{"id":1937,"date":"2026-04-16T17:46:32","date_gmt":"2026-04-16T09:46:32","guid":{"rendered":"http:\/\/www.preluna.xyz\/?p=1937"},"modified":"2026-04-16T18:41:32","modified_gmt":"2026-04-16T10:41:32","slug":"ipv-4","status":"publish","type":"post","link":"http:\/\/www.preluna.xyz\/index.php\/2026\/04\/16\/ipv-4\/preluna\/text\/","title":{"rendered":"IPv 4"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">\u8fd9\u4e00\u5757\u7684\u4e3b\u7ebf\u5148\u7406\u987a<\/h2>\n\n\n\n<p>\u8fd9\u4e00\u5927\u5757\u5176\u5b9e\u5c31\u662f\u7f51\u7edc\u5c42\u6700\u6838\u5fc3\u7684\u4e00\u6761\u4e3b\u7ebf\uff1a<strong>\u4e3b\u673a\u5148\u7528 IP \u5730\u5740\u6807\u8bc6\u201c\u8981\u53bb\u54ea\u91cc\u201d\uff0c\u518d\u7ed3\u5408\u5b50\u7f51\u63a9\u7801\u5224\u65ad\u201c\u662f\u4e0d\u662f\u540c\u4e00\u7f51\u6bb5\u201d\uff0c\u5982\u679c\u4e0d\u662f\u540c\u4e00\u7f51\u6bb5\uff0c\u5c31\u628a\u6570\u636e\u4ea4\u7ed9\u9ed8\u8ba4\u7f51\u5173\uff1b\u8def\u7531\u5668\u4f9d\u636e\u8def\u7531\u8868\u8fdb\u884c\u8f6c\u53d1\uff0c\u8f6c\u53d1\u65f6\u6838\u5fc3\u770b\u7684\u662f\u76ee\u6807 IP \u5730\u5740\uff1b\u5982\u679c\u94fe\u8def\u5c42\u53d1\u9001\u5230\u4e0b\u4e00\u8df3\uff0c\u8fd8\u8981\u501f\u52a9 ARP \u628a\u4e0b\u4e00\u8df3 IP \u89e3\u6790\u6210 MAC \u5730\u5740\uff1b\u5982\u679c\u5206\u7ec4\u592a\u5927\uff0c\u8fd8\u53ef\u80fd\u53d1\u751f\u5206\u7247\uff1b\u5982\u679c\u8de8\u516c\u7f51\u79c1\u7f51\u8fb9\u754c\uff0c\u8fd8\u4f1a\u7528\u5230 NAT\u3002<\/strong><\/p>\n\n\n\n<p>\u6240\u4ee5\u8fd9\u4e9b\u77e5\u8bc6\u70b9\u770b\u8d77\u6765\u5f88\u591a\uff0c\u4f46\u672c\u8d28\u4e0a\u53ef\u4ee5\u4e32\u6210\u4e00\u53e5\u8bdd\uff1a<\/p>\n\n\n\n<p><strong>IP \u8d1f\u8d23\u903b\u8f91\u5bfb\u5740\u4e0e\u8def\u7531\uff0cARP \u8d1f\u8d23\u4e0b\u4e00\u8df3\u7684\u94fe\u8def\u5c42\u5bfb\u5740\uff0c\u5b50\u7f51\u63a9\u7801\/CIDR \u8d1f\u8d23\u7f51\u7edc\u5212\u5206\u4e0e\u805a\u5408\uff0cTTL \u9632\u6b62\u5206\u7ec4\u5728\u7f51\u7edc\u4e2d\u65e0\u9650\u515c\u5708\uff0cNAT \u89e3\u51b3\u79c1\u6709\u5730\u5740\u8bbf\u95ee\u516c\u7f51\u7684\u95ee\u9898\u3002<\/strong><\/p>\n\n\n\n<p>\u4e0b\u9762\u6309\u4e2d\u56fd\u8ba1\u7b97\u673a\u8003\u7814\u6700\u5e38\u89c1\u7684\u8003\u6cd5\u7cfb\u7edf\u6574\u7406\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">IPv4 \u5206\u7ec4\u9996\u90e8\u683c\u5f0f\u53ca\u5b57\u6bb5\u542b\u4e49<\/h2>\n\n\n\n<p>IPv4 \u6570\u636e\u62a5\u7531\u4e24\u90e8\u5206\u7ec4\u6210\uff1a<strong>\u9996\u90e8 + \u6570\u636e\u90e8\u5206<\/strong>\u3002<br>\u5176\u4e2d\u9996\u90e8\u6700\u5c11 20B\uff0c\u6700\u591a 60B\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">IPv4 \u9996\u90e8\u4e3b\u8981\u5b57\u6bb5<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u5b57\u6bb5<\/th><th>\u4f4d\u6570<\/th><th>\u542b\u4e49<\/th><th>\u5e38\u89c1\u8003\u70b9<\/th><\/tr><\/thead><tbody><tr><td>\u7248\u672c Version<\/td><td>4<\/td><td>\u6307\u660e IP \u534f\u8bae\u7248\u672c\uff0cIPv4 \u4e2d\u503c\u4e3a 4<\/td><td>\u7248\u672c\u53f7\u8bc6\u522b<\/td><\/tr><tr><td>\u9996\u90e8\u957f\u5ea6 IHL<\/td><td>4<\/td><td>\u4ee5 4B \u4e3a\u5355\u4f4d\uff0c\u6700\u5c0f\u503c 5\uff0c\u5373\u6700\u5c0f\u9996\u90e8 20B<\/td><td>\u7b97\u9996\u90e8\u957f\u5ea6\u3001\u6570\u636e\u957f\u5ea6<\/td><\/tr><tr><td>\u533a\u5206\u670d\u52a1\/\u670d\u52a1\u7c7b\u578b<\/td><td>8<\/td><td>\u65e9\u671f\u53eb TOS\uff0c\u73b0\u591a\u7528\u4e8e\u533a\u5206\u4e1a\u52a1\u670d\u52a1\u8d28\u91cf<\/td><td>\u4e86\u89e3\u5373\u53ef<\/td><\/tr><tr><td>\u603b\u957f\u5ea6 Total Length<\/td><td>16<\/td><td>\u6574\u4e2a IP \u6570\u636e\u62a5\u957f\u5ea6\uff0c\u5355\u4f4d\u662f\u5b57\u8282\uff0c\u5305\u62ec\u9996\u90e8\u548c\u6570\u636e<\/td><td>\u5e38\u7528\u4e8e\u5206\u7247\u8ba1\u7b97<\/td><\/tr><tr><td>\u6807\u8bc6 Identification<\/td><td>16<\/td><td>\u540c\u4e00\u539f\u59cb\u6570\u636e\u62a5\u5206\u7247\u540e\uff0c\u5404\u7247\u7684\u6807\u8bc6\u76f8\u540c<\/td><td>\u5206\u7247\u91cd\u7ec4\u6838\u5fc3\u5b57\u6bb5<\/td><\/tr><tr><td>\u6807\u5fd7 Flags<\/td><td>3<\/td><td>\u4e0e\u5206\u7247\u6709\u5173\uff0c\u5e38\u8003 DF\u3001MF<\/td><td>\u9ad8\u9891<\/td><\/tr><tr><td>\u7247\u504f\u79fb Fragment Offset<\/td><td>13<\/td><td>\u67d0\u7247\u6570\u636e\u5728\u539f\u59cb\u6570\u636e\u62a5\u4e2d\u7684\u76f8\u5bf9\u4f4d\u7f6e\uff0c\u5355\u4f4d\u662f 8B<\/td><td>\u9ad8\u9891\u8ba1\u7b97\u70b9<\/td><\/tr><tr><td>\u751f\u5b58\u65f6\u95f4 TTL<\/td><td>8<\/td><td>\u5206\u7ec4\u5728\u7f51\u7edc\u4e2d\u5141\u8bb8\u7ecf\u8fc7\u7684\u6700\u5927\u8def\u7531\u5668\u8df3\u6570<\/td><td>\u9ad8\u9891\u6982\u5ff5\u9898<\/td><\/tr><tr><td>\u534f\u8bae Protocol<\/td><td>8<\/td><td>\u6307\u660e\u4e0a\u5c42\u534f\u8bae\uff0c\u5982 TCP=6\uff0cUDP=17\uff0cICMP=1<\/td><td>\u9ad8\u9891\u9009\u62e9\u9898<\/td><\/tr><tr><td>\u9996\u90e8\u68c0\u9a8c\u548c Header Checksum<\/td><td>16<\/td><td>\u53ea\u6821\u9a8c IP \u9996\u90e8\uff0c\u4e0d\u6821\u9a8c\u6570\u636e\u90e8\u5206<\/td><td>\u6613\u6df7<\/td><\/tr><tr><td>\u6e90 IP \u5730\u5740<\/td><td>32<\/td><td>\u53d1\u9001\u65b9 IP<\/td><td>\u57fa\u672c\u5b57\u6bb5<\/td><\/tr><tr><td>\u76ee\u7684 IP \u5730\u5740<\/td><td>32<\/td><td>\u63a5\u6536\u65b9 IP<\/td><td>\u8def\u7531\u8f6c\u53d1\u4f9d\u636e<\/td><\/tr><tr><td>\u53ef\u9009\u5b57\u6bb5 Options<\/td><td>\u53ef\u53d8<\/td><td>\u5f88\u5c11\u8003\u7ec6\u8282<\/td><td>\u8bb0\u4f4f\u53ef\u53d8\u5bfc\u81f4\u9996\u90e8\u4e0d\u4e00\u5b9a 20B<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">\u6807\u5fd7\u4f4d Flags \u7684\u91cd\u70b9<\/h3>\n\n\n\n<p>Flags \u91cc\u771f\u6b63\u5e38\u8003\u7684\u662f\u4e24\u4e2a\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>DF\uff08Don\u2019t Fragment\uff09<\/strong>\uff1a\u7981\u6b62\u5206\u7247<br>DF = 1\uff0c\u8868\u793a\u8be5\u6570\u636e\u62a5<strong>\u4e0d\u80fd\u5206\u7247<\/strong>\u3002\u5982\u679c\u4e0b\u4e00\u6bb5\u94fe\u8def MTU \u592a\u5c0f\uff0c\u8def\u7531\u5668\u4f1a\u76f4\u63a5\u4e22\u5f03\u5e76\u8fd4\u56de\u5dee\u9519\u4fe1\u606f\u3002<\/li>\n\n\n\n<li><strong>MF\uff08More Fragments\uff09<\/strong>\uff1a\u540e\u9762\u662f\u5426\u8fd8\u6709\u5206\u7247<br>MF = 1\uff0c\u8868\u793a\u201c\u540e\u9762\u8fd8\u6709\u5206\u7247\u201d<br>MF = 0\uff0c\u8868\u793a\u201c\u8fd9\u662f\u6700\u540e\u4e00\u4e2a\u5206\u7247\u201d<\/li>\n<\/ol>\n\n\n\n<p>\u6240\u4ee5\u505a\u9898\u65f6\uff0c\u5206\u7247\u9898\u4e00\u5b9a\u76ef\u4f4f\u4e09\u4ef6\u4e8b\uff1a<\/p>\n\n\n\n<p><strong>\u6807\u8bc6\u76f8\u540c\u3001\u7247\u504f\u79fb\u6309 8B \u8ba1\u3001\u9664\u6700\u540e\u4e00\u7247\u5916\u6570\u636e\u957f\u5ea6\u901a\u5e38\u5e94\u662f 8B \u7684\u6574\u6570\u500d\u3002<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">TTL \u673a\u5236\u600e\u4e48\u7406\u89e3<\/h2>\n\n\n\n<p>TTL \u662f <strong>Time To Live<\/strong>\uff0c\u4e2d\u6587\u5e38\u53eb<strong>\u751f\u5b58\u65f6\u95f4<\/strong>\u3002<br>\u4f46\u5728\u8003\u7814\u91cc\uff0c\u66f4\u51c6\u786e\u5730\u7406\u89e3\u6210\uff1a<strong>\u5141\u8bb8\u7ecf\u8fc7\u7684\u6700\u5927\u8def\u7531\u5668\u8df3\u6570<\/strong>\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">TTL \u7684\u5de5\u4f5c\u8fc7\u7a0b<\/h3>\n\n\n\n<p>\u4e00\u4e2a IP \u6570\u636e\u62a5\u4ece\u6e90\u4e3b\u673a\u53d1\u51fa\u65f6\uff0c\u4f1a\u88ab\u8d4b\u4e00\u4e2a\u521d\u59cb TTL \u503c\uff0c\u6bd4\u5982 64\u3001128\u3001255 \u7b49\u3002<br>\u4e4b\u540e\u6bcf\u7ecf\u8fc7\u4e00\u4e2a\u8def\u7531\u5668\uff0cTTL \u5c31\u51cf 1\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5982\u679c\u51cf\u5b8c\u540e TTL &gt; 0\uff0c\u5219\u7ee7\u7eed\u8f6c\u53d1<\/li>\n\n\n\n<li>\u5982\u679c TTL = 0\uff0c\u5219\u8def\u7531\u5668\u4e22\u5f03\u8be5\u5206\u7ec4\uff0c\u5e76\u901a\u5e38\u53d1\u9001 ICMP \u8d85\u65f6\u62a5\u6587\u7ed9\u6e90\u4e3b\u673a<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">TTL \u7684\u4f5c\u7528<\/h3>\n\n\n\n<p>TTL \u7684\u672c\u8d28\u4f5c\u7528\u662f\uff1a<\/p>\n\n\n\n<p><strong>\u9632\u6b62\u5206\u7ec4\u5728\u7f51\u7edc\u4e2d\u56e0\u8def\u7531\u73af\u8def\u800c\u65e0\u9650\u8f6c\u53d1\u3002<\/strong><\/p>\n\n\n\n<p>\u5982\u679c\u6ca1\u6709 