18.10.1<\/code>\u3002<\/p>\n\n\n\n<p>\u7ecf\u8fc7 R2 \u505a NAT \u540e\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u6e90 IP<\/strong> \u4e0d\u518d\u662f\u79c1\u7f51\u5730\u5740 <code>192.168.3.251<\/code><\/li>\n\n\n\n<li>\u4f1a\u6539\u6210 R2 \u5bf9\u5916\u90a3\u4e00\u4fa7\u7684\u53ef\u516c\u7f51\u8def\u7531\u5730\u5740\uff0c\u5373 <code>201.1.3.10<\/code><\/li>\n\n\n\n<li><strong>\u76ee\u7684 IP<\/strong> \u8fd8\u662f Web \u670d\u52a1\u5668\u5730\u5740 <code>130.18.10.1<\/code><\/li>\n<\/ul>\n\n\n\n<p>\u6240\u4ee5\u7b54\u6848\u662f\uff1a<\/p>\n\n\n\n<p><code>201.1.3.10\uff0c130.18.10.1<\/code><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u6613\u9519\u70b9<\/h3>\n\n\n\n<p>\u6700\u5e38\u9519\u7684\u6709\u4e24\u4e2a\uff1a<\/p>\n\n\n\n<p>\u7b2c\u4e00\u79cd\u9519\u6cd5\uff1a\u628a\u6e90 IP \u8fd8\u5199\u6210 H3 \u7684\u79c1\u7f51\u5730\u5740\u3002<br>\u8fd9\u7b49\u4e8e\u6ca1\u7406\u89e3 NAT\u3002<\/p>\n\n\n\n<p>\u7b2c\u4e8c\u79cd\u9519\u6cd5\uff1a\u628a\u76ee\u7684 IP \u5199\u6210\u4e0b\u4e00\u8df3\u8def\u7531\u5668\u5730\u5740\u3002<br>\u8fd9\u662f\u628a\u201cIP \u5c42\u76ee\u7684\u5730\u5740\u201d\u548c\u201c\u94fe\u8def\u5c42\u4e0b\u4e00\u8df3\u201d\u6df7\u4e86\u3002<br>IP \u5206\u7ec4\u7684\u76ee\u7684\u5730\u5740\u59cb\u7ec8\u662f\u6700\u7ec8\u76ee\u7684\u4e3b\u673a\uff0c\u8f6c\u53d1\u8fc7\u7a0b\u4e2d\u53d8\u7684\u662f<strong>\u94fe\u8def\u5c42\u5c01\u88c5<\/strong>\uff0c\u4e0d\u662f\u6bcf\u4e00\u8df3\u90fd\u6539 IP \u76ee\u7684\u5730\u5740\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u540c\u7c7b\u9898\u5feb\u901f\u8bc6\u522b<\/h3>\n\n\n\n<p>\u770b\u5230\u201c\u8bbf\u95ee Internet + \u79c1\u7f51\u5730\u5740 + NAT + \u8def\u7531\u5668\u201d\uff0c\u5c31\u8981\u7acb\u523b\u60f3\u5230\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u6e90 IP \u53ef\u80fd\u88ab NAT \u6539\u5199<\/li>\n\n\n\n<li>\u76ee\u7684 IP \u4ecd\u7136\u662f\u6700\u7ec8\u670d\u52a1\u5668\u5730\u5740<\/li>\n\n\n\n<li>\u4e0b\u4e00\u8df3\u8def\u7531\u5668\u5730\u5740\u4e0d\u662f IP \u5206\u7ec4\u76ee\u7684\u5730\u5740<\/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\">60 \u9898\uff1a\u5212\u5206\u5b50\u7f51\u540e\uff0c\u6bcf\u4e2a\u5b50\u7f51\u6700\u591a\u80fd\u5206\u591a\u5c11\u4e2a\u4e3b\u673a\u5730\u5740<\/h2>\n\n\n\n<p>\u9898\u76ee\uff1a\u5c06 <code>21.3.0.0\/16<\/code> \u5212\u5206\u4e3a 128 \u4e2a\u89c4\u6a21\u76f8\u540c\u7684\u5b50\u7f51\uff0c\u6bcf\u4e2a\u5b50\u7f51\u53ef\u5206\u914d\u7684\u6700\u5927 IP \u5730\u5740\u4e2a\u6570\u662f\uff1f<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u672c\u9898\u7ed3\u8bba<\/h3>\n\n\n\n<p>\u9009 <strong>C\uff0c510<\/strong>\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u672c\u9898\u8003\u67e5\u4ec0\u4e48<\/h3>\n\n\n\n<p>\u8fd9\u662f\u6807\u51c6\u7684\u201c<strong>\u501f\u4f4d\u5212\u5206\u5b50\u7f51 + \u4e3b\u673a\u6570\u8ba1\u7b97<\/strong>\u201d\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u600e\u4e48\u505a<\/h3>\n\n\n\n<p>\u539f\u7f51\u7edc\u662f <code>\/16<\/code>\u3002<br>\u8981\u5212\u6210 128 \u4e2a\u5b50\u7f51\uff0c128 = 2^7\uff0c\u6240\u4ee5\u8981\u501f 7 \u4f4d\u3002<\/p>\n\n\n\n<p>\u65b0\u524d\u7f00\u957f\u5ea6\u53d8\u6210\uff1a<\/p>\n\n\n\n<p><code>\/16 + 7 = \/23<\/code><\/p>\n\n\n\n<p>\u4e8e\u662f\u6bcf\u4e2a\u5b50\u7f51\u8fd8\u5269\u4e0b\u7684\u4e3b\u673a\u4f4d\u6570\u662f\uff1a<\/p>\n\n\n\n<p><code>32 - 23 = 9<\/code><\/p>\n\n\n\n<p>\u6bcf\u4e2a\u5b50\u7f51\u603b\u5730\u5740\u6570\uff1a<\/p>\n\n\n\n<p><code>2^9 = 512<\/code><\/p>\n\n\n\n<p>\u5176\u4e2d\u53ef\u5206\u914d\u7ed9\u4e3b\u673a\u7684\u5730\u5740\u6570\uff1a<\/p>\n\n\n\n<p><code>512 - 2 = 510<\/code><\/p>\n\n\n\n<p>\u8981\u51cf\u53bb\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>1 \u4e2a\u7f51\u7edc\u5730\u5740<\/li>\n\n\n\n<li>1 \u4e2a\u5e7f\u64ad\u5730\u5740<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u6613\u9519\u70b9<\/h3>\n\n\n\n<p>\u6709\u4e9b\u9898\u4f1a\u95ee\u201cIP \u5730\u5740\u6570\u201d\u8fd8\u662f\u201c\u53ef\u5206\u914d IP \u5730\u5740\u6570\u201d\u3002<br>\u8fd9\u4e24\u4e2a\u4e0d\u4e00\u6837\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u603b IP \u5730\u5740\u6570\uff1a2^\u4e3b\u673a\u4f4d<\/li>\n\n\n\n<li>\u53ef\u5206\u914d\u4e3b\u673a\u5730\u5740\u6570\uff1a2^\u4e3b\u673a\u4f4d &#8211; 2<\/li>\n<\/ul>\n\n\n\n<p>\u672c\u9898\u95ee\u7684\u662f\u201c\u53ef\u5206\u914d\u7684\u6700\u5927 IP \u5730\u5740\u4e2a\u6570\u201d\uff0c\u5b9e\u9645\u5c31\u662f\u4e3b\u673a\u53ef\u7528\u5730\u5740\u6570\uff0c\u6240\u4ee5\u8981\u51cf 2\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">61 \u9898\uff1a\u7279\u6b8a IP \u5730\u5740<\/h2>\n\n\n\n<p>\u9898\u76ee\u95ee\uff1a\u4e0b\u5217 IP \u5730\u5740\u4e2d\uff0c\u53ea\u80fd\u4f5c\u4e3a IP \u5206\u7ec4\u7684\u6e90 IP \u5730\u5740\u4f46\u4e0d\u80fd\u4f5c\u4e3a\u76ee\u7684 IP \u5730\u5740\u7684\u662f\u54ea\u4e00\u4e2a\uff1f<\/p>\n\n\n\n<p>\u9009\u9879\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>A. 0.0.0.0<\/li>\n\n\n\n<li>B. 127.0.0.1<\/li>\n\n\n\n<li>C. 200.10.10.3<\/li>\n\n\n\n<li>D. 255.255.255.255<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u672c\u9898\u7ed3\u8bba<\/h3>\n\n\n\n<p>\u9009 <strong>A\uff0c0.0.0.0<\/strong>\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u672c\u9898\u8003\u67e5\u4ec0\u4e48<\/h3>\n\n\n\n<p>\u8003\u7684\u662f<strong>\u7279\u6b8a IP \u5730\u5740\u7684\u542b\u4e49\u548c\u4f7f\u7528\u573a\u666f<\/strong>\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u4e3a\u4ec0\u4e48\u662f A<\/h3>\n\n\n\n<p><code>0.0.0.0<\/code> \u8868\u793a\u201c\u672c\u673a\u5f53\u524d\u8fd8\u4e0d\u77e5\u9053\u81ea\u5df1\u7684 IP \u5730\u5740\u201d\u3002<br>\u5178\u578b\u573a\u666f\u662f\u4e3b\u673a\u521a\u542f\u52a8\uff0c\u7528 