TTL\uff0c\u7f51\u7edc\u4e00\u65e6\u51fa\u73b0\u73af\u8def\uff0c\u5206\u7ec4\u53ef\u80fd\u6c38\u8fdc\u515c\u5708\uff0c\u6301\u7eed\u5360\u7528\u5e26\u5bbd\u548c\u8bbe\u5907\u8d44\u6e90\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">TTL \u7684\u5178\u578b\u8003\u6cd5<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">1. \u5224\u65ad\u6700\u591a\u7ecf\u8fc7\u591a\u5c11\u53f0\u8def\u7531\u5668<\/h4>\n\n\n\n<p>\u82e5\u521d\u59cb TTL = 8\uff0c\u5219\u6700\u591a\u53ef\u7ecf\u8fc7 <strong>8 \u53f0\u8def\u7531\u5668<\/strong>\u3002<br>\u7ecf\u8fc7\u7b2c 8 \u53f0\u65f6\u51cf\u4e3a 0\uff0c\u901a\u5e38\u5c31\u4e0d\u80fd\u518d\u7ee7\u7eed\u5f80\u540e\u8f6c\u53d1\u4e86\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">2. traceroute \u7684\u539f\u7406<\/h4>\n\n\n\n<p>traceroute\/tracert \u5c31\u662f\u6545\u610f\u53d1\u9001 TTL = 1\u30012\u30013\u2026\u2026 \u7684\u62a5\u6587\uff0c<br>\u8ba9\u6cbf\u9014\u8def\u7531\u5668\u4f9d\u6b21\u56e0\u4e3a TTL \u5230 0 \u800c\u8fd4\u56de ICMP \u8d85\u65f6\u4fe1\u606f\uff0c\u4ece\u800c\u63a2\u6d4b\u8def\u5f84\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u6613\u9519\u70b9<\/h3>\n\n\n\n<p>\u5f88\u591a\u540c\u5b66\u4f1a\u628a TTL \u7406\u89e3\u6210\u201c\u65f6\u95f4\u79d2\u6570\u201d\u3002<br>\u5728\u73b0\u4ee3 IP \u7f51\u7edc\u91cc\uff0c<strong>\u8003\u8bd5\u4e2d\u5e94\u4f18\u5148\u6309\u201c\u8df3\u6570\u9650\u5236\u201d\u7406\u89e3<\/strong>\uff0c\u4e0d\u8981\u5f80\u771f\u5b9e\u65f6\u95f4\u6d41\u901d\u4e0a\u60f3\u592a\u591a\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">IP \u6570\u636e\u62a5\u5206\u6790\u65f6\uff0c\u6700\u5e38\u6293\u54ea\u4e9b\u5b57\u6bb5<\/h2>\n\n\n\n<p>\u8003\u8bd5\u91cc\u4e00\u770b\u5230\u201cIP \u6570\u636e\u62a5\u5206\u6790\u201d\uff0c\u901a\u5e38\u5c31\u662f\u4ece\u8fd9\u4e9b\u5b57\u6bb5\u4e0b\u624b\uff1a<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b2c\u4e00\u7c7b\uff1a\u957f\u5ea6\u76f8\u5173<\/h3>\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>\u6570\u636e\u90e8\u5206\u957f\u5ea6 = \u603b\u957f\u5ea6 &#8211; \u9996\u90e8\u957f\u5ea6<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b2c\u4e8c\u7c7b\uff1a\u5206\u7247\u76f8\u5173<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u6807\u8bc6<\/li>\n\n\n\n<li>DF<\/li>\n\n\n\n<li>MF<\/li>\n\n\n\n<li>\u7247\u504f\u79fb<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b2c\u4e09\u7c7b\uff1a\u4e0a\u5c42\u534f\u8bae\u8bc6\u522b<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Protocol = 1 \u2192 ICMP<\/li>\n\n\n\n<li>Protocol = 6 \u2192 TCP<\/li>\n\n\n\n<li>Protocol = 17 \u2192 UDP<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b2c\u56db\u7c7b\uff1a\u751f\u5b58\u4e0e\u6821\u9a8c<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>TTL<\/li>\n\n\n\n<li>\u9996\u90e8\u68c0\u9a8c\u548c<\/li>\n<\/ul>\n\n\n\n<p>\u6240\u4ee5\u505a\u9898\u7684\u987a\u5e8f\u4e00\u822c\u662f\uff1a<\/p>\n\n\n\n<p><strong>\u5148\u770b\u9996\u90e8\u957f\u5ea6\u548c\u603b\u957f\u5ea6\uff0c\u518d\u770b\u662f\u5426\u5206\u7247\uff0c\u518d\u770b\u534f\u8bae\u5b57\u6bb5\u8bc6\u522b\u4e0a\u5c42\u534f\u8bae\uff0c\u6700\u540e\u770b TTL \u548c\u5730\u5740\u4fe1\u606f\u3002<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">IP \u5206\u7247\u76f8\u5173\u9996\u90e8\u5b57\u6bb5<\/h2>\n\n\n\n<p>\u4f60\u8fd9\u91cc\u5199\u7684\u201cIP\u5206\u8fa8\u76f8\u5173\u9996\u90e8\u5b57\u6bb5\u201d\uff0c\u7ed3\u5408\u4e0a\u4e0b\u6587\uff0c\u8003\u7814\u91cc\u901a\u5e38\u6307\u7684\u5c31\u662f<strong>IP \u5206\u7247\u76f8\u5173\u5b57\u6bb5<\/strong>\u3002\u8fd9\u4e00\u5757\u975e\u5e38\u9ad8\u9891\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u5206\u7247\u4f1a\u5728\u4ec0\u4e48\u60c5\u51b5\u4e0b\u53d1\u751f<\/h3>\n\n\n\n<p>\u5f53 IP \u6570\u636e\u62a5\u957f\u5ea6 <strong>\u5927\u4e8e\u4e0b\u4e00\u8df3\u94fe\u8def\u7684 MTU<\/strong> \u65f6\uff0c\u5982\u679c DF = 0\uff0c\u5219\u53ef\u4ee5\u5206\u7247\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u54ea\u4e9b\u8bbe\u5907\u4f1a\u5206\u7247\u3001\u54ea\u4e9b\u8bbe\u5907\u4f1a\u91cd\u7ec4<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u6e90\u4e3b\u673a<\/strong>\u53ef\u80fd\u5206\u7247<\/li>\n\n\n\n<li><strong>\u4e2d\u95f4\u8def\u7531\u5668<\/strong>\u5728 IPv4 \u4e2d\u4e5f\u53ef\u80fd\u5206\u7247<\/li>\n\n\n\n<li><strong>\u76ee\u7684\u4e3b\u673a<\/strong>\u8d1f\u8d23\u91cd\u7ec4<\/li>\n\n\n\n<li>\u4e2d\u95f4\u8def\u7531\u5668<strong>\u4e0d\u8d1f\u8d23\u91cd\u7ec4<\/strong><\/li>\n<\/ul>\n\n\n\n<p>\u8fd9\u662f\u7ecf\u5178\u9009\u62e9\u9898\u70b9\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u5206\u7247\u76f8\u5173\u5b57\u6bb5\u53ca\u4f5c\u7528<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">1. \u6807\u8bc6 Identification<\/h4>\n\n\n\n<p>\u540c\u4e00\u4e2a\u539f\u59cb IP \u6570\u636e\u62a5\u5206\u51fa\u6765\u7684\u6240\u6709\u7247\uff0c<strong>\u6807\u8bc6\u5b57\u6bb5\u90fd\u76f8\u540c<\/strong>\u3002<br>\u76ee\u7684\u4e3b\u673a\u9760\u5b83\u5224\u65ad\u54ea\u4e9b\u7247\u5c5e\u4e8e\u540c\u4e00\u539f\u59cb\u62a5\u6587\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">2. \u6807\u5fd7 Flags<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li>DF = 1\uff1a\u4e0d\u80fd\u5206\u7247<\/li>\n\n\n\n<li>MF = 1\uff1a\u540e\u9762\u8fd8\u6709\u5206\u7247<\/li>\n\n\n\n<li>MF = 0\uff1a\u6700\u540e\u4e00\u4e2a\u5206\u7247<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\">3. \u7247\u504f\u79fb Fragment Offset<\/h4>\n\n\n\n<p>\u8868\u793a\u672c\u5206\u7247\u6570\u636e\u90e8\u5206\u5728\u539f\u59cb\u6570\u636e\u4e2d\u7684\u8d77\u59cb\u4f4d\u7f6e\uff0c\u5355\u4f4d\u662f <strong>8B<\/strong>\u3002<\/p>\n\n\n\n<p>\u8fd9\u610f\u5473\u7740\uff1a<\/p>\n\n\n\n<p><strong>\u9664\u6700\u540e\u4e00\u4e2a\u5206\u7247\u5916\uff0c\u5176\u4f59\u5404\u5206\u7247\u7684\u6570\u636e\u957f\u5ea6\u901a\u5e38\u5fc5\u987b\u662f 8B \u7684\u6574\u6570\u500d\u3002<\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u5206\u7247\u8ba1\u7b97\u9898\u600e\u4e48\u505a<\/h3>\n\n\n\n<p>\u5047\u8bbe\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u539f\u59cb IP \u6570\u636e\u62a5\u603b\u957f\u5ea6 = 4000B<\/li>\n\n\n\n<li>\u9996\u90e8\u957f\u5ea6 = 20B<\/li>\n\n\n\n<li>\u6570\u636e\u90e8\u5206 = 3980B<\/li>\n\n\n\n<li>MTU = 1500B<\/li>\n<\/ul>\n\n\n\n<p>\u5219\u6bcf\u7247\u6700\u591a\u80fd\u88c5\u7684\u6570\u636e\u91cf\uff1a<\/p>\n\n\n\n<p><code>1500 - 20 = 1480B<\/code><\/p>\n\n\n\n<p>\u56e0\u4e3a 1480 \u6b63\u597d\u662f 8 \u7684\u6574\u6570\u500d\uff0c\u6240\u4ee5\u53ef\u4ee5\u76f4\u63a5\u7528\u3002<\/p>\n\n\n\n<p>\u4e8e\u662f\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u7b2c 1 \u7247\u6570\u636e 1480B\uff0c\u7247\u504f\u79fb = 0<\/li>\n\n\n\n<li>\u7b2c 2 \u7247\u6570\u636e 1480B\uff0c\u7247\u504f\u79fb = 1480 \/ 8 = 185<\/li>\n\n\n\n<li>\u5269\u4f59\u6570\u636e <code>3980 - 1480 - 1480 = 1020B<\/code><\/li>\n\n\n\n<li>\u7b2c 3 \u7247\u6570\u636e 1020B\uff0c\u7247\u504f\u79fb = <code>(1480 + 1480) \/ 8 = 370<\/code><\/li>\n<\/ul>\n\n\n\n<p>\u5bf9\u5e94\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u524d\u4e24\u7247 MF = 1<\/li>\n\n\n\n<li>\u6700\u540e\u4e00\u7247 MF = 0<\/li>\n\n\n\n<li>\u4e09\u7247\u7684\u6807\u8bc6\u90fd\u76f8\u540c<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u5206\u7247\u9898\u6700\u5e38\u9519\u7684\u5730\u65b9<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">\u9519\u8bef 1\uff1a\u628a\u7247\u504f\u79fb\u5f53\u6210\u5b57\u8282\u6570<\/h4>\n\n\n\n<p>\u7247\u504f\u79fb\u5355\u4f4d\u4e0d\u662f\u5b57\u8282\uff0c\u800c\u662f <strong>8B<\/strong>\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u9519\u8bef 2\uff1a\u628a\u603b\u957f\u5ea6\u548c\u6570\u636e\u957f\u5ea6\u6df7\u4e86<\/h4>\n\n\n\n<p>\u603b\u957f\u5ea6 = \u9996\u90e8 + \u6570\u636e\u3002<br>\u5206\u7247\u65f6\u5148\u7b97\u6bcf\u7247\u80fd\u88c5\u591a\u5c11\u6570\u636e\uff0c\u518d\u52a0\u9996\u90e8\u6c42\u6bcf\u7247\u603b\u957f\u5ea6\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u9519\u8bef 3\uff1a\u4ee5\u4e3a\u6bcf\u7247\u9996\u90e8\u53ea\u4fdd\u7559\u4e00\u6b21<\/h4>\n\n\n\n<p>\u9519\u3002<strong>\u6bcf\u4e2a\u5206\u7247\u90fd\u6709\u81ea\u5df1\u7684 IP \u9996\u90e8\u3002<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">ABC \u4e09\u7c7b\u5730\u5740\u600e\u4e48\u8bb0<\/h2>\n\n\n\n<p>\u8fd9\u662f\u4f20\u7edf\u5206\u7c7b\u7f16\u5740\uff0c\u867d\u7136\u73b0\u5728\u5b9e\u9645\u66f4\u591a\u8bb2 CIDR\uff0c\u4f46\u8003\u7814\u4ecd\u7ecf\u5e38\u8003\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">A\u3001B\u3001C \u7c7b\u5730\u5740\u8303\u56f4<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u7c7b\u522b<\/th><th>\u7b2c\u4e00\u5b57\u8282\u8303\u56f4<\/th><th>\u7f51\u7edc\u53f7\u4f4d\u6570<\/th><th>\u4e3b\u673a\u53f7\u4f4d\u6570<\/th><th>\u9ed8\u8ba4\u5b50\u7f51\u63a9\u7801<\/th><\/tr><\/thead><tbody><tr><td>A \u7c7b<\/td><td>1~126<\/td><td>8<\/td><td>24<\/td><td>255.0.0.0<\/td><\/tr><tr><td>B \u7c7b<\/td><td>128~191<\/td><td>16<\/td><td>16<\/td><td>255.255.0.0<\/td><\/tr><tr><td>C \u7c7b<\/td><td>192~223<\/td><td>24<\/td><td>8<\/td><td>255.255.255.0<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>\u8865\u5145\u4e24\u4e2a\u8fb9\u754c\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>127.x.x.x\uff1a\u4fdd\u7559\u4f5c<strong>\u56de\u9001\u5730\u5740<\/strong>\uff0c\u4e0d\u662f\u666e\u901a A \u7c7b\u53ef\u5206\u914d\u5730\u5740<\/li>\n\n\n\n<li>0.x.x.x\uff1a\u8868\u793a\u201c\u672c\u7f51\u7edc\u201d\uff0c\u4e5f\u4e0d\u4f5c\u666e\u901a\u4e3b\u673a\u5730\u5740\u5206\u914d<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u5feb\u901f\u5224\u65ad\u53e3\u8bc0<\/h3>\n\n\n\n<p>\u770b\u7b2c\u4e00\u5b57\u8282\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>1~126 \u2192 A \u7c7b<\/li>\n\n\n\n<li>128~191 \u2192 B \u7c7b<\/li>\n\n\n\n<li>192~223 \u2192 C \u7c7b<\/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\">\u5b50\u7f51\u63a9\u7801\u662f\u4ec0\u4e48\uff0c\u9ed8\u8ba4\u6709\u54ea\u4e9b<\/h2>\n\n\n\n<p>\u5b50\u7f51\u63a9\u7801\u7684\u4f5c\u7528\u662f\uff1a<strong>\u628a\u4e00\u4e2a IP \u5730\u5740\u5212\u5206\u4e3a\u201c\u7f51\u7edc\u90e8\u5206\u201d\u548c\u201c\u4e3b\u673a\u90e8\u5206\u201d\u3002<\/strong><\/p>\n\n\n\n<p>\u5199\u6cd5\u5982\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>255.0.0.0<\/li>\n\n\n\n<li>255.255.0.0<\/li>\n\n\n\n<li>255.255.255.0<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u9ed8\u8ba4\u5b50\u7f51\u63a9\u7801<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>A \u7c7b\u9ed8\u8ba4\uff1a255.0.0.0<\/li>\n\n\n\n<li>B \u7c7b\u9ed8\u8ba4\uff1a255.255.0.0<\/li>\n\n\n\n<li>C \u7c7b\u9ed8\u8ba4\uff1a255.255.255.0<\/li>\n<\/ul>\n\n\n\n<p>\u8003\u8bd5\u91cc\u8bf4\u201c\u9ed8\u8ba4\u5b50\u7f51\u63a9\u7801\u201d\uff0c\u901a\u5e38\u5c31\u662f\u6307\u8fd9\u4e09\u4e2a\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u5982\u4f55\u5229\u7528 IP \u5730\u5740\u548c\u5b50\u7f51\u63a9\u7801\u6c42\u5b50\u7f51\u5730\u5740<\/h2>\n\n\n\n<p>\u8fd9\u662f\u7f51\u7edc\u5c42\u8ba1\u7b97\u9898\u6700\u57fa\u7840\u7684\u4e00\u7c7b\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u89c4\u5219<\/h3>\n\n\n\n<p><strong>\u5b50\u7f51\u5730\u5740 = IP \u5730\u5740 AND \u5b50\u7f51\u63a9\u7801<\/strong><\/p>\n\n\n\n<p>\u4e5f\u5c31\u662f\u6309\u4f4d\u4e0e\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u4f8b\u5b50 1<\/h3>\n\n\n\n<p>IP \u5730\u5740\uff1a192.168.1.130<br>\u5b50\u7f51\u63a9\u7801\uff1a255.255.255.192<\/p>\n\n\n\n<p>\u5148\u770b\u6700\u540e\u4e00\u4e2a\u5b57\u8282\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>IP \u6700\u540e\u4e00\u4e2a\u5b57\u8282\uff1a130<br>\u4e8c\u8fdb\u5236\uff1a10000010<\/li>\n\n\n\n<li>\u63a9\u7801\u6700\u540e\u4e00\u4e2a\u5b57\u8282\uff1a192<br>\u4e8c\u8fdb\u5236\uff1a11000000<\/li>\n<\/ul>\n\n\n\n<p>\u6309\u4f4d\u4e0e\uff1a<\/p>\n\n\n\n<p><code>10000010 AND 11000000 = 10000000<\/code><\/p>\n\n\n\n<p>\u5373 128<\/p>\n\n\n\n<p>\u6240\u4ee5\u5b50\u7f51\u5730\u5740\u4e3a\uff1a<\/p>\n\n\n\n<p><code>192.168.1.128<\/code><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u4f8b\u5b50 2<\/h3>\n\n\n\n<p>IP \u5730\u5740\uff1a172.16.10.66<br>\u5b50\u7f51\u63a9\u7801\uff1a255.255.255.224<\/p>\n\n\n\n<p>224 \u5bf9\u5e94\u4e8c\u8fdb\u5236\u662f <code>11100000<\/code>\uff0c\u5757\u5927\u5c0f\u662f <code>256 - 224 = 32<\/code><\/p>\n\n\n\n<p>\u4e8e\u662f\u5b50\u7f51\u6bb5\u6309 32 \u9012\u589e\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>0~31<\/li>\n\n\n\n<li>32~63<\/li>\n\n\n\n<li>64~95<\/li>\n\n\n\n<li>96~127<br>\u2026\u2026<\/li>\n<\/ul>\n\n\n\n<p>66 \u843d\u5728 64~95 \u8fd9\u4e00\u6bb5\uff0c\u6240\u4ee5\u5b50\u7f51\u5730\u5740\u662f\uff1a<\/p>\n\n\n\n<p><code>172.16.10.64<\/code><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u505a\u9898\u66f4\u5feb\u7684\u65b9\u6cd5\uff1a\u5757\u5927\u5c0f\u6cd5<\/h3>\n\n\n\n<p>\u82e5\u63a9\u7801\u6700\u540e\u4e00\u4e2a\u5b57\u8282\u662f\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>128 \u2192 \u5757\u5927\u5c0f 128<\/li>\n\n\n\n<li>192 \u2192 \u5757\u5927\u5c0f 64<\/li>\n\n\n\n<li>224 \u2192 \u5757\u5927\u5c0f 32<\/li>\n\n\n\n<li>240 \u2192 \u5757\u5927\u5c0f 16<\/li>\n\n\n\n<li>248 \u2192 \u5757\u5927\u5c0f 8<\/li>\n\n\n\n<li>252 \u2192 \u5757\u5927\u5c0f 4<\/li>\n<\/ul>\n\n\n\n<p>\u7136\u540e\u770b IP \u843d\u5728\u54ea\u4e2a\u5757\u91cc\uff0c\u5757\u8d77\u70b9\u5c31\u662f\u5b50\u7f51\u5730\u5740\u3002<\/p>\n\n\n\n<p>\u8fd9\u4e2a\u65b9\u6cd5\u5728\u8003\u573a\u4e0a\u6bd4\u9010\u4f4d\u8f6c\u4e8c\u8fdb\u5236\u66f4\u5feb\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">CIDR \u662f\u4ec0\u4e48<\/h2>\n\n\n\n<p>CIDR \u662f<strong>\u65e0\u5206\u7c7b\u57df\u95f4\u8def\u7531\u9009\u62e9<\/strong>\u3002<br>\u6838\u5fc3\u601d\u60f3\u5c31\u662f\uff1a<strong>\u4e0d\u518d\u6b7b\u5b88 A\/B\/C \u7c7b\uff0c\u800c\u662f\u76f4\u63a5\u7528\u201c\u7f51\u7edc\u524d\u7f00\u957f\u5ea6\u201d\u6765\u8868\u793a\u7f51\u7edc\u3002<\/strong><\/p>\n\n\n\n<p>\u4f8b\u5982\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>192.168.1.0\/24<\/li>\n\n\n\n<li>10.0.0.0\/8<\/li>\n\n\n\n<li>172.16.0.0\/20<\/li>\n<\/ul>\n\n\n\n<p>\u8fd9\u91cc <code>\/24<\/code> \u5c31\u8868\u793a\u524d 24 \u4f4d\u662f\u7f51\u7edc\u524d\u7f00\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">CIDR \u5730\u5740\u5757\u600e\u4e48\u7406\u89e3<\/h3>\n\n\n\n<p>\u4e00\u4e2a CIDR \u5730\u5740\u5757\uff0c\u672c\u8d28\u4e0a\u662f\uff1a<\/p>\n\n\n\n<p><strong>\u7f51\u7edc\u524d\u7f00\u76f8\u540c\u7684\u4e00\u7ec4\u8fde\u7eed IP \u5730\u5740\u3002<\/strong><\/p>\n\n\n\n<p>\u4f8b\u5982\uff1a<\/p>\n\n\n\n<p><code>192.168.1.0\/24<\/code><\/p>\n\n\n\n<p>\u8868\u793a\u524d 24 \u4f4d\u76f8\u540c\uff0c\u6240\u4ee5\u5171\u6709 <code>2^(32-24) = 256<\/code> \u4e2a\u5730\u5740\uff0c\u8303\u56f4\u662f\uff1a<\/p>\n\n\n\n<p><code>192.168.1.0 ~ 192.168.1.255<\/code><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">CIDR \u7684\u610f\u4e49<\/h3>\n\n\n\n<p>\u5b83\u89e3\u51b3\u4e86\u4f20\u7edf\u5206\u7c7b\u7f16\u5740\u7684\u4e24\u4e2a\u95ee\u9898\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u5730\u5740\u5206\u914d\u4e0d\u591f\u7075\u6d3b<\/li>\n\n\n\n<li>\u8def\u7531\u8868\u5bb9\u6613\u81a8\u80c0<\/li>\n<\/ol>\n\n\n\n<p>\u4e8e\u662f\u5c31\u5f15\u51fa\u4e86\u4e24\u4e2a\u9ad8\u9891\u70b9\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u5730\u5740\u5757\u5206\u914d<\/strong><\/li>\n\n\n\n<li><strong>\u8def\u7531\u805a\u5408<\/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\">\u8def\u7531\u805a\u5408\u600e\u4e48\u7406\u89e3<\/h2>\n\n\n\n<p>\u8def\u7531\u805a\u5408\u4e5f\u53eb<strong>\u6784\u6210\u8d85\u7f51<\/strong>\u3002<br>\u5b83\u7684\u6838\u5fc3\u5c31\u662f\u628a\u591a\u4e2a\u7f51\u7edc\u524d\u7f00\u76f8\u540c\u7684\u8fde\u7eed\u5b50\u7f51\uff0c\u5408\u5e76\u6210\u4e00\u6761\u66f4\u5927\u7684\u8def\u7531\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u4f8b\u5b50<\/h3>\n\n\n\n<p>\u6709\u56db\u4e2a\u8fde\u7eed C \u7c7b\u7f51\u7edc\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>202.38.64.0\/24<\/li>\n\n\n\n<li>202.38.65.0\/24<\/li>\n\n\n\n<li>202.38.66.0\/24<\/li>\n\n\n\n<li>202.38.67.0\/24<\/li>\n<\/ul>\n\n\n\n<p>\u8fd9\u56db\u4e2a\u7f51\u7edc\u53ef\u4ee5\u805a\u5408\u6210\uff1a<\/p>\n\n\n\n<p><code>202.38.64.0\/22<\/code><\/p>\n\n\n\n<p>\u56e0\u4e3a \/22 \u8868\u793a\u524d 22 \u4f4d\u76f8\u540c\uff0c\u6b63\u597d\u8986\u76d6\u8fd9\u56db\u4e2a \/24 \u7f51\u7edc\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u8def\u7531\u805a\u5408\u7684\u4f5c\u7528<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u51cf\u5c11\u8def\u7531\u8868\u9879\u6570\u91cf<\/li>\n\n\n\n<li>\u63d0\u9ad8\u8def\u7531\u67e5\u627e\u6548\u7387<\/li>\n\n\n\n<li>\u51cf\u8f7b\u8def\u7531\u5668\u8d1f\u62c5<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u805a\u5408\u9898\u600e\u4e48\u505a<\/h3>\n\n\n\n<p>\u770b\u591a\u4e2a\u7f51\u7edc\u5730\u5740\u7684\u4e8c\u8fdb\u5236\u8868\u793a\uff0c\u627e\u5b83\u4eec<strong>\u5171\u540c\u524d\u7f00\u6700\u957f\u6709\u591a\u5c11\u4f4d<\/strong>\uff0c\u5c31\u5f97\u5230\u805a\u5408\u540e\u7684\u524d\u7f00\u957f\u5ea6\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u6700\u957f\u524d\u7f00\u5339\u914d\u662f\u4ec0\u4e48<\/h2>\n\n\n\n<p>CIDR \u4e0b\uff0c\u8def\u7531\u8868\u53ef\u80fd\u540c\u65f6\u5b58\u5728\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>128.14.0.0\/16<\/li>\n\n\n\n<li>128.14.35.0\/24<\/li>\n\n\n\n<li>128.14.35.128\/25<\/li>\n<\/ul>\n\n\n\n<p>\u5982\u679c\u4e00\u4e2a\u5206\u7ec4\u76ee\u6807\u5730\u5740\u662f <code>128.14.35.130<\/code>\uff0c\u5b83\u540c\u65f6\u5339\u914d\u4e0a\u9762\u4e09\u6761\u8def\u7531\u3002<br>\u8fd9\u65f6\u8def\u7531\u5668\u8be5\u9009\u54ea\u6761\uff1f<\/p>\n\n\n\n<p>\u7b54\u6848\u662f\uff1a<\/p>\n\n\n\n<p><strong>\u9009\u524d\u7f00\u6700\u957f\u3001\u6700\u5177\u4f53\u7684\u90a3\u6761\u3002<\/strong><\/p>\n\n\n\n<p>\u4e5f\u5c31\u662f <code>\/25<\/code>\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u4e3a\u4ec0\u4e48\u5fc5\u987b\u6700\u957f\u524d\u7f00\u5339\u914d<\/h3>\n\n\n\n<p>\u56e0\u4e3a\u524d\u7f00\u8d8a\u957f\uff0c\u5339\u914d\u8303\u56f4\u8d8a\u5c0f\uff0c\u8def\u7531\u8d8a\u7cbe\u786e\u3002<br>\u8fd9\u662f CIDR \u8def\u7531\u67e5\u627e\u7684\u57fa\u672c\u539f\u5219\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u5e38\u89c1\u8bef\u533a<\/h3>\n\n\n\n<p>\u4e0d\u662f\u201c\u5148\u5339\u914d\u5230\u54ea\u6761\u5c31\u7528\u54ea\u6761\u201d\uff0c\u4e5f\u4e0d\u662f\u201c\u6309\u5148\u540e\u987a\u5e8f\u201d\u3002<br>\u8003\u8bd5\u6807\u51c6\u7b54\u6848\u662f\uff1a<strong>\u6700\u957f\u524d\u7f00\u5339\u914d\u3002<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u5b9a\u957f\u5b50\u7f51\u5212\u5206\u600e\u4e48\u505a<\/h2>\n\n\n\n<p>\u5b9a\u957f\u5b50\u7f51\u63a9\u7801\uff0c\u5c31\u662f\u628a\u4e00\u4e2a\u7f51\u7edc\u5212\u5206\u6210\u82e5\u5e72\u4e2a<strong>\u5927\u5c0f\u76f8\u540c<\/strong>\u7684\u5b50\u7f51\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u505a\u9898\u4e3b\u7ebf<\/h3>\n\n\n\n<p>\u5b9a\u957f\u5b50\u7f51\u5212\u5206\u4e00\u822c\u6709\u4e24\u79cd\u95ee\u6cd5\uff1a<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">1. \u5df2\u77e5\u8981\u5212\u5206\u7684\u5b50\u7f51\u6570\uff0c\u6c42\u501f\u51e0\u4f4d<\/h4>\n\n\n\n<p>\u8bbe\u501f\u4e86 n \u4f4d\uff0c\u5219\u53ef\u5212\u5206\u5b50\u7f51\u6570\u4e3a\uff1a<\/p>\n\n\n\n<p><code>2^n<\/code><\/p>\n\n\n\n<p>\u6709\u7684\u6559\u6750\u4f1a\u8003\u8651\u5168 0 \u548c\u5168 1 \u5b50\u7f51\u80fd\u5426\u4f7f\u7528\u7684\u95ee\u9898\uff0c\u4f46\u73b0\u5728\u8003\u8bd5\u4e00\u822c\u9ed8\u8ba4<strong>\u53ef\u7528<\/strong>\uff0c\u9664\u975e\u9898\u76ee\u7279\u522b\u8bf4\u660e\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">2. \u5df2\u77e5\u6bcf\u4e2a\u5b50\u7f51\u8981\u5bb9\u7eb3\u7684\u4e3b\u673a\u6570\uff0c\u6c42\u4e3b\u673a\u4f4d\u81f3\u5c11\u4fdd\u7559\u591a\u5c11\u4f4d<\/h4>\n\n\n\n<p>\u82e5\u4e3b\u673a\u4f4d\u4fdd\u7559 h \u4f4d\uff0c\u5219\u53ef\u7528\u4e3b\u673a\u6570\u901a\u5e38\u4e3a\uff1a<\/p>\n\n\n\n<p><code>2^h - 2<\/code><\/p>\n\n\n\n<p>\u51cf 2 \u662f\u56e0\u4e3a\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5168 0 \u4e3b\u673a\u53f7\u8868\u793a\u8be5\u5b50\u7f51\u7f51\u7edc\u5730\u5740<\/li>\n\n\n\n<li>\u5168 1 \u4e3b\u673a\u53f7\u8868\u793a\u8be5\u5b50\u7f51\u5e7f\u64ad\u5730\u5740<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u4f8b\u5b50<\/h3>\n\n\n\n<p>\u67d0 C \u7c7b\u7f51\u7edc <code>192.168.1.0\/24<\/code>\uff0c\u8981\u6c42\u5212\u6210 4 \u4e2a\u5b50\u7f51\u3002<\/p>\n\n\n\n<p>\u56e0\u4e3a 4 = <code>2^2<\/code>\uff0c\u501f 2 \u4f4d\uff0c\u5f97\u5230\uff1a<\/p>\n\n\n\n<p><code>\/26<\/code><\/p>\n\n\n\n<p>\u5b50\u7f51\u63a9\u7801\u53d8\u4e3a\uff1a<\/p>\n\n\n\n<p><code>255.255.255.192<\/code><\/p>\n\n\n\n<p>\u56db\u4e2a\u5b50\u7f51\u5206\u522b\u662f\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>192.168.1.0\/26<\/li>\n\n\n\n<li>192.168.1.64\/26<\/li>\n\n\n\n<li>192.168.1.128\/26<\/li>\n\n\n\n<li>192.168.1.192\/26<\/li>\n<\/ul>\n\n\n\n<p>\u6bcf\u4e2a\u5b50\u7f51\u5730\u5740\u6570 <code>2^(32-26)=64<\/code>\uff0c\u53ef\u7528\u4e3b\u673a\u6570 62\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u53d8\u957f\u5b50\u7f51\u63a9\u7801 VLSM \u600e\u4e48\u7406\u89e3<\/h2>\n\n\n\n<p>VLSM \u5c31\u662f<strong>\u4e0d\u540c\u5b50\u7f51\u4f7f\u7528\u4e0d\u540c\u957f\u5ea6\u7684\u63a9\u7801<\/strong>\u3002<br>\u5b83\u7684\u76ee\u7684\u662f\uff1a<strong>\u66f4\u7701\u5730\u5740<\/strong>\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u4e3a\u4ec0\u4e48\u8981\u7528 VLSM<\/h3>\n\n\n\n<p>\u5b9a\u957f\u5212\u5206\u7b80\u5355\uff0c\u4f46\u5bb9\u6613\u6d6a\u8d39\u5730\u5740\u3002<br>\u5982\u679c\u4e00\u4e2a\u5b50\u7f51\u53ea\u9700\u8981 10 \u53f0\u4e3b\u673a\uff0c\u53e6\u4e00\u4e2a\u9700\u8981 100 \u53f0\u4e3b\u673a\uff0c\u90fd\u7ed9\u4e00\u6837\u5927\u7684\u5730\u5740\u5757\uff0c\u5c31\u4f1a\u6d6a\u8d39\u5f88\u591a\u3002<\/p>\n\n\n\n<p>VLSM \u7684\u601d\u60f3\u662f\uff1a<\/p>\n\n\n\n<p><strong>\u6309\u9700\u6c42\u5927\u5c0f\u5206\u914d\uff0c\u5148\u5206\u5927\u7684\uff0c\u518d\u5206\u5c0f\u7684\u3002<\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">VLSM \u505a\u9898\u6b65\u9aa4<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u5148\u628a\u5404\u5b50\u7f51\u6309\u4e3b\u673a\u9700\u6c42\u4ece\u5927\u5230\u5c0f\u6392\u5e8f<\/li>\n\n\n\n<li>\u7ed9\u9700\u6c42\u6700\u5927\u7684\u5b50\u7f51\u5148\u5206\u914d<\/li>\n\n\n\n<li>\u6bcf\u6b21\u5206\u914d\u5730\u5740\u5757\u5927\u5c0f\u90fd\u6309 2 \u7684\u5e42\u53d6\u6574<\/li>\n\n\n\n<li>\u540e\u7eed\u5b50\u7f51\u4ece\u4e0b\u4e00\u4e2a\u53ef\u7528\u7f51\u7edc\u5730\u5740\u7ee7\u7eed\u5206<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\">\u4f8b\u5b50<\/h3>\n\n\n\n<p>\u73b0\u6709\u5730\u5740\u5757\uff1a<code>192.168.1.0\/24<\/code><\/p>\n\n\n\n<p>\u9700\u8981\u5206\u7ed9\u4e09\u4e2a\u5b50\u7f51\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5b50\u7f51 A\uff1a100 \u53f0\u4e3b\u673a<\/li>\n\n\n\n<li>\u5b50\u7f51 B\uff1a50 \u53f0\u4e3b\u673a<\/li>\n\n\n\n<li>\u5b50\u7f51 C\uff1a20 \u53f0\u4e3b\u673a<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\">\u7b2c\u4e00\u6b65\uff1a\u786e\u5b9a\u6240\u9700\u5730\u5740\u5757\u5927\u5c0f<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li>100 \u53f0\u4e3b\u673a \u2192 \u81f3\u5c11 7 \u4f4d\u4e3b\u673a\u4f4d\uff0c\u56e0\u4e3a <code>2^7 - 2 = 126<\/code><br>\u6240\u4ee5\u524d\u7f00\u662f <code>\/25<\/code><\/li>\n\n\n\n<li>50 \u53f0\u4e3b\u673a \u2192 \u81f3\u5c11 6 \u4f4d\u4e3b\u673a\u4f4d\uff0c\u56e0\u4e3a <code>2^6 - 2 = 62<\/code><br>\u6240\u4ee5\u524d\u7f00\u662f <code>\/26<\/code><\/li>\n\n\n\n<li>20 \u53f0\u4e3b\u673a \u2192 \u81f3\u5c11 5 \u4f4d\u4e3b\u673a\u4f4d\uff0c\u56e0\u4e3a <code>2^5 - 2 = 30<\/code><br>\u6240\u4ee5\u524d\u7f00\u662f <code>\/27<\/code><\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\">\u7b2c\u4e8c\u6b65\uff1a\u6309\u5927\u5230\u5c0f\u5206\u914d<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li>A\uff1a192.168.1.0\/25<\/li>\n\n\n\n<li>B\uff1a192.168.1.128\/26<\/li>\n\n\n\n<li>C\uff1a192.168.1.192\/27<\/li>\n<\/ul>\n\n\n\n<p>\u8fd9\u6837\u6bd4\u5b9a\u957f\u5212\u5206\u66f4\u7701\u5730\u5740\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">VLSM \u6700\u5bb9\u6613\u9519\u7684\u5730\u65b9<\/h3>\n\n\n\n<p>\u4e0d\u662f\u201c\u968f\u4fbf\u5207\u201d\uff0c\u800c\u662f\u4e00\u5b9a\u8981\uff1a<\/p>\n\n\n\n<p><strong>\u5148\u6392\u9700\u6c42\u5927\u5c0f\uff0c\u518d\u6309\u5757\u8fb9\u754c\u5bf9\u9f50\u3002<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">NAT \u662f\u4ec0\u4e48<\/h2>\n\n\n\n<p>NAT \u662f<strong>\u7f51\u7edc\u5730\u5740\u8f6c\u6362<\/strong>\u3002<br>\u672c\u8d28\u4e0a\u662f\u628a<strong>\u79c1\u6709 IP \u5730\u5740<\/strong>\u8f6c\u6362\u6210<strong>\u516c\u7f51 IP \u5730\u5740<\/strong>\uff0c\u4ee5\u5b9e\u73b0\u79c1\u7f51\u4e3b\u673a\u8bbf\u95ee\u516c\u7f51\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u4e3a\u4ec0\u4e48\u9700\u8981 NAT<\/h3>\n\n\n\n<p>IPv4 \u5730\u5740\u4e0d\u591f\u7528\u3002<br>\u5982\u679c\u6bcf\u53f0\u5185\u7f51\u4e3b\u673a\u90fd\u76f4\u63a5\u5206\u914d\u516c\u7f51\u5730\u5740\uff0c\u6839\u672c\u4e0d\u591f\u3002<\/p>\n\n\n\n<p>\u6240\u4ee5\u5bb6\u5ead\u3001\u5b66\u6821\u3001\u516c\u53f8\u5185\u90e8\u5e38\u7528\u79c1\u6709\u5730\u5740\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>10.0.0.0\/8<\/li>\n\n\n\n<li>172.16.0.0\/12<\/li>\n\n\n\n<li>192.168.0.0\/16<\/li>\n<\/ul>\n\n\n\n<p>\u8fd9\u4e9b\u79c1\u6709\u5730\u5740\u4e0d\u80fd\u76f4\u63a5\u5728\u516c\u7f51\u4e2d\u8def\u7531\uff0c\u9700\u8981\u901a\u8fc7 NAT \u8f6c\u6362\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">NAT \u7684\u57fa\u672c\u8fc7\u7a0b<\/h3>\n\n\n\n<p>\u5185\u7f51\u4e3b\u673a\u53d1\u6570\u636e\u5230\u516c\u7f51\u65f6\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u4e3b\u673a\u6e90\u5730\u5740\u662f\u79c1\u6709 IP<\/li>\n\n\n\n<li>\u5230\u8fbe NAT \u8def\u7531\u5668<\/li>\n\n\n\n<li>NAT \u8bbe\u5907\u628a\u6e90\u79c1\u6709 IP \u6539\u6210\u516c\u7f51 IP<\/li>\n\n\n\n<li>\u540c\u65f6\u8bb0\u5f55\u7aef\u53e3\u6620\u5c04\u5173\u7cfb<\/li>\n\n\n\n<li>\u5916\u7f51\u8fd4\u56de\u6570\u636e\u65f6\uff0c\u518d\u6839\u636e\u6620\u5c04\u8868\u8fd8\u539f\u7ed9\u5bf9\u5e94\u5185\u7f51\u4e3b\u673a<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\">NAPT\/PAT<\/h3>\n\n\n\n<p>\u8003\u8bd5\u91cc\u66f4\u5e38\u89c1\u7684\u662f<strong>\u7aef\u53e3\u590d\u7528\u578b NAT<\/strong>\uff0c\u4e5f\u53eb NAPT \u6216 PAT\u3002<\/p>\n\n\n\n<p>\u5b83\u7684\u7279\u70b9\u662f\uff1a<\/p>\n\n\n\n<p><strong>\u591a\u4e2a\u5185\u7f51\u4e3b\u673a\u5171\u7528\u4e00\u4e2a\u516c\u7f51 IP\uff0c\u901a\u8fc7\u4e0d\u540c\u7aef\u53e3\u53f7\u533a\u5206\u4e0d\u540c\u8fde\u63a5\u3002<\/strong><\/p>\n\n\n\n<p>\u8fd9\u6b63\u662f\u5bb6\u7528\u8def\u7531\u5668\u6700\u5178\u578b\u7684\u5de5\u4f5c\u65b9\u5f0f\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">NAT \u7684\u4f18\u7f3a\u70b9<\/h3>\n\n\n\n<p>\u4f18\u70b9\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u8282\u7701\u516c\u7f51 IP<\/li>\n\n\n\n<li>\u9690\u85cf\u5185\u90e8\u7f51\u7edc\u7ed3\u6784<\/li>\n<\/ul>\n\n\n\n<p>\u7f3a\u70b9\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u4f1a\u7834\u574f\u7aef\u5230\u7aef\u900f\u660e\u6027<\/li>\n\n\n\n<li>\u67d0\u4e9b\u9700\u8981\u4e3b\u52a8\u5165\u7ad9\u8fde\u63a5\u7684\u5e94\u7528\u5904\u7406\u66f4\u590d\u6742<\/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\">ARP \u662f\u4ec0\u4e48<\/h2>\n\n\n\n<p>ARP \u662f<strong>\u5730\u5740\u89e3\u6790\u534f\u8bae<\/strong>\u3002<br>\u4f5c\u7528\u662f\uff1a<strong>\u6839\u636e IP \u5730\u5740\u627e\u51fa\u5bf9\u5e94\u7684 MAC \u5730\u5740\u3002<\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u4e3a\u4ec0\u4e48\u9700\u8981 ARP<\/h3>\n\n\n\n<p>IP \u5730\u5740\u662f\u7f51\u7edc\u5c42\u5730\u5740\uff0cMAC \u5730\u5740\u662f\u6570\u636e\u94fe\u8def\u5c42\u5730\u5740\u3002<br>\u5728\u5c40\u57df\u7f51\u91cc\u771f\u6b63\u53d1\u5e27\u65f6\uff0c\u7f51\u5361\u9700\u8981\u77e5\u9053\u76ee\u6807 MAC \u5730\u5740\uff0c\u800c\u4e0d\u662f\u53ea\u77e5\u9053\u76ee\u6807 IP \u5730\u5740\u3002<\/p>\n\n\n\n<p>\u6240\u4ee5\uff1a<\/p>\n\n\n\n<p><strong>\u8981\u628a\u201c\u4e0b\u4e00\u8df3 IP \u5730\u5740\u201d\u89e3\u6790\u6210\u201c\u4e0b\u4e00\u8df3 MAC \u5730\u5740\u201d\uff0c\u9760\u7684\u5c31\u662f ARP\u3002<\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">ARP \u5de5\u4f5c\u6d41\u7a0b<\/h3>\n\n\n\n<p>\u5047\u8bbe\u4e3b\u673a A \u8981\u7ed9\u4e3b\u673a B \u53d1\u6570\u636e\uff0c\u4e14 B \u4e0e A \u5728\u540c\u4e00\u5c40\u57df\u7f51\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>A \u5148\u67e5 ARP \u9ad8\u901f\u7f13\u5b58<\/li>\n\n\n\n<li>\u82e5\u6ca1\u6709 B \u7684 MAC\uff0cA \u5e7f\u64ad\u53d1\u9001 ARP \u8bf7\u6c42<\/li>\n\n\n\n<li>\u5c40\u57df\u7f51\u6240\u6709\u4e3b\u673a\u90fd\u6536\u5230<\/li>\n\n\n\n<li>\u53ea\u6709 IP \u5339\u914d\u7684 B \u56de\u9001 ARP \u5e94\u7b54<\/li>\n\n\n\n<li>A \u5f97\u5230 B \u7684 MAC\uff0c\u5199\u5165\u7f13\u5b58<\/li>\n\n\n\n<li>\u4e4b\u540e\u518d\u53d1\u9001\u6570\u636e\u5e27<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\">ARP \u7684\u6838\u5fc3\u8003\u70b9<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>ARP \u8bf7\u6c42\u662f\u5e7f\u64ad<\/strong><\/li>\n\n\n\n<li><strong>ARP \u5e94\u7b54\u901a\u5e38\u662f\u5355\u64ad<\/strong><\/li>\n\n\n\n<li>ARP \u53ea\u5de5\u4f5c\u5728<strong>\u4e00\u4e2a\u5c40\u57df\u7f51\u8303\u56f4\u5185<\/strong><\/li>\n\n\n\n<li>\u5982\u679c\u76ee\u6807\u4e3b\u673a\u4e0d\u5728\u672c\u7f51\u7edc\uff0cARP \u89e3\u6790\u7684\u4e0d\u662f\u76ee\u6807\u4e3b\u673a MAC\uff0c\u800c\u662f<strong>\u9ed8\u8ba4\u7f51\u5173\u63a5\u53e3\u7684 MAC<\/strong><\/li>\n<\/ul>\n\n\n\n<p>\u8fd9\u4e00\u70b9\u662f\u9ad8\u9891\u9677\u9631\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u7f51\u7edc\u5c42\u8f6c\u53d1\u5206\u7ec4\u7684\u8fc7\u7a0b<\/h2>\n\n\n\n<p>\u8fd9\u4e00\u5757\u7279\u522b\u9002\u5408\u4e32\u8054\u524d\u9762\u6240\u6709\u77e5\u8bc6\u70b9\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u60c5\u51b5\u4e00\uff1a\u76ee\u6807\u4e3b\u673a\u4e0e\u6e90\u4e3b\u673a\u5728\u540c\u4e00\u5b50\u7f51<\/h3>\n\n\n\n<p>\u4e3b\u673a\u53d1\u9001\u6570\u636e\u65f6\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u6839\u636e\u76ee\u6807 IP \u548c\u672c\u673a\u5b50\u7f51\u63a9\u7801\u8ba1\u7b97\u76ee\u6807\u7f51\u7edc\u5730\u5740<\/li>\n\n\n\n<li>\u6839\u636e\u672c\u673a IP \u548c\u5b50\u7f51\u63a9\u7801\u8ba1\u7b97\u672c\u7f51\u7edc\u5730\u5740<\/li>\n\n\n\n<li>\u82e5\u4e24\u8005\u76f8\u540c\uff0c\u8bf4\u660e\u76ee\u6807\u5728\u540c\u4e00\u7f51\u6bb5<\/li>\n\n\n\n<li>\u901a\u8fc7 ARP \u83b7\u53d6\u76ee\u6807\u4e3b\u673a MAC \u5730\u5740<\/li>\n\n\n\n<li>\u5c01\u88c5\u6210\u4ee5\u592a\u7f51\u5e27\uff0c\u76f4\u63a5\u53d1\u7ed9\u76ee\u6807\u4e3b\u673a<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\">\u60c5\u51b5\u4e8c\uff1a\u76ee\u6807\u4e3b\u673a\u4e0d\u5728\u540c\u4e00\u5b50\u7f51<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u4e3b\u673a\u6839\u636e\u5b50\u7f51\u63a9\u7801\u5224\u65ad\u76ee\u6807\u4e0d\u5728\u672c\u5730\u7f51\u6bb5<\/li>\n\n\n\n<li>\u5c06\u5206\u7ec4\u4ea4\u7ed9\u9ed8\u8ba4\u7f51\u5173<\/li>\n\n\n\n<li>\u4e3b\u673a\u901a\u8fc7 ARP \u83b7\u53d6\u9ed8\u8ba4\u7f51\u5173 MAC \u5730\u5740<\/li>\n\n\n\n<li>\u628a IP \u6570\u636e\u62a5\u5c01\u88c5\u8fdb\u94fe\u8def\u5c42\u5e27\uff0c\u76ee\u7684 MAC \u5199\u6210\u7f51\u5173 MAC<\/li>\n\n\n\n<li>\u8def\u7531\u5668\u6536\u5230\u540e\uff0c\u53bb\u6389\u94fe\u8def\u5c42\u9996\u90e8\uff0c\u67e5\u770b IP \u9996\u90e8\u4e2d\u7684\u76ee\u6807 IP<\/li>\n\n\n\n<li>\u67e5\u8def\u7531\u8868\uff0c\u6309<strong>\u6700\u957f\u524d\u7f00\u5339\u914d<\/strong>\u786e\u5b9a\u4e0b\u4e00\u8df3\u548c\u8f93\u51fa\u63a5\u53e3<\/li>\n\n\n\n<li>TTL \u51cf 1\uff0c\u91cd\u65b0\u8ba1\u7b97\u9996\u90e8\u68c0\u9a8c\u548c<\/li>\n\n\n\n<li>\u82e5\u9700\u8981\uff0c\u53ef\u80fd\u8fdb\u884c\u5206\u7247<\/li>\n\n\n\n<li>\u518d\u901a\u8fc7 ARP \u83b7\u5f97\u4e0b\u4e00\u8df3 