DHCP \u8bf7\u6c42\u5730\u5740\u65f6\uff0c\u53ef\u4ee5\u628a\u81ea\u5df1\u6e90\u5730\u5740\u5199\u6210 <code>0.0.0.0<\/code>\u3002<br>\u4f46\u5b83\u4e0d\u80fd\u4f5c\u4e3a\u4e00\u4e2a\u6b63\u5e38\u7684\u76ee\u7684\u5730\u5740\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u5176\u4ed6\u9009\u9879\u4e3a\u4ec0\u4e48\u4e0d\u5bf9<\/h3>\n\n\n\n<p><code>127.0.0.1<\/code> \u662f\u56de\u73af\u5730\u5740\uff0c\u53ef\u4ee5\u4f5c\u4e3a\u672c\u673a\u6d4b\u8bd5\u901a\u4fe1\u7684\u76ee\u7684\u5730\u5740\u3002<br><code>200.10.10.3<\/code> \u662f\u666e\u901a\u5355\u64ad\u5730\u5740\uff0c\u5f53\u7136\u53ef\u4ee5\u4f5c\u4e3a\u76ee\u7684\u5730\u5740\u3002<br><code>255.255.255.255<\/code> \u662f\u53d7\u9650\u5e7f\u64ad\u5730\u5740\uff0c\u5b83\u6070\u6070\u662f\u4e00\u4e2a\u5178\u578b\u7684<strong>\u76ee\u7684\u5730\u5740<\/strong>\uff0c\u4e0d\u80fd\u4f5c\u4e3a\u6b63\u5e38\u6e90\u5730\u5740\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u8fd9\u9898\u7684\u9ad8\u9891\u8bb0\u5fc6<\/h3>\n\n\n\n<p>\u51e0\u4e2a\u6700\u5e38\u8003\u7684\u7279\u6b8a\u5730\u5740\u6700\u597d\u76f4\u63a5\u8bb0\u4f4f\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>0.0.0.0<\/code>\uff1a\u672a\u77e5\u672c\u673a\uff0c\u53ea\u80fd\u4f5c\u6e90\uff0c\u4e0d\u80fd\u4f5c\u6b63\u5e38\u76ee\u7684<\/li>\n\n\n\n<li><code>127.0.0.1<\/code>\uff1a\u56de\u73af\u6d4b\u8bd5<\/li>\n\n\n\n<li><code>255.255.255.255<\/code>\uff1a\u53d7\u9650\u5e7f\u64ad\uff0c\u4f5c\u76ee\u7684<\/li>\n\n\n\n<li>\u4e3b\u673a\u4f4d\u5168 0\uff1a\u7f51\u7edc\u5730\u5740<\/li>\n\n\n\n<li>\u4e3b\u673a\u4f4d\u5168 1\uff1a\u76f4\u63a5\u5e7f\u64ad\u5730\u5740<\/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\">62 \u9898\uff1a\u8def\u7531\u805a\u5408<\/h2>\n\n\n\n<p>\u9898\u76ee\u7ed9 4 \u6761\u540c\u4e00\u8f6c\u53d1\u63a5\u53e3\u7684\u8def\u7531\u8868\u9879\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>35.230.32.0\/21<\/li>\n\n\n\n<li>35.230.40.0\/21<\/li>\n\n\n\n<li>35.230.48.0\/21<\/li>\n\n\n\n<li>35.230.56.0\/21<\/li>\n<\/ul>\n\n\n\n<p>\u95ee\u805a\u5408\u540e\u7684\u76ee\u7684\u7f51\u7edc\u5730\u5740\u662f\u4ec0\u4e48\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u672c\u9898\u7ed3\u8bba<\/h3>\n\n\n\n<p>\u9009 <strong>C\uff0c35.230.32.0\/19<\/strong>\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u672c\u9898\u8003\u67e5\u4ec0\u4e48<\/h3>\n\n\n\n<p>\u8fd9\u5c31\u662f<strong>CIDR \u8def\u7531\u805a\u5408<\/strong>\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u600e\u4e48\u505a<\/h3>\n\n\n\n<p>\u5148\u770b <code>\/21<\/code> \u7684\u5757\u5927\u5c0f\u3002<\/p>\n\n\n\n<p><code>\/21<\/code> \u8bf4\u660e\u524d 21 \u4f4d\u56fa\u5b9a\uff0c\u4e5f\u5c31\u662f\u7b2c\u4e09\u4e2a\u5b57\u8282\u53ea\u5269 3 \u4f4d\u4e3b\u673a\u90e8\u5206\u3002<br>\u5757\u5927\u5c0f\u662f\uff1a<\/p>\n\n\n\n<p><code>256 - 248 = 8<\/code><\/p>\n\n\n\n<p>\u6240\u4ee5\u8fd9\u56db\u4e2a\u7f51\u6bb5\u5206\u522b\u8986\u76d6\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>32~39<\/li>\n\n\n\n<li>40~47<\/li>\n\n\n\n<li>48~55<\/li>\n\n\n\n<li>56~63<\/li>\n<\/ul>\n\n\n\n<p>\u5408\u8d77\u6765\u6b63\u597d\u662f\u7b2c\u4e09\u4e2a\u5b57\u8282 <code>32~63<\/code>\u3002<\/p>\n\n\n\n<p>\u800c <code>\/19<\/code> \u7684\u5757\u5927\u5c0f\u662f 32\uff0c\u7b2c\u4e09\u4e2a\u5b57\u8282\u7684\u8d77\u70b9\u53ea\u80fd\u662f\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>0<\/li>\n\n\n\n<li>32<\/li>\n\n\n\n<li>64<\/li>\n\n\n\n<li>96<\/li>\n\n\n\n<li>&#8230;<\/li>\n<\/ul>\n\n\n\n<p>\u5176\u4e2d <code>32~63<\/code> \u521a\u597d\u5bf9\u5e94\uff1a<\/p>\n\n\n\n<p><code>35.230.32.0\/19<\/code><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u4e5f\u53ef\u4ee5\u7528\u4e8c\u8fdb\u5236\u770b<\/h3>\n\n\n\n<p>\u7b2c\u4e09\u4e2a\u5b57\u8282\u5206\u522b\u662f\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>32 = 00100000<\/li>\n\n\n\n<li>40 = 00101000<\/li>\n\n\n\n<li>48 = 00110000<\/li>\n\n\n\n<li>56 = 00111000<\/li>\n<\/ul>\n\n\n\n<p>\u5b83\u4eec\u5171\u540c\u7684\u9ad8 3 \u4f4d\u90fd\u662f <code>001<\/code>\uff0c\u524d\u4e24\u6bb5\u516b\u4f4d\u518d\u52a0\u8fd9 3 \u4f4d\uff0c\u4e00\u5171\u5c31\u662f 19 \u4f4d\u524d\u7f00\uff0c\u6240\u4ee5\u662f <code>\/19<\/code>\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u6613\u9519\u70b9<\/h3>\n\n\n\n<p>\u6700\u5e38\u89c1\u9519\u8bef\u662f\u53ea\u770b\u201c\u8fde\u7eed\u201d\uff0c\u6ca1\u770b\u201c\u662f\u5426\u80fd\u6309 2 \u7684\u5e42\u6b21\u805a\u5408\u201d\u3002<br>\u8def\u7531\u805a\u5408\u5fc5\u987b\u6ee1\u8db3\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u7f51\u6bb5\u8fde\u7eed<\/li>\n\n\n\n<li>\u6570\u91cf\u662f 2 \u7684\u5e42<\/li>\n\n\n\n<li>\u805a\u5408\u540e\u7684\u8d77\u59cb\u5730\u5740\u8981\u5bf9\u9f50<\/li>\n<\/ol>\n\n\n\n<p>\u8fd9\u9898\u56db\u4e2a <code>\/21<\/code> \u8fde\u7eed\uff0c\u4e14 4 = 2^2\uff0c\u53ef\u4ee5\u7ee7\u7eed\u5408\u6210\u4e00\u4e2a <code>\/19<\/code>\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\/63-768x1024.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\/63-768x1024.jpg\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-1955\"  sizes=\"auto, (max-width: 768px) 100vw, 768px\" \/><\/div><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">63 \u9898\uff1a\u8de8\u7f51\u6bb5\u53d1\u9001\u65f6\uff0cMAC \u5730\u5740\u600e\u4e48\u53d8<\/h2>\n\n\n\n<p>\u56fe\u4e2d\u4fe1\u606f\u662f\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>H1\uff1aIP <code>192.168.3.2<\/code>\uff0cMAC <code>00-1a-2b-3c-4d-52<\/code><\/li>\n\n\n\n<li>\u8def\u7531\u5668\u5de6\u63a5\u53e3\uff1aIP <code>192.168.3.1<\/code>\uff0cMAC <code>00-1a-2b-3c-4d-51<\/code><\/li>\n\n\n\n<li>\u8def\u7531\u5668\u53f3\u63a5\u53e3\uff1aIP <code>192.168.4.1<\/code>\uff0cMAC <code>00-a1-b2-c3-d4-61<\/code><\/li>\n\n\n\n<li>H2\uff1aIP <code>192.168.4.2<\/code>\uff0cMAC <code>00-a1-b2-c3-d4-62<\/code><\/li>\n<\/ul>\n\n\n\n<p>\u95ee\uff1aH1 \u53d1\u7ed9 H2 \u7684 IP \u5206\u7ec4 P \u4e2d\uff0c<br>H1 \u53d1\u51fa\u7684\u4ee5\u592a\u7f51\u5e27\u7684<strong>\u76ee\u7684 MAC<\/strong>\uff0c\u4ee5\u53ca H2 \u6536\u5230\u7684\u5c01\u88c5 P \u7684\u4ee5\u592a\u7f51\u5e27\u7684<strong>\u6e90 MAC<\/strong>\u5206\u522b\u662f\u4ec0\u4e48\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u672c\u9898\u7ed3\u8bba<\/h3>\n\n\n\n<p>\u9009 <strong>D<\/strong>\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>H1 \u53d1\u51fa\u65f6\u7684\u5e27\u76ee\u7684 MAC = <code>00-1a-2b-3c-4d-51<\/code><\/li>\n\n\n\n<li>H2 \u6536\u5230\u65f6\u7684\u5e27\u6e90 MAC = <code>00-a1-b2-c3-d4-61<\/code><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u672c\u9898\u8003\u67e5\u4ec0\u4e48<\/h3>\n\n\n\n<p>\u8fd9\u662f\u7f51\u7edc\u5c42\u548c\u6570\u636e\u94fe\u8def\u5c42\u6700\u7ecf\u5178\u7684\u7ed3\u5408\u9898\uff0c\u6838\u5fc3\u5c31\u662f\u4e00\u53e5\u8bdd\uff1a<\/p>\n\n\n\n<p><strong>IP \u5730\u5740\u7aef\u5230\u7aef\u57fa\u672c\u4e0d\u53d8\uff0cMAC \u5730\u5740\u9010\u8df3\u6539\u53d8\u3002<\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u600e\u4e48\u505a<\/h3>\n\n\n\n<p>H1 \u8981\u53d1\u7ed9 H2\u3002<br>\u5148\u770b IP\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>H1 \u5728 <code>192.168.3.0\/24<\/code> \u8fd9\u4e00\u4fa7<\/li>\n\n\n\n<li>H2 \u5728 <code>192.168.4.0\/24<\/code> \u8fd9\u4e00\u4fa7<\/li>\n<\/ul>\n\n\n\n<p>\u4e0d\u5728\u540c\u4e00\u7f51\u6bb5\uff0c\u6240\u4ee5 H1 \u4e0d\u4f1a\u76f4\u63a5\u628a\u5e27\u53d1\u7ed9 H2 \u7684 MAC\uff0c\u800c\u662f\u5148\u53d1\u7ed9<strong>\u9ed8\u8ba4\u7f51\u5173<\/strong>\uff0c\u4e5f\u5c31\u662f\u8def\u7531\u5668\u5de6\u63a5\u53e3\u3002<\/p>\n\n\n\n<p>\u6240\u4ee5 H1 \u53d1\u51fa\u7684\u4ee5\u592a\u7f51\u5e27\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u6e90 MAC\uff1aH1 \u81ea\u5df1\u7684 MAC <code>00-1a-2b-3c-4d-52<\/code><\/li>\n\n\n\n<li>\u76ee\u7684 MAC\uff1a\u8def\u7531\u5668\u5de6\u63a5\u53e3 MAC <code>00-1a-2b-3c-4d-51<\/code><\/li>\n<\/ul>\n\n\n\n<p>\u8def\u7531\u5668\u6536\u5230\u540e\uff0c\u62c6\u6389\u539f\u6765\u7684\u94fe\u8def\u5c42\u9996\u90e8\uff0c\u91cd\u65b0\u5c01\u88c5\uff0c\u4ece\u53f3\u63a5\u53e3\u8f6c\u53d1\u5230 H2 \u90a3\u4e2a\u7f51\u6bb5\u3002<br>\u4e8e\u662f H2 \u6536\u5230\u7684\u5e27\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u6e90 MAC\uff1a\u8def\u7531\u5668\u53f3\u63a5\u53e3 MAC <code>00-a1-b2-c3-d4-61<\/code><\/li>\n\n\n\n<li>\u76ee\u7684 MAC\uff1aH2 \u7684 MAC <code>00-a1-b2-c3-d4-62<\/code><\/li>\n<\/ul>\n\n\n\n<p>\u9898\u76ee\u53ea\u95ee\u4e24\u4e2a\u503c\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>H1 \u53d1\u51fa\u7684\u5e27\u76ee\u7684 MAC\uff1a<code>00-1a-2b-3c-4d-51<\/code><\/li>\n\n\n\n<li>H2 \u6536\u5230\u7684\u5e27\u6e90 MAC\uff1a<code>00-a1-b2-c3-d4-61<\/code><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u6613\u9519\u70b9<\/h3>\n\n\n\n<p>\u8fd9\u9898\u6700\u5bb9\u6613\u9519\u6210 B\uff0c\u56e0\u4e3a\u5f88\u591a\u4eba\u628a\u201cH2 \u7684 MAC\u201d\u5f53\u6210\u4e86 H1 \u53d1\u5e27\u65f6\u7684\u76ee\u7684 MAC\u3002<br>\u8fd9\u662f\u5178\u578b\u7684\u628a<strong>\u8de8\u7f51\u6bb5\u901a\u4fe1<\/strong>\u6309<strong>\u540c\u7f51\u6bb5\u76f4\u53d1<\/strong>\u6765\u505a\u4e86\u3002<\/p>\n\n\n\n<p>\u53ea\u8981\u662f\u8de8\u7f51\u6bb5\uff0c\u7b2c\u4e00\u8df3\u5e27\u7684\u76ee\u7684 MAC \u4e00\u5b9a\u662f<strong>\u7f51\u5173\u63a5\u53e3\u7684 MAC<\/strong>\uff0c\u4e0d\u662f\u6700\u7ec8\u4e3b\u673a\u7684 MAC\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u4e00\u53e5\u8bdd\u8bb0\u5fc6<\/h3>\n\n\n\n<p>\u540c\u7f51\u6bb5\uff1a\u627e\u5bf9\u65b9 MAC<br>\u4e0d\u540c\u7f51\u6bb5\uff1a\u627e\u7f51\u5173 MAC<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">57 \u5230 63 \u9898\u6574\u4f53\u8003\u4e86\u54ea\u4e9b\u77e5\u8bc6\u70b9<\/h2>\n\n\n\n<p>\u628a\u8fd9\u51e0\u9898\u4e32\u8d77\u6765\u770b\uff0c\u8003\u70b9\u975e\u5e38\u96c6\u4e2d\uff0c\u57fa\u672c\u5c31\u662f IPv4 \u7ae0\u8282\u7684\u4e3b\u7ebf\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b2c\u4e00\u7ec4\uff1a\u8def\u7531\u8f6c\u53d1\u4e0e\u8def\u7531\u8868<\/h3>\n\n\n\n<p>57 \u9898\u8003\u7684\u662f\u6700\u957f\u524d\u7f00\u5339\u914d\u3002<br>62 \u9898\u8003\u7684\u662f\u8def\u7531\u805a\u5408\u3002<br>\u8fd9\u4e24\u9898\u5176\u5b9e\u662f\u4e00\u5bf9\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u4e00\u4e2a\u8003\u201c\u6536\u5230\u5206\u7ec4\u540e\u600e\u4e48\u9009\u8def\u7531\u201d<\/li>\n\n\n\n<li>\u4e00\u4e2a\u8003\u201c\u5982\u4f55\u628a\u591a\u6761\u8def\u7531\u538b\u7f29\u6210\u4e00\u6761\u201d<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b2c\u4e8c\u7ec4\uff1a\u5b50\u7f51\u5212\u5206\u4e0e\u4e3b\u673a\u5bfb\u5740<\/h3>\n\n\n\n<p>58\u300160\u300165 \u8fd9\u4e00\u7c7b\u662f\u4e00\u6761\u7ebf\uff0c\u4f46\u4f60\u8fd9\u6b21\u95ee\u5230\u7684\u662f 58 \u548c 60\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>58 \u9898\u8003\u201c\u4e3b\u673a\u6839\u636e\u63a9\u7801\u5224\u65ad\u540c\u7f51\u6bb5\u8fd8\u662f\u5f02\u7f51\u6bb5\u201d<\/li>\n\n\n\n<li>60 \u9898\u8003\u201c\u501f\u4f4d\u5212\u5206\u5b50\u7f51\u540e\u6bcf\u4e2a\u5b50\u7f51\u6709\u591a\u5c11\u4e3b\u673a\u5730\u5740\u201d<\/li>\n<\/ul>\n\n\n\n<p>\u8fd9\u7c7b\u9898\u6700\u6838\u5fc3\u7684\u662f\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u524d\u7f00\u957f\u5ea6\u600e\u4e48\u7b97<\/li>\n\n\n\n<li>\u4e00\u4e2a\u5b50\u7f51\u7684\u5757\u5927\u5c0f\u600e\u4e48\u7b97<\/li>\n\n\n\n<li>\u4e3b\u673a\u4f4d\u6709\u51e0\u4f4d<\/li>\n\n\n\n<li>\u662f\u5426\u9700\u8981\u8d70\u9ed8\u8ba4\u7f51\u5173<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b2c\u4e09\u7ec4\uff1a\u7279\u6b8a