MAC<\/li>\n\n\n\n<li>\u91cd\u65b0\u5c01\u88c5\u65b0\u7684\u94fe\u8def\u5c42\u5e27\uff0c\u7ee7\u7eed\u8f6c\u53d1<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\">\u8fd9\u91cc\u6700\u5173\u952e\u7684\u4e00\u53e5\u8bdd<\/h3>\n\n\n\n<p><strong>IP \u5730\u5740\u5728\u7aef\u5230\u7aef\u4f20\u8f93\u8fc7\u7a0b\u4e2d\u603b\u4f53\u8868\u793a\u6700\u7ec8\u76ee\u7684\u5730\uff0cMAC \u5730\u5740\u5219\u662f\u9010\u8df3\u53d8\u5316\u7684\uff0c\u53ea\u8d1f\u8d23\u5f53\u524d\u8fd9\u4e00\u8df3\u7684\u94fe\u8def\u4f20\u8f93\u3002<\/strong><\/p>\n\n\n\n<p>\u6240\u4ee5\u4e3a\u4ec0\u4e48\u5df2\u7ecf\u6709 MAC \u5730\u5740\u4e86\u8fd8\u9700\u8981 IP \u5730\u5740\uff1f<\/p>\n\n\n\n<p>\u56e0\u4e3a\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>MAC \u53ea\u5728<strong>\u672c\u5730\u94fe\u8def\/\u672c\u5c40\u57df\u7f51<\/strong>\u4e2d\u6709\u610f\u4e49<\/li>\n\n\n\n<li>\u8def\u7531\u5668\u8de8\u7f51\u7edc\u8f6c\u53d1\u65f6\uff0c\u5fc5\u987b\u4f9d\u8d56<strong>IP \u5730\u5740<\/strong>\u786e\u5b9a\u6700\u7ec8\u76ee\u7684\u7f51\u7edc\u548c\u8def\u7531\u8def\u5f84<\/li>\n\n\n\n<li>\u6bcf\u7ecf\u8fc7\u4e00\u8df3\uff0c\u94fe\u8def\u5c42\u5e27\u4f1a\u91cd\u5c01\u88c5\uff0cMAC \u5730\u5740\u4f1a\u53d8<\/li>\n\n\n\n<li>\u4f46 IP \u6570\u636e\u62a5\u4e2d\u7684\u6e90 IP\u3001\u76ee\u7684 IP \u4e00\u822c\u4e0d\u53d8\uff08\u9664 NAT \u7b49\u60c5\u51b5\u5916\uff09<\/li>\n<\/ul>\n\n\n\n<p>\u8fd9\u6b63\u662f\u7f51\u7edc\u5c42\u548c\u6570\u636e\u94fe\u8def\u5c42\u5206\u5de5\u4e0d\u540c\u7684\u4f53\u73b0\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\u90e8\u5206\u6700\u5e38\u8003\u7684\u51e0\u4e2a\u7efc\u5408\u70b9<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">1. \u4f9d\u636e IP \u548c\u63a9\u7801\u6c42<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u7f51\u7edc\u5730\u5740<\/li>\n\n\n\n<li>\u76f4\u63a5\u5e7f\u64ad\u5730\u5740<\/li>\n\n\n\n<li>\u4e3b\u673a\u8303\u56f4<\/li>\n\n\n\n<li>\u8be5\u4e3b\u673a\u662f\u5426\u540c\u7f51\u6bb5<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">2. IP \u5206\u7247\u8ba1\u7b97<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5206\u51e0\u7247<\/li>\n\n\n\n<li>\u6bcf\u7247\u603b\u957f\u5ea6<\/li>\n\n\n\n<li>\u6bcf\u7247\u6570\u636e\u957f\u5ea6<\/li>\n\n\n\n<li>\u7247\u504f\u79fb<\/li>\n\n\n\n<li>MF\/DF \u7684\u503c<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">3. CIDR \u4e0e\u8def\u7531\u805a\u5408<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u7ed9\u82e5\u5e72\u8fde\u7eed\u5730\u5740\u5757\u6c42\u805a\u5408\u524d\u7f00<\/li>\n\n\n\n<li>\u7ed9\u76ee\u6807 IP \u627e\u6700\u957f\u524d\u7f00\u5339\u914d\u7ed3\u679c<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">4. NAT \u4e0e ARP \u7684\u533a\u522b<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>NAT\uff1a\u5730\u5740\u8f6c\u6362\uff0c\u5e38\u5728\u8fb9\u754c\u8def\u7531\u5668<\/li>\n\n\n\n<li>ARP\uff1aIP \u5230 MAC \u7684\u89e3\u6790\uff0c\u5e38\u5728\u5c40\u57df\u7f51\u5185\u90e8\u9010\u8df3\u53d1\u9001\u65f6\u4f7f\u7528<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">5. \u8def\u7531\u5668\u8f6c\u53d1\u4f9d\u636e<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u770b\u7684\u662f<strong>\u76ee\u6807 IP \u5730\u5740<\/strong><\/li>\n\n\n\n<li>\u4e0d\u662f\u770b MAC \u5730\u5740<\/li>\n\n\n\n<li>MAC \u5730\u5740\u53ea\u662f\u8be5\u8df3\u53d1\u9001\u65f6\u624d\u7528<\/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\u4e00\u5927\u5757\u6700\u5bb9\u6613\u6df7\u6dc6\u7684\u5730\u65b9<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b2c\u4e00\u7ec4\uff1aIP \u5730\u5740\u3001MAC \u5730\u5740\u3001\u5b50\u7f51\u63a9\u7801<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>IP\uff1a\u903b\u8f91\u5730\u5740\uff0c\u51b3\u5b9a\u8de8\u7f51\u7edc\u5bfb\u5740<\/li>\n\n\n\n<li>MAC\uff1a\u7269\u7406\u5730\u5740\uff0c\u51b3\u5b9a\u672c\u8df3\u94fe\u8def\u4f20\u8f93<\/li>\n\n\n\n<li>\u5b50\u7f51\u63a9\u7801\uff1a\u7528\u6765\u4ece IP \u4e2d\u5206\u79bb\u7f51\u7edc\u53f7\u548c\u4e3b\u673a\u53f7<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b2c\u4e8c\u7ec4\uff1aARP \u4e0e\u8def\u7531\u9009\u62e9<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>ARP\uff1a\u89e3\u51b3\u201c\u4e0b\u4e00\u8df3\u7684 MAC \u662f\u8c01\u201d<\/li>\n\n\n\n<li>\u8def\u7531\uff1a\u89e3\u51b3\u201c\u4e0b\u4e00\u8df3\u5e94\u8be5\u8d70\u8c01\u201d<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b2c\u4e09\u7ec4\uff1a\u5206\u7247\u4e0e\u91cd\u7ec4<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>IPv4 \u4e2d\u8def\u7531\u5668\u53ef\u5206\u7247<\/li>\n\n\n\n<li>\u76ee\u7684\u4e3b\u673a\u91cd\u7ec4<\/li>\n\n\n\n<li>\u4e2d\u95f4\u8def\u7531\u5668\u4e0d\u91cd\u7ec4<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b2c\u56db\u7ec4\uff1a\u5206\u7c7b\u7f16\u5740\u4e0e CIDR<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5206\u7c7b\u7f16\u5740\u770b A\/B\/C \u7c7b\u548c\u9ed8\u8ba4\u63a9\u7801<\/li>\n\n\n\n<li>CIDR \u4e0d\u5f3a\u8c03\u7c7b\u522b\uff0c\u5f3a\u8c03\u7f51\u7edc\u524d\u7f00\u957f\u5ea6<\/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\">\u6700\u540e\u7528\u4e00\u4e2a\u603b\u6846\u67b6\u6536\u5c3e<\/h2>\n\n\n\n<p>\u628a\u8fd9\u5757\u5185\u5bb9\u538b\u6210\u590d\u4e60\u65f6\u6700\u503c\u5f97\u8bb0\u7684\u4e00\u6761\u94fe\uff1a<\/p>\n\n\n\n<p><strong>IPv4 \u9996\u90e8\u8d1f\u8d23\u643a\u5e26\u5bfb\u5740\u3001\u5206\u7247\u3001TTL \u548c\u4e0a\u5c42\u534f\u8bae\u6807\u8bc6\u7b49\u4fe1\u606f\uff1b\u5b50\u7f51\u63a9\u7801\/CIDR \u7528\u4e8e\u5212\u5206\u7f51\u7edc\u548c\u8fdb\u884c\u8def\u7531\u805a\u5408\uff1b\u4e3b\u673a\u5148\u5224\u65ad\u662f\u5426\u540c\u7f51\u6bb5\uff0c\u4e0d\u540c\u7f51\u6bb5\u5c31\u4ea4\u7ed9\u9ed8\u8ba4\u7f51\u5173\uff1b\u8def\u7531\u5668\u6309\u6700\u957f\u524d\u7f00\u5339\u914d\u8f6c\u53d1\uff0c\u9010\u8df3\u501f\u52a9 ARP \u83b7\u53d6\u4e0b\u4e00\u8df3 MAC\uff1bTTL \u6bcf\u8fc7\u4e00\u8df3\u51cf 1\uff0c\u7528\u4e8e\u9632\u73af\uff1b\u5206\u7ec4\u8fc7\u5927\u65f6\u53ef\u80fd\u5206\u7247\uff1b\u79c1\u7f51\u8bbf\u95ee\u516c\u7f51\u65f6\u901a\u5e38\u901a\u8fc7 NAT \u5b8c\u6210\u5730\u5740\u8f6c\u6362\u3002<\/strong><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u6309\u9898\u578b\u5206\u7c7b\u6574\u7406\uff1aIPv4 \u7f16\u5740\u4e0e\u5b50\u7f51\u5212\u5206\u89e3\u9898\u6a21\u677f<\/h2>\n\n\n\n<p>\u8868\u9762\u4e0a\u770b\u5f88\u591a\uff0c\u5b9e\u9645\u4e0a\u53cd\u590d\u8003\u7684\u5c31\u662f\u51e0\u7c7b\u56fa\u5b9a\u6a21\u578b\u3002\u628a\u8fd9\u4e9b\u9898\u578b\u62c6\u5f00\u4e4b\u540e\uff0c\u4f1a\u53d1\u73b0\u505a\u9898\u6b65\u9aa4\u975e\u5e38\u7a33\u5b9a\u3002\u540e\u9762\u518d\u9047\u5230\u7c7b\u4f3c\u9898\uff0c\u57fa\u672c\u90fd\u53ef\u4ee5\u76f4\u63a5\u5957\u6a21\u677f\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e00\u3001\u4e3b\u673a\u5730\u5740\u5408\u6cd5\u6027\u5224\u65ad\u9898<\/h2>\n\n\n\n<p>\u8fd9\u7c7b\u9898\u6700\u5e38\u89c1\u7684\u95ee\u6cd5\u662f\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u54ea\u4e2a\u5730\u5740\u53ef\u4ee5\u5206\u914d\u7ed9\u4e3b\u673a<\/li>\n\n\n\n<li>\u54ea\u4e2a\u5730\u5740\u4e0d\u80fd\u4f5c\u4e3a\u76ee\u7684\u5730\u5740<\/li>\n\n\n\n<li>\u54ea\u4e2a\u5730\u5740\u662f\u975e\u6cd5\u5730\u5740<\/li>\n\n\n\n<li>\u54ea\u4e2a\u5730\u5740\u4e0d\u80fd\u5728 Internet \u4e0a\u6b63\u5e38\u8f6c\u53d1<\/li>\n<\/ul>\n\n\n\n<p>\u8fd9\u7c7b\u9898\u7684\u672c\u8d28\uff0c\u662f\u540c\u65f6\u8003\u56db\u5c42\u5224\u65ad\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u5730\u5740\u683c\u5f0f\u662f\u5426\u5408\u6cd5<\/li>\n\n\n\n<li>\u5730\u5740\u7c7b\u522b\u548c\u9ed8\u8ba4\u5b50\u7f51\u63a9\u7801<\/li>\n\n\n\n<li>\u662f\u5426\u662f\u7f51\u7edc\u5730\u5740\u6216\u5e7f\u64ad\u5730\u5740<\/li>\n\n\n\n<li>\u662f\u5426\u5c5e\u4e8e\u7279\u6b8a\u4fdd\u7559\u5730\u5740<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b2c\u4e00\u6b65\uff1a\u5148\u770b\u683c\u5f0f\u662f\u5426\u5408\u6cd5<\/h3>\n\n\n\n<p>IPV4 \u6bcf\u4e2a\u5b57\u8282\u5fc5\u987b\u5728 <code>0~255<\/code> \u4e4b\u95f4\u3002<br>\u53ea\u8981\u6709\u4e00\u4e2a\u5b57\u6bb5\u8d85\u8fc7 255\uff0c\u8fd9\u4e2a\u5730\u5740\u5c31\u76f4\u63a5\u975e\u6cd5\u3002<\/p>\n\n\n\n<p>\u4f8b\u5982\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>211.60.256.21<\/code> \u9519\uff0c\u56e0\u4e3a 256 \u8d85\u8303\u56f4<\/li>\n\n\n\n<li><code>300.1.2.3<\/code> \u9519\uff0c\u56e0\u4e3a 300 \u8d85\u8303\u56f4<\/li>\n<\/ul>\n\n\n\n<p>\u8fd9\u4e00\u5c42\u6700\u7b80\u5355\uff0c\u4f46\u8003\u8bd5\u91cc\u771f\u4f1a\u6df7\u8fdb\u53bb\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b2c\u4e8c\u6b65\uff1a\u770b\u662f\u4e0d\u662f\u7279\u6b8a\u4fdd\u7559\u5730\u5740<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">1. 