IP \u5730\u5740<\/h3>\n\n\n\n<p>61 \u9898\u5c31\u662f\u7eaf\u8003\u8bb0\u5fc6\uff0c\u4f46\u4e0d\u80fd\u6b7b\u8bb0\uff0c\u8981\u548c\u5e94\u7528\u573a\u666f\u6302\u94a9\u3002<br>\u6bd4\u5982 <code>0.0.0.0<\/code> \u51fa\u73b0\u5728 DHCP \u521d\u59cb\u9636\u6bb5\uff0c<code>255.255.255.255<\/code> \u662f\u5e7f\u64ad\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b2c\u56db\u7ec4\uff1aNAT \u4e0e\u5206\u7ec4\u8f6c\u53d1<\/h3>\n\n\n\n<p>59 \u9898\u8003\u5f97\u975e\u5e38\u5178\u578b\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u70b9\u5230\u70b9\u94fe\u8def\u5e38\u7528 <code>\/30<\/code><\/li>\n\n\n\n<li>NAT \u53ea\u6539\u6e90\u5730\u5740\uff0c\u4e0d\u6539\u6700\u7ec8\u76ee\u7684\u5730\u5740<\/li>\n\n\n\n<li>\u76ee\u7684\u5730\u5740\u59cb\u7ec8\u662f\u6700\u7ec8\u670d\u52a1\u5668\u5730\u5740\uff0c\u4e0d\u662f\u4e0b\u4e00\u8df3\u5730\u5740<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b2c\u4e94\u7ec4\uff1aMAC \u5730\u5740\u4e0e IP \u5730\u5740\u7684\u5206\u5de5<\/h3>\n\n\n\n<p>63 \u9898\u662f\u8fd9\u90e8\u5206\u7684\u9ad8\u9891\u9677\u9631\u9898\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>IP \u5730\u5740\u51b3\u5b9a\u6700\u7ec8\u9001\u5230\u54ea\u91cc<\/li>\n\n\n\n<li>MAC \u5730\u5740\u53ea\u8d1f\u8d23\u5f53\u524d\u94fe\u8def\u8fd9\u4e00\u8df3<\/li>\n\n\n\n<li>\u4ea4\u6362\u673a\u4e0d\u6539 MAC<\/li>\n\n\n\n<li>\u8def\u7531\u5668\u8f6c\u53d1\u65f6\u4f1a\u91cd\u65b0\u5c01\u88c5\u94fe\u8def\u5c42\u5e27\uff0c\u56e0\u6b64 MAC \u4f1a\u53d8<\/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\u7ec4\u9898\u6700\u5bb9\u6613\u6df7\u6dc6\u7684\u5730\u65b9<\/h2>\n\n\n\n<p>\u8fd9\u51e0\u9898\u653e\u5728\u4e00\u8d77\uff0c\u6700\u5bb9\u6613\u6df7\u7684\u662f\u4e0b\u9762\u51e0\u7ec4\u6982\u5ff5\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">1. \u903b\u8f91\u5b50\u7f51 \u548c \u7269\u7406\u8fde\u63a5<\/h3>\n\n\n\n<p>58 \u9898\u6700\u5bb9\u6613\u683d\u5728\u8fd9\u91cc\u3002<br>\u201c\u63a5\u5728\u540c\u4e00\u4e2a\u4ea4\u6362\u673a\/\u96c6\u7ebf\u5668\u4e0a\u201d\u53ea\u8bf4\u660e\u7269\u7406\u4e0a\u8fde\u901a\uff0c\u4e0d\u4ee3\u8868\u4ece IP \u5c42\u770b\u5c31\u662f\u540c\u4e00\u5b50\u7f51\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">2. \u76ee\u7684 IP \u548c \u4e0b\u4e00\u8df3<\/h3>\n\n\n\n<p>59 \u9898\u6700\u5bb9\u6613\u6df7\u3002<br>IP \u5206\u7ec4\u7684\u76ee\u7684\u5730\u5740\u662f\u6700\u7ec8\u4e3b\u673a\u5730\u5740\uff1b\u4e0b\u4e00\u8df3\u53ea\u662f\u94fe\u8def\u5c42\u8981\u4ea4\u7ed9\u8c01\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">3. IP \u5730\u5740 \u548c MAC \u5730\u5740<\/h3>\n\n\n\n<p>63 \u9898\u6700\u5bb9\u6613\u6df7\u3002<br>IP \u662f\u7aef\u5230\u7aef\uff0cMAC \u662f\u9010\u8df3\u3002<br>\u8de8\u7f51\u6bb5\u901a\u4fe1\u65f6\uff0c\u7b2c\u4e00\u8df3\u627e\u7f51\u5173 MAC\uff0c\u4e0d\u662f\u627e\u5bf9\u7aef\u4e3b\u673a MAC\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">4. \u603b\u5730\u5740\u6570 \u548c \u53ef\u5206\u914d\u4e3b\u673a\u5730\u5740\u6570<\/h3>\n\n\n\n<p>60 \u9898\u6700\u5bb9\u6613\u7c97\u5fc3\u3002<br>\u4e3b\u673a\u4f4d\u6709 n \u4f4d\uff0c\u603b\u5730\u5740\u662f 2^n\uff0c\u4f46\u53ef\u5206\u914d\u4e3b\u673a\u5730\u5740\u4e00\u822c\u662f 2^n &#8211; 2\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\u7c7b\u9898\u4ee5\u540e\u600e\u4e48\u66f4\u5feb\u505a<\/h2>\n\n\n\n<p>\u6211\u66f4\u5efa\u8bae\u628a IPv4 \u9898\u6309\u201c\u5224\u65ad\u6d41\u7a0b\u201d\u6765\u505a\uff0c\u800c\u4e0d\u662f\u6309\u77e5\u8bc6\u70b9\u5b64\u7acb\u8bb0\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b2c\u4e00\u6b65\uff1a\u5148\u770b\u662f\u4e0d\u662f\u540c\u4e00\u5b50\u7f51<\/h3>\n\n\n\n<p>\u62ff\u4e3b\u673a IP \u548c\u63a9\u7801\u4e00\u7b97\uff0c\u5c31\u77e5\u9053\u662f\u76f4\u53d1\u8fd8\u662f\u4ea4\u7ed9\u7f51\u5173\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b2c\u4e8c\u6b65\uff1a\u5982\u679c\u8981\u8d70\u7f51\u5173\uff0c\u5c31\u5206\u6e05\u4e24\u5c42<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>IP \u5c42\u76ee\u7684\u5730\u5740\uff1a\u6700\u7ec8\u76ee\u7684\u4e3b\u673a<\/li>\n\n\n\n<li>\u94fe\u8def\u5c42\u76ee\u7684\u5730\u5740\uff1a\u5f53\u524d\u8fd9\u4e00\u8df3\u7684\u4e0b\u4e00\u8df3 MAC<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b2c\u4e09\u6b65\uff1a\u5982\u679c\u9898\u91cc\u51fa\u73b0\u591a\u6761\u8def\u7531<\/h3>\n\n\n\n<p>\u76f4\u63a5\u770b\u6700\u957f\u524d\u7f00\u5339\u914d\uff0c\u4e0d\u770b\u8868\u9879\u5148\u540e\u987a\u5e8f\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b2c\u56db\u6b65\uff1a\u5982\u679c\u9898\u91cc\u51fa\u73b0 NAT<\/h3>\n\n\n\n<p>\u4f18\u5148\u5224\u65ad\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u79c1\u7f51\u5730\u5740\u4f1a\u4e0d\u4f1a\u6539<\/li>\n\n\n\n<li>\u6539\u6210\u54ea\u4e2a\u51fa\u53e3\u5730\u5740<\/li>\n\n\n\n<li>\u76ee\u7684\u5730\u5740\u662f\u5426\u4fdd\u6301\u4e0d\u53d8<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b2c\u4e94\u6b65\uff1a\u5982\u679c\u9898\u91cc\u51fa\u73b0\u5b50\u7f51\u5212\u5206<\/h3>\n\n\n\n<p>\u56fa\u5b9a\u51e0\u4e2a\u52a8\u4f5c\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5148\u770b\u501f\u4e86\u51e0\u4f4d<\/li>\n\n\n\n<li>\u518d\u7b97\u65b0\u524d\u7f00\u957f\u5ea6<\/li>\n\n\n\n<li>\u518d\u7b97\u5757\u5927\u5c0f<\/li>\n\n\n\n<li>\u6700\u540e\u7b97\u53ef\u7528\u4e3b\u673a\u6570<\/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\/64-768x1024.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\/64-768x1024.jpg\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-1957\"  sizes=\"auto, (max-width: 768px) 100vw, 768px\" \/><\/div><\/figure>\n\n\n\n<p><br>\u8fd9\u51e0\u9898\u672c\u8d28\u4e0a\u90fd\u5728\u8003 IPv4 \u5b50\u7f51\u5212\u5206\u3001CIDR\u3001\u5206\u7247\u3001\u9ed8\u8ba4\u7f51\u5173\u3001NAT \u8fd9\u51e0\u4e2a\u9ad8\u9891\u70b9\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u7b2c64\u9898\uff1a\u628a 101.200.16.0\/20 \u5212\u5206\u4e3a 5 \u4e2a\u5b50\u7f51\uff0c\u6700\u5c0f\u5b50\u7f51\u53ef\u5206\u914d IP \u6570<\/h2>\n\n\n\n<p>\u6b63\u786e\u7b54\u6848\uff1aC\uff0c510<\/p>\n\n\n\n<p>\u8fd9\u9898\u662f\u5178\u578b\u7684\u201c\u7b49\u957f\u5b50\u7f51\u5212\u5206\u201d\u9898\u3002<br>\u539f\u7f51\u7edc\u524d\u7f00\u662f <code>\/20<\/code>\uff0c\u4e3b\u673a\u4f4d\u8fd8\u6709 <code>32 - 20 = 12<\/code> \u4f4d\u3002<\/p>\n\n\n\n<p>\u73b0\u5728\u8981\u5212\u5206\u6210 5 \u4e2a\u5b50\u7f51\uff0c\u5c31\u8981\u4ece\u4e3b\u673a\u4f4d\u91cc\u501f\u4f4d\u4f5c\u4e3a\u5b50\u7f51\u4f4d\u3002<br>\u56e0\u4e3a\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u501f 2 \u4f4d\uff0c\u53ea\u80fd\u5206\u51fa <code>2\u00b2 = 4<\/code> \u4e2a\u5b50\u7f51\uff0c\u4e0d\u591f<\/li>\n\n\n\n<li>\u501f 3 \u4f4d\uff0c\u53ef\u4ee5\u5206\u51fa <code>2\u00b3 = 8<\/code> \u4e2a\u5b50\u7f51\uff0c\u591f\u7528<\/li>\n<\/ul>\n\n\n\n<p>\u6240\u4ee5\u65b0\u524d\u7f00\u53d8\u6210\uff1a<\/p>\n\n\n\n<p><code>\/20 + 3 = \/23<\/code><\/p>\n\n\n\n<p>\u90a3\u4e48\u6bcf\u4e2a\u5b50\u7f51\u7684\u4e3b\u673a\u4f4d\u8fd8\u5269\uff1a<\/p>\n\n\n\n<p><code>32 - 23 = 9<\/code> \u4f4d<\/p>\n\n\n\n<p>\u6bcf\u4e2a\u5b50\u7f51\u53ef\u5206\u914d IP \u6570\uff1a<\/p>\n\n\n\n<p><code>2\u2079 - 2 = 510<\/code><\/p>\n\n\n\n<p>\u6240\u4ee5\u9009 C\u3002<\/p>\n\n\n\n<p>\u8fd9\u9898\u6700\u5bb9\u6613\u9519\u5728\u4e24\u70b9\uff1a<\/p>\n\n\n\n<p>\u7b2c\u4e00\uff0c\u5fd8\u4e86\u201c\u5212\u5206\u4e3a 5 \u4e2a\u5b50\u7f51\u201d\u65f6\u8981\u5148\u7b97\u81f3\u5c11\u501f\u51e0\u4f4d\uff0c\u800c\u4e0d\u662f\u76f4\u63a5\u62ff <code>\/20<\/code> \u53bb\u7b97\u3002<br>\u7b2c\u4e8c\uff0c\u628a\u201c\u53ef\u5206\u914d IP \u6570\u201d\u7b97\u6210 <code>2\u2079 = 512<\/code>\uff0c\u5fd8\u4e86\u51cf\u53bb\u7f51\u7edc\u5730\u5740\u548c\u5e7f\u64ad\u5730\u5740\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u7b2c65\u9898\uff1a\u5df2\u77e5\u4e00\u4e2a\u5b50\u7f51\u662f 192.168.9.128\/26\uff0c\u53e6\u5916\u4e24\u4e2a\u5b50\u7f51\u4e2d\u4e0d\u53ef\u80fd\u7684\u662f\u54ea\u4e00\u4e2a<\/h2>\n\n\n\n<p>\u6b63\u786e\u7b54\u6848\uff1aB\uff0c192.168.9.0\/26<\/p>\n\n\n\n<p>\u8fd9\u9898\u8003\u7684\u662f\u201c\u5b50\u7f51\u4e4b\u95f4\u80fd\u4e0d\u80fd\u62fc\u6210\u540c\u4e00\u4e2a\u7236\u7f51\u7edc\u201d\u3002<\/p>\n\n\n\n<p>\u5df2\u77e5\u4e00\u4e2a\u5b50\u7f51\u662f\uff1a<\/p>\n\n\n\n<p><code>192.168.9.128\/26<\/code><\/p>\n\n\n\n<p>\u5b83\u7684\u5730\u5740\u8303\u56f4\u662f\uff1a<\/p>\n\n\n\n<p><code>192.168.9.128 ~ 192.168.9.191<\/code><\/p>\n\n\n\n<p>\u56e0\u4e3a <code>\/26<\/code> \u7684\u5757\u5927\u5c0f\u662f <code>64<\/code>\u3002<\/p>\n\n\n\n<p>\u73b0\u5728\u770b\u5404\u9009\u9879\u80fd\u4e0d\u80fd\u548c\u5b83\u4e00\u8d77\uff0c\u6700\u7ec8\u6784\u6210\u201c\u67d0\u4e00\u4e2a IP \u7f51\u7edc\u88ab\u5212\u5206\u4e3a 3 \u4e2a\u5b50\u7f51\u201d\u7684\u7ed3\u679c\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">A\uff1a192.168.9.0\/25<\/h3>\n\n\n\n<p><code>192.168.9.0\/25<\/code> \u8303\u56f4\u662f <code>0 ~ 127<\/code><\/p>\n\n\n\n<p>\u518d\u52a0\u4e0a\u5df2\u77e5\u7684 <code>128 ~ 191<\/code><\/p>\n\n\n\n<p>\u5269\u4e0b <code>192 ~ 255<\/code> \u6b63\u597d\u8fd8\u80fd\u662f\u4e00\u4e2a <code>192.168.9.192\/26<\/code><\/p>\n\n\n\n<p>\u8fd9\u6837\u4e09\u4e2a\u5b50\u7f51\u521a\u597d\u62fc\u6210 <code>192.168.9.0\/24<\/code>\uff0c\u6240\u4ee5 A \u53ef\u4ee5\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">B\uff1a192.168.9.0\/26<\/h3>\n\n\n\n<p>\u8303\u56f4\u662f <code>0 ~ 63<\/code><\/p>\n\n\n\n<p>\u5df2\u77e5\u5b50\u7f51\u662f <code>128 ~ 191<\/code><\/p>\n\n\n\n<p>\u8fd9\u4e24\u4e2a\u4e4b\u95f4\u9694\u7740 <code>64 ~ 127<\/code>\uff0c\u540e\u9762\u8fd8\u6709 <code>192 ~ 255<\/code><\/p>\n\n\n\n<p>\u5269\u4f59\u90e8\u5206\u88ab\u5206\u6210\u4e24\u5757\uff0c\u4e0d\u53ef\u80fd\u518d\u7528\u201c\u4e00\u4e2a\u5b50\u7f51\u201d\u8865\u9f50\u3002<br>\u4e5f\u5c31\u662f\u8bf4\uff0c\u4e0d\u53ef\u80fd\u53ea\u9760\u53e6\u5916\u4e00\u4e2a\u5b50\u7f51\u5c31\u548c\u8fd9\u4e24\u4e2a\u4e00\u8d77\u7ec4\u6210\u67d0\u4e2a\u5b8c\u6574\u7236\u7f51\u7edc\u3002<\/p>\n\n\n\n<p>\u6240\u4ee5 B \u4e0d\u53ef\u80fd\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">C\uff1a192.168.9.192\/26<\/h3>\n\n\n\n<p>\u8303\u56f4\u662f <code>192 ~ 255<\/code><\/p>\n\n\n\n<p>\u518d\u914d\u4e0a\u4e00\u4e2a <code>192.168.9.0\/25<\/code>\uff0c\u5c31\u80fd\u548c\u5df2\u77e5\u5b50\u7f51\u4e00\u8d77\u62fc\u6210 <code>192.168.9.0\/24<\/code><\/p>\n\n\n\n<p>\u6240\u4ee5 C \u53ef\u4ee5\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">D\uff1a192.168.9.192\/27<\/h3>\n\n\n\n<p>\u8303\u56f4\u662f <code>192 ~ 223<\/code><\/p>\n\n\n\n<p>\u518d\u8865\u4e00\u4e2a <code>192.168.9.224\/27<\/code><\/p>\n\n\n\n<p>\u8fd9\u65f6\u4e09\u4e2a\u5b50\u7f51\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>192.168.9.128\/26<\/code><\/li>\n\n\n\n<li><code>192.168.9.192\/27<\/code><\/li>\n\n\n\n<li><code>192.168.9.224\/27<\/code><\/li>\n<\/ul>\n\n\n\n<p>\u521a\u597d\u62fc\u6210 <code>192.168.9.128\/25<\/code><\/p>\n\n\n\n<p>\u6240\u4ee5 D \u4e5f\u53ef\u4ee5\u3002<\/p>\n\n\n\n<p>\u56e0\u6b64\u53ea\u6709 B \u4e0d\u53ef\u80fd\uff0c\u9009 B\u3002<\/p>\n\n\n\n<p>\u8fd9\u9898\u7684\u6838\u5fc3\u4e0d\u662f\u6b7b\u7b97\uff0c\u800c\u662f\u770b\u201c\u5269\u4f59\u5730\u5740\u7a7a\u95f4\u80fd\u4e0d\u80fd\u7531\u4e00\u4e2a\u8fde\u7eed\u5757\u8865\u9f50\u6210\u7236\u7f51\u7edc\u201d\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u7b2c66\u9898\uff1aIP \u5206\u7247\uff0c\u6c42\u7b2c 2 \u4e2a\u5206\u7247\u603b\u957f\u5ea6\u548c MF<\/h2>\n\n\n\n<p>\u6b63\u786e\u7b54\u6848\uff1aB\uff0c796\uff0c1<\/p>\n\n\n\n<p>\u5df2\u77e5\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>MTU = 800B<\/li>\n\n\n\n<li>\u539f IP \u6570\u636e\u62a5\u603b\u957f\u5ea6 = 1580B<\/li>\n\n\n\n<li>\u9996\u90e8\u957f\u5ea6 = 20B<\/li>\n<\/ul>\n\n\n\n<p>\u6240\u4ee5\u539f\u59cb\u6570\u636e\u90e8\u5206\u957f\u5ea6\u4e3a\uff1a<\/p>\n\n\n\n<p><code>1580 - 20 = 1560B<\/code><\/p>\n\n\n\n<p>\u5206\u7247\u65f6\uff0c\u6bcf\u4e2a\u5206\u7247\u603b\u957f\u5ea6\u4e0d\u80fd\u8d85\u8fc7 MTU\uff0c\u5373\u4e0d\u80fd\u8d85\u8fc7 800B\u3002<br>\u6bcf\u4e2a\u5206\u7247\u90fd\u6709\u81ea\u5df1\u7684\u9996\u90e8 20B\uff0c\u6240\u4ee5\u6bcf\u7247\u6700\u591a\u80fd\u88c5\u6570\u636e\uff1a<\/p>\n\n\n\n<p><code>800 - 20 = 780B<\/code><\/p>\n\n\n\n<p>\u4f46\u662f\u6ce8\u610f\uff0c\u9664\u6700\u540e\u4e00\u4e2a\u5206\u7247\u5916\uff0c\u6570\u636e\u90e8\u5206\u5fc5\u987b\u662f 8B \u7684\u6574\u6570\u500d\u3002<br>\u56e0\u6b64\u771f\u6b63\u6bcf\u7247\u6700\u591a\u88c5\uff1a<\/p>\n\n\n\n<p><code>floor(780 \/ 8) \u00d7 8 = 776B<\/code><\/p>\n\n\n\n<p>\u4e8e\u662f\u5206\u7247\u60c5\u51b5\u4e3a\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u7b2c1\u7247\uff1a\u6570\u636e 776B\uff0c\u603b\u957f\u5ea6 796B<\/li>\n\n\n\n<li>\u7b2c2\u7247\uff1a\u6570\u636e 776B\uff0c\u603b\u957f\u5ea6 796B<\/li>\n\n\n\n<li>\u7b2c3\u7247\uff1a\u5269\u4f59\u6570\u636e <code>1560 - 776 - 776 = 8B<\/code>\uff0c\u603b\u957f\u5ea6 28B<\/li>\n<\/ul>\n\n\n\n<p>\u7b2c 2 \u4e2a\u5206\u7247\u540e\u9762\u8fd8\u6709\u5206\u7247\uff0c\u6240\u4ee5\uff1a<\/p>\n\n\n\n<p><code>MF = 1<\/code><\/p>\n\n\n\n<p>\u56e0\u6b64\u7b54\u6848\u662f\uff1a<\/p>\n\n\n\n<p>\u603b\u957f\u5ea6\u5b57\u6bb5 = <code>796<\/code>\uff0cMF = <code>1<\/code><\/p>\n\n\n\n<p>\u9009 B\u3002<\/p>\n\n\n\n<p>\u8fd9\u9898\u7684\u4e24\u4e2a\u5751\u7279\u522b\u5e38\u89c1\uff1a<\/p>\n\n\n\n<p>\u7b2c\u4e00\uff0c\u5fd8\u4e86\u201c\u603b\u957f\u5ea6\u201d\u5305\u542b\u9996\u90e8\u3002<br>\u7b2c\u4e8c\uff0c\u5fd8\u4e86\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>\u53ea\u8981\u770b\u5230 IP \u5206\u7247\u9898\uff0c\u8111\u5b50\u91cc\u5148\u56fa\u5b9a\u4e00\u4e2a\u6a21\u677f\uff1a<\/p>\n\n\n\n<p><code>\u6bcf\u7247\u6700\u5927\u6570\u636e = floor((MTU - \u9996\u90e8) \/ 8) \u00d7 8<\/code><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u7b2c67\u9898\uff1a\u6c42\u7f51\u7edc\u5730\u5740<\/h2>\n\n\n\n<p>\u6b63\u786e\u7b54\u6848\uff1aB\uff0c183.80.64.0<\/p>\n\n\n\n<p>\u5df2\u77e5\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>IP \u5730\u5740\uff1a183.80.72.48<\/li>\n\n\n\n<li>\u5b50\u7f51\u63a9\u7801\uff1a255.255.192.0<\/li>\n<\/ul>\n\n\n\n<p>\u628a\u63a9\u7801\u8f6c\u6210\u524d\u7f00\u957f\u5ea6\uff1a<\/p>\n\n\n\n<p><code>255.255.192.0 = \/18<\/code><\/p>\n\n\n\n<p>\u56e0\u4e3a\u7b2c\u4e09\u4e2a\u5b57\u8282\u662f 192\uff0c\u5757\u5927\u5c0f\u5c31\u662f\uff1a<\/p>\n\n\n\n<p><code>256 - 192 = 64<\/code><\/p>\n\n\n\n<p>\u6240\u4ee5\u7b2c\u4e09\u4e2a\u5b57\u8282\u7684\u7f51\u6bb5\u5212\u5206\u662f\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>0 ~ 63<\/li>\n\n\n\n<li>64 ~ 127<\/li>\n\n\n\n<li>128 ~ 191<\/li>\n\n\n\n<li>192 ~ 255<\/li>\n<\/ul>\n\n\n\n<p>\u800c\u4e3b\u673a IP \u7684\u7b2c\u4e09\u4e2a\u5b57\u8282\u662f <code>72<\/code>\uff0c\u843d\u5728 <code>64 ~ 127<\/code> \u8fd9\u4e00\u5757\u91cc\u3002<br>\u6240\u4ee5\u7f51\u7edc\u5730\u5740\u5c31\u662f\uff1a<\/p>\n\n\n\n<p><code>183.80.64.0<\/code><\/p>\n\n\n\n<p>\u9009 B\u3002<\/p>\n\n\n\n<p>\u8fd9\u7c7b\u9898\u6700\u5b9e\u7528\u7684\u901f\u7b97\u6cd5\u5c31\u662f\uff1a<\/p>\n\n\n\n<p>\u5757\u5927\u5c0f = <code>256 - \u63a9\u7801\u8be5\u5b57\u8282\u7684\u503c<\/code><\/p>\n\n\n\n<p>\u7136\u540e\u770b IP \u843d\u5728\u54ea\u4e00\u5757\uff0c\u5757\u8d77\u70b9\u5c31\u662f\u7f51\u7edc\u5730\u5740\u5bf9\u5e94\u5b57\u8282\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u7b2c68\u9898\uff1a\u4e3b\u673a H \u7684\u5b50\u7f51\u63a9\u7801\u548c\u9ed8\u8ba4\u7f51\u5173<\/h2>\n\n\n\n<p>\u6b63\u786e\u7b54\u6848\uff1aD\uff0c255.255.255.224\uff0c192.168.1.62<\/p>\n\n\n\n<p>\u56fe\u4e2d\u4e3b\u673a H \u7684 IP \u662f\uff1a<\/p>\n\n\n\n<p><code>192.168.1.60<\/code><\/p>\n\n\n\n<p>\u4e0e\u4ea4\u6362\u673a\u76f8\u8fde\u7684\u8def\u7531\u5668\u63a5\u53e3\u6807\u7684\u662f\uff1a<\/p>\n\n\n\n<p><code>192.168.1.62\/27<\/code><\/p>\n\n\n\n<p>\u8fd9\u5c31\u8bf4\u660e H \u6240\u5728\u5c40\u57df\u7f51\u4f7f\u7528\u7684\u662f <code>\/27<\/code>\uff0c\u4e5f\u5c31\u662f\u5b50\u7f51\u63a9\u7801\uff1a<\/p>\n\n\n\n<p><code>255.255.255.224<\/code><\/p>\n\n\n\n<p><code>\/27<\/code> \u7684\u5757\u5927\u5c0f\u662f <code>32<\/code>\uff0c\u6240\u4ee5 <code>192.168.1.60<\/code> \u6240\u5728\u5b50\u7f51\u662f\uff1a<\/p>\n\n\n\n<p><code>192.168.1.32 ~ 192.168.1.63<\/code><\/p>\n\n\n\n<p>\u5176\u4e2d\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u7f51\u7edc\u5730\u5740\uff1a192.168.1.32<\/li>\n\n\n\n<li>\u5e7f\u64ad\u5730\u5740\uff1a192.168.1.63<\/li>\n\n\n\n<li>\u53ef\u5206\u914d\u4e3b\u673a\u5730\u5740\uff1a192.168.1.33 ~ 192.168.1.62<\/li>\n<\/ul>\n\n\n\n<p>\u8def\u7531\u5668\u5728\u8fd9\u4e2a\u7f51\u6bb5\u4e2d\u7684\u63a5\u53e3\u5730\u5740\u6b63\u662f <code>192.168.1.62<\/code>\uff0c\u6240\u4ee5\u9ed8\u8ba4\u7f51\u5173\u4e5f\u5e94\u662f\u5b83\u3002<\/p>\n\n\n\n<p>\u56e0\u6b64\u9009 D\u3002<\/p>\n\n\n\n<p>\u8fd9\u9898\u5f88\u5bb9\u6613\u88ab\u56fe\u4e0a\u90a3\u6761 <code>192.168.1.1\/30<\/code> \u8bef\u5bfc\u3002<br>\u90a3\u4e2a <code>\/30<\/code> \u662f\u4e24\u53f0\u8def\u7531\u5668\u4e4b\u95f4\u7684\u70b9\u5230\u70b9\u94fe\u8def\uff0c\u548c\u4e3b\u673a H \u6240\u5728 LAN \u4e0d\u662f\u4e00\u4e2a\u5b50\u7f51\uff0c\u4e0d\u80fd\u62ff\u6765\u5f53 H \u7684\u7f51\u5173\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u7b2c69\u9898\uff1aR2 \u505a NAT\uff0c\u8f6c\u53d1\u540e\u6e90 IP \u662f\u4ec0\u4e48<\/h2>\n\n\n\n<p>\u6b63\u786e\u7b54\u6848\uff1aA\uff0c195.123.0.33<\/p>\n\n\n\n<p>\u4e3b\u673a H \u7684\u79c1\u7f51\u5730\u5740\u662f\uff1a<\/p>\n\n\n\n<p><code>192.168.0.3<\/code><\/p>\n\n\n\n<p>R2 \u5b9e\u73b0 NAT\uff0c\u6240\u4ee5\u5f53 H \u53d1\u5f80 Internet \u65f6\uff0c\u7ecf\u8fc7 R2 \u4e4b\u540e\uff0c\u6e90 IP \u4e00\u5b9a\u4f1a\u88ab\u6539\u5199\u6210 <strong>R2 \u5916\u7f51\u63a5\u53e3\u7684\u516c\u7f51\u5730\u5740<\/strong>\uff0c\u800c\u4e0d\u4f1a\u518d\u4fdd\u7559\u79c1\u7f51\u5730\u5740\u3002<\/p>\n\n\n\n<p>\u56fe\u4e2d R1 \u4e0e R2 \u4e4b\u95f4\u94fe\u8def\u4e0a\u7ed9\u51fa\u7684\u5730\u5740\u662f\uff1a<\/p>\n\n\n\n<p><code>195.123.0.34\/30<\/code><\/p>\n\n\n\n<p><code>\/30<\/code> \u7684\u5730\u5740\u5757\u5927\u5c0f\u662f 4\uff0c\u6240\u4ee5\u8fd9\u4e00\u6bb5\u7f51\u7edc\u662f\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u7f51\u7edc\u5730\u5740\uff1a195.123.0.32<\/li>\n\n\n\n<li>\u53ef\u7528\u5730\u5740\uff1a195.123.0.33\u3001195.123.0.34<\/li>\n\n\n\n<li>\u5e7f\u64ad\u5730\u5740\uff1a195.123.0.35<\/li>\n<\/ul>\n\n\n\n<p>\u56fe\u4e2d\u6807\u51fa\u7684 <code>195.123.0.34\/30<\/code> \u5bf9\u5e94\u7684\u662f R1 \u8fd9\u4e00\u4fa7\u63a5\u53e3\uff0c\u90a3\u4e48 R2 \u5916\u7f51\u63a5\u53e3\u53ea\u80fd\u662f\u53e6\u4e00\u4e2a\u53ef\u7528\u5730\u5740\uff1a<\/p>\n\n\n\n<p><code>195.123.0.33<\/code><\/p>\n\n\n\n<p>\u56e0\u6b64\u7ecf\u8fc7 R2 NAT \u540e\uff0c\u8be5 IP \u5206\u7ec4\u7684\u6e90 IP \u5730\u5740\u5e94\u4e3a\uff1a<\/p>\n\n\n\n<p><code>195.123.0.33<\/code><\/p>\n\n\n\n<p>\u9009 A\u3002<\/p>\n\n\n\n<p>\u8fd9\u9898\u7684\u672c\u8d28\u5c31\u4e00\u53e5\u8bdd\uff1a<br>NAT \u6539\u7684\u662f\u201c\u6e90\u5730\u5740\u201d\uff0c\u6539\u6210 NAT \u8def\u7531\u5668\u5916\u7f51\u53e3\u7684\u516c\u7f51 IP\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\/70-768x1024.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\/70-768x1024.jpg\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-1960\"  sizes=\"auto, (max-width: 768px) 100vw, 768px\" \/><\/div><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">\u7b2c70\u9898\uff1a168.16.84.24\/20 \u6240\u5728\u5b50\u7f51\u7684\u6700\u5c0f\u548c\u6700\u5927\u53ef\u5206\u914d IP<\/h2>\n\n\n\n<p>\u6b63\u786e\u7b54\u6848\uff1aB\uff0c168.16.80.1\uff0c168.16.95.254<\/p>\n\n\n\n<p><code>\/20<\/code> \u5bf9\u5e94\u63a9\u7801\uff1a<\/p>\n\n\n\n<p><code>255.255.240.0<\/code><\/p>\n\n\n\n<p>\u7b2c\u4e09\u4e2a\u5b57\u8282\u7684\u5757\u5927\u5c0f\uff1a<\/p>\n\n\n\n<p><code>256 - 240 = 16<\/code><\/p>\n\n\n\n<p>\u6240\u4ee5\u7b2c\u4e09\u4e2a\u5b57\u8282\u7684\u7f51\u6bb5\u5212\u5206\u662f\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>0 ~ 15<\/li>\n\n\n\n<li>16 ~ 31<\/li>\n\n\n\n<li>32 ~ 47<\/li>\n\n\n\n<li>48 ~ 63<\/li>\n\n\n\n<li>64 ~ 79<\/li>\n\n\n\n<li>80 ~ 95<\/li>\n\n\n\n<li>96 ~ 111<\/li>\n\n\n\n<li>\u2026<\/li>\n<\/ul>\n\n\n\n<p>\u4e3b\u673a\u5730\u5740\u7684\u7b2c\u4e09\u4e2a\u5b57\u8282\u662f <code>84<\/code>\uff0c\u843d\u5728 <code>80 ~ 95<\/code> \u8fd9\u4e00\u5757\u91cc\u3002<\/p>\n\n\n\n<p>\u6240\u4ee5\u8be5\u5b50\u7f51\u662f\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u7f51\u7edc\u5730\u5740\uff1a<code>168.16.80.0<\/code><\/li>\n\n\n\n<li>\u5e7f\u64ad\u5730\u5740\uff1a<code>168.16.95.255<\/code><\/li>\n<\/ul>\n\n\n\n<p>\u56e0\u6b64\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u6700\u5c0f\u53ef\u5206\u914d IP\uff1a<code>168.16.80.1<\/code><\/li>\n\n\n\n<li>\u6700\u5927\u53ef\u5206\u914d IP\uff1a<code>168.16.95.254<\/code><\/li>\n<\/ul>\n\n\n\n<p>\u9009 B\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 7 \u9898\u5b9e\u9645\u8003\u4e86\u54ea\u4e9b\u56fa\u5b9a\u5957\u8def<\/h2>\n\n\n\n<p>\u8fd9\u7ec4\u9898\u57fa\u672c\u628a IPv4 \u4e2d\u6700\u5e38\u8003\u7684\u51e0\u4e2a\u5957\u8def\u90fd\u78b0\u5230\u4e86\uff1a<\/p>\n\n\n\n<p>\u7b2c\u4e00\u7c7b\u662f\u201c\u524d\u7f00\u957f\u5ea6 \/ \u63a9\u7801 \/ \u5757\u5927\u5c0f \/ \u7f51\u7edc\u5730\u5740 \/ \u5e7f\u64ad\u5730\u5740 \/ \u53ef\u5206\u914d\u5730\u5740\u8303\u56f4\u201d\u7684\u76f8\u4e92\u8f6c\u6362\u3002<br>\u5bf9\u5e94\u672c\u9898\u7684 64\u300167\u300168\u300170\u3002<\/p>\n\n\n\n<p>\u7b2c\u4e8c\u7c7b\u662f\u201c\u5b50\u7f51\u4e4b\u95f4\u80fd\u5426\u62fc\u6210\u540c\u4e00\u4e2a\u7236\u7f51\u7edc\u201d\u3002<br>\u5bf9\u5e94\u7b2c 65 \u9898\u3002<\/p>\n\n\n\n<p>\u7b2c\u4e09\u7c7b\u662f\u201cIP \u5206\u7247\u201d\u3002<br>\u5bf9\u5e94\u7b2c 66 \u9898\u3002<\/p>\n\n\n\n<p>\u7b2c\u56db\u7c7b\u662f\u201c\u9ed8\u8ba4\u7f51\u5173\u201d\u548c\u201cNAT \u540e\u5730\u5740\u53d8\u5316\u201d\u3002<br>\u5bf9\u5e94\u7b2c 68\u300169 \u9898\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u505a\u8fd9\u7c7b\u9898\u6700\u5feb\u7684\u51e0\u4e2a\u56fa\u5b9a\u6a21\u677f<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">1\uff09\u5148\u770b\u5757\u5927\u5c0f<\/h3>\n\n\n\n<p>\u53ea\u8981\u63a9\u7801\u67d0\u4e2a\u5b57\u8282\u4e0d\u662f 255 \u4e5f\u4e0d\u662f 0\uff0c\u5c31\u770b\u8fd9\u4e00\u5b57\u8282\uff1a<\/p>\n\n\n\n<p><code>\u5757\u5927\u5c0f = 256 - \u8be5\u5b57\u8282\u63a9\u7801\u503c<\/code><\/p>\n\n\n\n<p>\u6bd4\u5982\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>255.255.192.0 \u2192 \u5757\u5927\u5c0f 64<\/li>\n\n\n\n<li>255.255.240.0 \u2192 \u5757\u5927\u5c0f 16<\/li>\n\n\n\n<li>255.255.255.224 \u2192 \u5757\u5927\u5c0f 32<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">2\uff09\u7f51\u7edc\u5730\u5740\u5c31\u662f\u201c\u5411\u4e0b\u843d\u5757\u201d<\/h3>\n\n\n\n<p>\u6bd4\u5982 84 \u5728\u7b2c\u4e09\u5b57\u8282\uff0c\u5757\u5927\u5c0f 16\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>0,16,32,48,64,80,96&#8230;<\/li>\n\n\n\n<li>84 \u843d\u5728 80~95<\/li>\n\n\n\n<li>\u6240\u4ee5\u7f51\u7edc\u5730\u5740\u7b2c\u4e09\u5b57\u8282\u5c31\u662f 80<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">3\uff09\u5e7f\u64ad\u5730\u5740\u5c31\u662f\u8be5\u5757\u6700\u540e\u4e00\u4e2a\u5730\u5740<\/h3>\n\n\n\n<p>\u6bd4\u5982 80~95 \u8fd9\u4e00\u5757\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u7f51\u7edc\u5730\u5740\uff1a80<\/li>\n\n\n\n<li>\u5e7f\u64ad\u5730\u5740\uff1a95<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">4\uff09\u53ef\u5206\u914d\u5730\u5740\u8303\u56f4\u5c31\u662f<\/h3>\n\n\n\n<p><code>\u7f51\u7edc\u5730\u5740 + 1 ~ \u5e7f\u64ad\u5730\u5740 - 1<\/code><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">5\uff09IP \u5206\u7247\u6700\u5927\u6570\u636e\u91cf\u56fa\u5b9a\u7528<\/h3>\n\n\n\n<p><code>floor((MTU - \u9996\u90e8\u957f\u5ea6) \/ 8) \u00d7 8<\/code><\/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\/72-1024x768.jpg'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"768\" data-original=\"http:\/\/www.preluna.xyz\/wp-content\/uploads\/2026\/04\/72-1024x768.jpg\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-1963\"  sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/div><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">\u7b2c71\u9898\u8fd9\u6837\u770b\uff1a<\/h2>\n\n\n\n<p>\u5148\u770b VLAN \u5212\u5206\u3002\u56fe\u91cc\u4ea4\u6362\u673a\u6309\u7aef\u53e3\u5206\u6210\u4e86 3 \u4e2a VLAN\uff1a<\/p>\n\n\n\n<p>VLAN1\uff1a1\uff5e5\u300113\uff5e17<br>VLAN2\uff1a6\uff5e8\u300118\uff5e20<br>VLAN3\uff1a9\uff5e12\u300121\uff5e24<\/p>\n\n\n\n<p>\u518d\u770b\u5404\u4e3b\u673a\u63a5\u5728\u54ea\u4e9b\u7aef\u53e3\u4e0a\u3002H4 \u63a5\u5728 VLAN1\uff0c\u6240\u4ee5 H4 \u548c H1\u3001H2\u3001H3 \u5c5e\u4e8e\u540c\u4e00\u4e2a VLAN\uff1bH5\u3001H6\u3001H7 \u4e0d\u5728\u540c\u4e00\u4e2a VLAN\u3002<\/p>\n\n\n\n<p>ARP \u8bf7\u6c42\u662f\u4e8c\u5c42\u5e7f\u64ad\uff0c\u4f46\u5e7f\u64ad\u4e0d\u80fd\u8de8 VLAN \u4f20\u64ad\u3002\u6240\u4ee5 H4 \u7684 ARP \u8868\u91cc\uff0c\u53ea\u53ef\u80fd\u51fa\u73b0\u540c\u4e00 VLAN \u5185\u4e3b\u673a\u7684 IP-MAC \u6620\u5c04\uff0c\u4e0d\u53ef\u80fd\u51fa\u73b0\u5176\u4ed6 VLAN \u4e3b\u673a\u7684\u6620\u5c04\u3002<\/p>\n\n\n\n<p>\u9009\u9879\u91cc\uff1a<br>A \u662f H2\uff0c\u548c H4 \u540c VLAN\uff0c\u53ef\u4ee5\u51fa\u73b0\u3002<br>B \u662f H1\uff0c\u548c H4 \u540c VLAN\uff0c\u53ef\u4ee5\u51fa\u73b0\u3002<br>C \u662f H3\uff0c\u548c H4 \u540c VLAN\uff0c\u53ef\u4ee5\u51fa\u73b0\u3002<br>D \u662f H6\uff0c\u5c5e\u4e8e VLAN3\uff0c\u4e0d\u80fd\u51fa\u73b0\u5728 H4 \u7684 ARP \u8868\u4e2d\u3002<\/p>\n\n\n\n<p>\u6240\u4ee5\u7b2c71\u9898\u9009 D\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u7b2c72\u9898\u8fd9\u6837\u505a\uff1a<\/h2>\n\n\n\n<p>\u8fd9\u662f DHCP \u52a8\u6001\u5206\u914d\u5730\u5740\u8fc7\u7a0b\u3002\u9898\u76ee\u95ee\u7684\u662f\uff1a\u4e3b\u673a H \u53d1\u9001 DHCPREQUEST \u65f6\uff0c\u5c01\u88c5\u8be5\u62a5\u6587\u7684 IP \u6570\u636e\u62a5\u201c\u76ee\u7684 IP \u5730\u5740\u201d\u548c\u201c\u6e90 IP \u5730\u5740\u201d\u5206\u522b\u662f\u4ec0\u4e48\u3002<\/p>\n\n\n\n<p>\u5173\u952e\u70b9\u662f\uff1a<br>\u5ba2\u6237\u7aef\u6b64\u65f6\u8fd8\u6ca1\u6709\u771f\u6b63\u914d\u7f6e\u597d IP \u5730\u5740\uff0c\u867d\u7136 DHCPOFFER \u91cc\u7ed9\u4e86\u4e00\u4e2a\u5f85\u5206\u914d\u5730\u5740 yiaddr=192.168.5.9\uff0c\u4f46\u5728 DHCPACK \u4e4b\u524d\uff0c\u8fd9\u4e2a\u5730\u5740\u8fd8\u4e0d\u80fd\u7b97\u5ba2\u6237\u7aef\u6b63\u5f0f\u62e5\u6709\u3002<\/p>\n\n\n\n<p>\u6240\u4ee5 DHCPREQUEST \u53d1\u9001\u65f6\uff1a<\/p>\n\n\n\n<p>\u6e90 IP \u5730\u5740\uff1a0.0.0.0<br>\u76ee\u7684 IP \u5730\u5740\uff1a255.255.255.255<\/p>\n\n\n\n<p>\u4e5f\u5c31\u662f\u5e7f\u64ad\u53d1\u9001\uff0c\u544a\u8bc9 DHCP \u670d\u52a1\u5668\u201c\u6211\u8981\u8fd9\u4e2a\u5730\u5740\u201d\u3002<\/p>\n\n\n\n<p>\u6240\u4ee5\u7b2c72\u9898\u9009 C\u3002<\/p>\n\n\n\n<p>\u4f60\u53ef\u4ee5\u987a\u624b\u8bb0\u8fd9\u4e24\u4e2a\u9ad8\u9891\u7ed3\u8bba\uff1a<\/p>\n\n\n\n<p>ARP\uff1a\u53ea\u5728\u540c\u4e00\u5e7f\u64ad\u57df\/\u540c\u4e00 VLAN \u5185\u751f\u6548\u3002<br>DHCP \u5ba2\u6237\u7aef\u5728\u62ff\u5230\u6700\u7ec8 ACK \u524d\uff0c\u6e90 IP \u4e00\u822c\u8fd8\u662f 0.0.0.0\u3002<\/p>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>57 \u9898\uff1a\u8def\u7531\u8868\u5339\u914d\uff0c\u9009\u54ea\u6761\u8def\u7531 \u9898\u5e72\u91cc\u8def\u7531\u8868\u662f\uff1a \u6536\u5230\u7684 IP \u5206\u7ec4\u76ee\u7684\u5730\u5740\u662f 169.96.40.5\u3002 \u672c [&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-1953","post","type-post","status-publish","format-standard","hentry","category-text"],"_links":{"self":[{"href":"http:\/\/www.preluna.xyz\/index.php\/wp-json\/wp\/v2\/posts\/1953","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=1953"}],"version-history":[{"count":5,"href":"http:\/\/www.preluna.xyz\/index.php\/wp-json\/wp\/v2\/posts\/1953\/revisions"}],"predecessor-version":[{"id":1979,"href":"http:\/\/www.preluna.xyz\/index.php\/wp-json\/wp\/v2\/posts\/1953\/revisions\/1979"}],"wp:attachment":[{"href":"http:\/\/www.preluna.xyz\/index.php\/wp-json\/wp\/v2\/media?parent=1953"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.preluna.xyz\/index.php\/wp-json\/wp\/v2\/categories?post=1953"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.preluna.xyz\/index.php\/wp-json\/wp\/v2\/tags?post=1953"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}