127.x.x.x<\/h4>\n\n\n\n<p>\u8fd9\u662f<strong>\u56de\u9001\u5730\u5740<\/strong>\uff0c\u4e0d\u80fd\u5206\u914d\u7ed9\u7f51\u7edc\u4e2d\u7684\u666e\u901a\u4e3b\u673a\u3002<\/p>\n\n\n\n<p>\u5178\u578b\u4f8b\u5b50\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>127.10.10.17<\/code> \u4e0d\u662f\u5408\u6cd5\u516c\u7f51\u4e3b\u673a\u5730\u5740<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\">2. \u79c1\u6709\u5730\u5740<\/h4>\n\n\n\n<p>\u79c1\u6709\u5730\u5740\u5757\u6709\u4e09\u6bb5\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>10.0.0.0\/8<\/code><\/li>\n\n\n\n<li><code>172.16.0.0\/12<\/code><\/li>\n\n\n\n<li><code>192.168.0.0\/16<\/code><\/li>\n<\/ul>\n\n\n\n<p>\u8fd9\u4e9b\u5730\u5740\u53ef\u5728\u5185\u7f51\u4f7f\u7528\uff0c\u4f46\u5728\u516c\u7f51 Internet \u4e0a\u4e0d\u4f1a\u88ab\u6b63\u5e38\u8def\u7531\u8f6c\u53d1\u3002<\/p>\n\n\n\n<p>\u5178\u578b\u4f8b\u5b50\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>192.168.32.17<\/code> \u4f5c\u4e3a\u516c\u7f51\u76ee\u7684\u5730\u5740\uff0c\u8def\u7531\u5668\u4e0d\u4f1a\u6b63\u5e38\u8f6c\u53d1<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\">3. \u7f51\u7edc\u5730\u5740\u548c\u5e7f\u64ad\u5730\u5740<\/h4>\n\n\n\n<p>\u5982\u679c\u4e3b\u673a\u53f7\u5168 0\uff0c\u5c31\u662f<strong>\u7f51\u7edc\u5730\u5740<\/strong>\uff1b<br>\u5982\u679c\u4e3b\u673a\u53f7\u5168 1\uff0c\u5c31\u662f<strong>\u5e7f\u64ad\u5730\u5740<\/strong>\uff1b<br>\u8fd9\u4e24\u79cd\u90fd\u4e0d\u80fd\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\">\u7b2c\u4e09\u6b65\uff1a\u6309\u9ed8\u8ba4\u5b50\u7f51\u63a9\u7801\u5224\u65ad\u662f\u4e0d\u662f\u7f51\u7edc\u5730\u5740\/\u5e7f\u64ad\u5730\u5740<\/h3>\n\n\n\n<p>\u8fd9\u662f\u975e\u5e38\u9ad8\u9891\u7684\u70b9\u3002<br>\u9ed8\u8ba4\u5b50\u7f51\u63a9\u7801\u4e00\u5b9a\u8981\u719f\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u5730\u5740\u7c7b\u522b<\/th><th>\u7b2c\u4e00\u5b57\u8282\u8303\u56f4<\/th><th>\u9ed8\u8ba4\u63a9\u7801<\/th><\/tr><\/thead><tbody><tr><td>A \u7c7b<\/td><td>1~126<\/td><td>255.0.0.0<\/td><\/tr><tr><td>B \u7c7b<\/td><td>128~191<\/td><td>255.255.0.0<\/td><\/tr><tr><td>C \u7c7b<\/td><td>192~223<\/td><td>255.255.255.0<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h4 class=\"wp-block-heading\">\u4f8b 1<\/h4>\n\n\n\n<p><code>192.46.10.0<\/code><\/p>\n\n\n\n<p>192 \u5f00\u5934\uff0c\u662f C \u7c7b\u5730\u5740\uff0c\u9ed8\u8ba4\u63a9\u7801 <code>\/24<\/code>\u3002<br>\u6700\u540e\u4e00\u4e2a\u5b57\u8282\u5168 0\uff0c\u6240\u4ee5\u662f<strong>\u7f51\u7edc\u5730\u5740<\/strong>\uff0c\u4e0d\u80fd\u5206\u7ed9\u4e3b\u673a\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u4f8b 2<\/h4>\n\n\n\n<p><code>110.47.10.0<\/code><\/p>\n\n\n\n<p>110 \u5f00\u5934\uff0c\u662f A \u7c7b\u5730\u5740\uff0c\u9ed8\u8ba4\u63a9\u7801 <code>\/8<\/code>\u3002<br>\u4e3b\u673a\u90e8\u5206\u662f <code>47.10.0<\/code>\uff0c\u65e2\u4e0d\u662f\u5168 0\uff0c\u4e5f\u4e0d\u662f\u5168 1\uff0c\u6240\u4ee5\u53ef\u4ee5\u5206\u914d\u7ed9\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\">\u8fd9\u4e00\u7c7b\u9898\u7684\u901a\u7528\u6a21\u677f<\/h3>\n\n\n\n<p>\u4ee5\u540e\u505a\u201c\u54ea\u4e2a\u5730\u5740\u80fd\u5206\u914d\u7ed9\u4e3b\u673a\u201d\u8fd9\u7c7b\u9898\uff0c\u6309\u8fd9\u4e2a\u987a\u5e8f\u5224\u65ad\uff1a<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u6a21\u677f<\/h4>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u770b\u6bcf\u4e2a\u5b57\u8282\u662f\u5426\u90fd\u5728 <code>0~255<\/code><\/li>\n\n\n\n<li>\u770b\u662f\u5426\u5c5e\u4e8e <code>127.x.x.x<\/code><\/li>\n\n\n\n<li>\u770b\u662f\u5426\u5c5e\u4e8e\u79c1\u6709\u5730\u5740\u800c\u9898\u76ee\u53c8\u660e\u786e\u95ee\u516c\u7f51\u8f6c\u53d1<\/li>\n\n\n\n<li>\u6309\u9ed8\u8ba4\u63a9\u7801\u5224\u65ad\u662f\u4e0d\u662f\u7f51\u7edc\u5730\u5740\u6216\u5e7f\u64ad\u5730\u5740<\/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\">\u4e8c\u3001\u5b50\u7f51\u5212\u5206\u4e0e\u4e3b\u673a\u6570\u8ba1\u7b97\u9898<\/h2>\n\n\n\n<p>\u8fd9\u7c7b\u9898\u7684\u95ee\u6cd5\u901a\u5e38\u662f\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u6bcf\u4e2a\u5b50\u7f51\u6700\u591a\u591a\u5c11\u53f0\u4e3b\u673a<\/li>\n\n\n\n<li>\u6700\u591a\u80fd\u5212\u5206\u591a\u5c11\u4e2a\u5b50\u7f51<\/li>\n\n\n\n<li>\u7ed9\u5b9a\u9700\u6c42\uff0c\u54ea\u79cd\u63a9\u7801\u65b9\u6848\u53ef\u884c<\/li>\n\n\n\n<li>\u70b9\u5bf9\u70b9\u94fe\u8def\u5e94\u91c7\u7528\u4ec0\u4e48\u63a9\u7801<\/li>\n<\/ul>\n\n\n\n<p>\u8fd9\u7c7b\u9898\u7684\u5173\u952e\uff0c\u4e0d\u662f\u786c\u7b97\uff0c\u800c\u662f\u5148\u8ba4\u6e05\u4e24\u4ef6\u4e8b\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u501f\u4e86\u591a\u5c11\u4f4d\u505a\u5b50\u7f51\u53f7<\/li>\n\n\n\n<li>\u5269\u4e86\u591a\u5c11\u4f4d\u505a\u4e3b\u673a\u53f7<\/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\">1. \u5b50\u7f51\u4e2a\u6570\u600e\u4e48\u7b97<\/h3>\n\n\n\n<p>\u82e5\u4ece\u4e3b\u673a\u4f4d\u4e2d\u501f\u4e86 n \u4f4d\u505a\u5b50\u7f51\u53f7\uff0c\u5219\u5b50\u7f51\u6570\u901a\u5e38\u4e3a\uff1a<\/p>\n\n\n\n<p><code>2^n<\/code><\/p>\n\n\n\n<p>\u4f8b\u5982\uff1a<\/p>\n\n\n\n<p>\u4e00\u4e2a C \u7c7b\u7f51\u7edc\u9ed8\u8ba4\u662f <code>\/24<\/code>\u3002<br>\u5982\u679c\u6539\u6210 <code>\/27<\/code>\uff0c\u8bf4\u660e\u501f\u4e86 3 \u4f4d\u3002<\/p>\n\n\n\n<p>\u6240\u4ee5\u5b50\u7f51\u6570\u662f\uff1a<\/p>\n\n\n\n<p><code>2^3 = 8<\/code><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">2. \u6bcf\u4e2a\u5b50\u7f51\u53ef\u5206\u914d\u4e3b\u673a\u6570\u600e\u4e48\u7b97<\/h3>\n\n\n\n<p>\u82e5\u4e3b\u673a\u4f4d\u8fd8\u5269 h \u4f4d\uff0c\u5219\u6bcf\u4e2a\u5b50\u7f51\u53ef\u5206\u914d\u4e3b\u673a\u6570\u4e3a\uff1a<\/p>\n\n\n\n<p><code>2^h - 2<\/code><\/p>\n\n\n\n<p>\u4e3a\u4ec0\u4e48\u51cf 2\uff1f<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5168 0 \u4e3b\u673a\u53f7\u8868\u793a\u7f51\u7edc\u5730\u5740<\/li>\n\n\n\n<li>\u5168 1 \u4e3b\u673a\u53f7\u8868\u793a\u5e7f\u64ad\u5730\u5740<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\">\u4f8b<\/h4>\n\n\n\n<p><code>\/27<\/code> \u7684\u7f51\u7edc\uff0c\u4e3b\u673a\u4f4d\u4e3a\uff1a<\/p>\n\n\n\n<p><code>32 - 27 = 5<\/code><\/p>\n\n\n\n<p>\u6240\u4ee5\u6bcf\u4e2a\u5b50\u7f51\u53ef\u5206\u914d\u4e3b\u673a\u6570\uff1a<\/p>\n\n\n\n<p><code>2^5 - 2 = 30<\/code><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">3. \u5df2\u77e5\u5b50\u7f51\u63a9\u7801\uff0c\u5982\u4f55\u5feb\u901f\u6c42\u4e3b\u673a\u6570<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">\u4f8b<\/h4>\n\n\n\n<p>B \u7c7b\u5730\u5740\uff0c\u5b50\u7f51\u63a9\u7801 <code>255.255.240.0<\/code><\/p>\n\n\n\n<p>\u5148\u628a\u5b83\u5199\u6210\u524d\u7f00\u957f\u5ea6\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>255.255.240.0 = <code>\/20<\/code><\/li>\n<\/ul>\n\n\n\n<p>\u5219\u4e3b\u673a\u4f4d\u6570\uff1a<\/p>\n\n\n\n<p><code>32 - 20 = 12<\/code><\/p>\n\n\n\n<p>\u4e3b\u673a\u6570\uff1a<\/p>\n\n\n\n<p><code>2^12 - 2 = 4094<\/code><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">4. \u5df2\u77e5\u9700\u6c42\uff0c\u53cd\u63a8\u63a9\u7801<\/h3>\n\n\n\n<p>\u8fd9\u7c7b\u9898\u662f\u6700\u5178\u578b\u7684\u7efc\u5408\u9898\u3002<\/p>\n\n\n\n<p>\u4f8b\u5982\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u81f3\u5c11\u8981 51 \u4e2a\u5b50\u7f51<\/li>\n\n\n\n<li>\u6bcf\u4e2a\u5b50\u7f51\u81f3\u5c11\u5bb9\u7eb3 800 \u53f0\u4e3b\u673a<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\">\u5148\u770b\u4e3b\u673a\u4f4d<\/h4>\n\n\n\n<p>\u8981\u6ee1\u8db3\uff1a<\/p>\n\n\n\n<p><code>2^h - 2 &gt;= 800<\/code><\/p>\n\n\n\n<p>\u8bd5\u7b97\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>2^9 - 2 = 510<\/code>\uff0c\u4e0d\u591f<\/li>\n\n\n\n<li><code>2^10 - 2 = 1022<\/code>\uff0c\u591f<\/li>\n<\/ul>\n\n\n\n<p>\u6240\u4ee5\u81f3\u5c11\u4fdd\u7559 10 \u4f4d\u4e3b\u673a\u4f4d\u3002<br>\u56e0\u6b64\u524d\u7f00\u957f\u5ea6\u6700\u591a\u53ea\u80fd\u5230\uff1a<\/p>\n\n\n\n<p><code>32 - 10 = 22<\/code><\/p>\n\n\n\n<p>\u5373 <code>\/22<\/code><\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u518d\u770b\u5b50\u7f51\u6570<\/h4>\n\n\n\n<p>\u5982\u679c\u539f\u6765\u662f B \u7c7b\u9ed8\u8ba4 <code>\/16<\/code>\uff0c\u53d8\u6210 <code>\/22<\/code>\uff0c\u501f\u4e86 6 \u4f4d\uff1a<\/p>\n\n\n\n<p><code>2^6 = 64<\/code><\/p>\n\n\n\n<p>64 \u4e2a\u5b50\u7f51\uff0c\u4e5f\u591f\u3002<\/p>\n\n\n\n<p>\u6240\u4ee5\u8be5\u9898\u9009 <code>\/22<\/code>\uff0c\u5373 <code>255.255.252.0<\/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\">5. \u70b9\u5bf9\u70b9\u94fe\u8def\u4e3a\u4ec0\u4e48\u901a\u5e38\u9009 \/30<\/h3>\n\n\n\n<p>\u70b9\u5bf9\u70b9\u94fe\u8def\u53ea\u9700\u8981\u4e24\u4e2a\u4e3b\u673a\u5730\u5740\u3002<br>\u5728\u4f20\u7edf\u8003\u7814\u9898\u91cc\uff0c\u6700\u7701\u5730\u5740\u53c8\u521a\u597d\u591f\u7528\u7684\u63a9\u7801\u662f\uff1a<\/p>\n\n\n\n<p><code>255.255.255.252<\/code><\/p>\n\n\n\n<p>\u4e5f\u5c31\u662f <code>\/30<\/code><\/p>\n\n\n\n<p>\u56e0\u4e3a\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u603b\u5730\u5740\u6570 4 \u4e2a<\/li>\n\n\n\n<li>\u53ef\u7528\u4e3b\u673a\u6570 2 \u4e2a<\/li>\n<\/ul>\n\n\n\n<p>\u521a\u597d\u7ed9\u94fe\u8def\u4e24\u7aef\u5404\u4e00\u4e2a\u3002<\/p>\n\n\n\n<p>\u6ce8\u610f\uff1a\u5de5\u7a0b\u91cc\u6709\u65f6\u4f1a\u63d0\u5230 <code>\/31<\/code>\uff0c\u4f46\u5728\u8003\u7814\u4f20\u7edf\u9898\u91cc\uff0c\u6807\u51c6\u7b54\u6848\u4e00\u822c\u4ecd\u662f <code>\/30<\/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\">\u8fd9\u4e00\u7c7b\u9898\u7684\u901a\u7528\u6a21\u677f<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">\u5df2\u77e5\u524d\u7f00\uff0c\u6c42\u4e3b\u673a\u6570<\/h4>\n\n\n\n<ol class=\"wp-block-list\">\n<li><code>\u4e3b\u673a\u4f4d = 32 - \u524d\u7f00\u957f\u5ea6<\/code><\/li>\n\n\n\n<li><code>\u4e3b\u673a\u6570 = 2^(\u4e3b\u673a\u4f4d) - 2<\/code><\/li>\n<\/ol>\n\n\n\n<h4 class=\"wp-block-heading\">\u5df2\u77e5\u9ed8\u8ba4\u7f51\u7edc\uff0c\u6c42\u5b50\u7f51\u6570<\/h4>\n\n\n\n<ol class=\"wp-block-list\">\n<li><code>\u501f\u4f4d\u6570 = \u65b0\u524d\u7f00 - \u9ed8\u8ba4\u524d\u7f00<\/code><\/li>\n\n\n\n<li><code>\u5b50\u7f51\u6570 = 2^(\u501f\u4f4d\u6570)<\/code><\/li>\n<\/ol>\n\n\n\n<h4 class=\"wp-block-heading\">\u5df2\u77e5\u9700\u6c42\uff0c\u53cd\u63a8\u63a9\u7801<\/h4>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u5148\u6839\u636e\u4e3b\u673a\u6570\u6c42\u6700\u5c11\u4e3b\u673a\u4f4d<\/li>\n\n\n\n<li>\u518d\u770b\u5bf9\u5e94\u524d\u7f00\u80fd\u5426\u6ee1\u8db3\u5b50\u7f51\u6570\u8981\u6c42<\/li>\n\n\n\n<li>\u4e8c\u8005\u90fd\u6ee1\u8db3\u624d\u53ef\u884c<\/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\">\u4e09\u3001CIDR \u8303\u56f4\u4e0e\u540c\u5b50\u7f51\u5224\u65ad\u9898<\/h2>\n\n\n\n<p>\u8fd9\u7c7b\u9898\u6700\u5e38\u89c1\u7684\u5f62\u5f0f\u662f\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u67d0\u4e2a <code>\/n<\/code> \u5730\u5740\u5757\u5305\u542b\u54ea\u4e9b\u5730\u5740<\/li>\n\n\n\n<li>\u67d0\u4e2a\u5730\u5740\u548c\u54ea\u4e2a\u5730\u5740\u540c\u5c5e\u4e00\u4e2a\u5b50\u7f51<\/li>\n\n\n\n<li>\u67d0\u4e2a\u5730\u5740\u5757\u7684\u7f51\u7edc\u5730\u5740\u3001\u5e7f\u64ad\u5730\u5740\u3001\u4e3b\u673a\u8303\u56f4\u662f\u4ec0\u4e48<\/li>\n\n\n\n<li>\u9ed8\u8ba4\u7f51\u5173\u4e3a\u4ec0\u4e48\u4e0d\u80fd\u7528\u67d0\u4e2a\u5730\u5740<\/li>\n<\/ul>\n\n\n\n<p>\u8fd9\u90e8\u5206\u6700\u5b9e\u7528\u7684\u65b9\u6cd5\u5c31\u662f\uff1a<strong>\u5757\u5927\u5c0f\u6cd5<\/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\">1. \u5757\u5927\u5c0f\u6cd5\u7684\u6838\u5fc3<\/h3>\n\n\n\n<p>\u67d0\u4e2a\u5b57\u8282\u7684\u5757\u5927\u5c0f = <code>256 - \u8be5\u5b57\u8282\u63a9\u7801\u503c<\/code><\/p>\n\n\n\n<p>\u4f8b\u5982\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u63a9\u7801\u5b57\u8282 248 \u2192 \u5757\u5927\u5c0f 8<\/li>\n\n\n\n<li>\u63a9\u7801\u5b57\u8282 240 \u2192 \u5757\u5927\u5c0f 16<\/li>\n\n\n\n<li>\u63a9\u7801\u5b57\u8282 224 \u2192 \u5757\u5927\u5c0f 32<\/li>\n\n\n\n<li>\u63a9\u7801\u5b57\u8282 192 \u2192 \u5757\u5927\u5c0f 64<\/li>\n<\/ul>\n\n\n\n<p>\u7136\u540e\u770b\u76ee\u6807\u5730\u5740\u843d\u5728\u54ea\u4e2a\u5757\u91cc\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. \u5982\u4f55\u6c42 CIDR \u5730\u5740\u5757\u8303\u56f4<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">\u4f8b<\/h4>\n\n\n\n<p><code>192.168.10.0\/20<\/code><\/p>\n\n\n\n<p><code>\/20<\/code> \u7684\u63a9\u7801\u662f\uff1a<\/p>\n\n\n\n<p><code>255.255.240.0<\/code><\/p>\n\n\n\n<p>\u7b2c\u4e09\u4e2a\u5b57\u8282\u63a9\u7801\u662f 240\uff0c\u6240\u4ee5\u5757\u5927\u5c0f\uff1a<\/p>\n\n\n\n<p><code>256 - 240 = 16<\/code><\/p>\n\n\n\n<p>\u7b2c\u4e09\u4e2a\u5b57\u8282\u7684\u5206\u5757\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>\u2026<\/li>\n<\/ul>\n\n\n\n<p>10 \u843d\u5728 <code>0~15<\/code> \u8fd9\u4e00\u5757\uff0c\u6240\u4ee5\u8be5\u5730\u5740\u5757\u5b9e\u9645\u8303\u56f4\u662f\uff1a<\/p>\n\n\n\n<p><code>192.168.0.0 ~ 192.168.15.255<\/code><\/p>\n\n\n\n<p>\u8fd9\u5c31\u662f\u4e3a\u4ec0\u4e48 <code>192.168.10.0\/20<\/code> \u7684\u771f\u6b63\u7f51\u7edc\u5730\u5740\u4e0d\u662f <code>192.168.10.0<\/code>\uff0c\u800c\u662f <code>192.168.0.0<\/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. \u5982\u4f55\u5224\u65ad\u4e24\u4e2a\u5730\u5740\u662f\u5426\u540c\u5b50\u7f51<\/h3>\n\n\n\n<p>\u6700\u672c\u8d28\u7684\u65b9\u6cd5\u662f\uff1a<\/p>\n\n\n\n<p><code>IP\u5730\u5740 AND \u5b50\u7f51\u63a9\u7801<\/code><\/p>\n\n\n\n<p>\u82e5\u7ed3\u679c\u76f8\u540c\uff0c\u5219\u5c5e\u4e8e\u540c\u4e00\u5b50\u7f51\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u4f8b<\/h4>\n\n\n\n<p><code>192.16.0.19\/28<\/code><\/p>\n\n\n\n<p><code>\/28<\/code> \u63a9\u7801\u662f <code>255.255.255.240<\/code>\uff0c\u5757\u5927\u5c0f 16\u3002<br>\u6700\u540e\u4e00\u4e2a\u5b57\u8282 19 \u843d\u5728 <code>16~31<\/code>\uff0c\u6240\u4ee5\u5b50\u7f51\u662f\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u7f51\u7edc\u5730\u5740\uff1a192.16.0.16<\/li>\n\n\n\n<li>\u5e7f\u64ad\u5730\u5740\uff1a192.16.0.31<\/li>\n\n\n\n<li>\u53ef\u7528\u4e3b\u673a\uff1a192.16.0.17 ~ 192.16.0.30<\/li>\n<\/ul>\n\n\n\n<p>\u56e0\u6b64\u4e0e\u5b83\u540c\u5b50\u7f51\u7684\u4e3b\u673a\u5730\u5740\u53ef\u4ee5\u662f\uff1a<\/p>\n\n\n\n<p><code>192.16.0.17<\/code><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">4. \u9ed8\u8ba4\u7f51\u5173\u5730\u5740\u4e3a\u4ec0\u4e48\u4f1a\u51fa\u9519<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">\u4f8b<\/h4>\n\n\n\n<p>\u4e3b\u673a\u5730\u5740\uff1a<code>200.15.10.6\/29<\/code><br>\u9ed8\u8ba4\u7f51\u5173\uff1a<code>200.15.10.7<\/code><\/p>\n\n\n\n<p><code>\/29<\/code> \u7684\u5757\u5927\u5c0f\u662f 8\uff0c\u6240\u4ee5\u8fd9\u4e00\u5b50\u7f51\u8303\u56f4\u662f\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u7f51\u7edc\u5730\u5740\uff1a200.15.10.0<\/li>\n\n\n\n<li>\u53ef\u7528\u4e3b\u673a\uff1a200.15.10.1 ~ 200.15.10.6<\/li>\n\n\n\n<li>\u5e7f\u64ad\u5730\u5740\uff1a200.15.10.7<\/li>\n<\/ul>\n\n\n\n<p>\u56e0\u6b64 <code>.7<\/code> \u4e0d\u662f\u5408\u6cd5\u4e3b\u673a\u5730\u5740\uff0c\u800c\u662f<strong>\u5e7f\u64ad\u5730\u5740<\/strong>\u3002<br>\u5e7f\u64ad\u5730\u5740\u4e0d\u80fd\u914d\u7f6e\u4e3a\u9ed8\u8ba4\u7f51\u5173\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">5. \u76f4\u63a5\u5e7f\u64ad\u5730\u5740\u600e\u4e48\u6c42<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">\u4f8b<\/h4>\n\n\n\n<p>\u4e3b\u673a\u5730\u5740\uff1a<code>166.66.66.66<\/code><br>\u5b50\u7f51\u63a9\u7801\uff1a<code>255.255.192.0<\/code><\/p>\n\n\n\n<p>\u7b2c\u4e09\u4e2a\u5b57\u8282\u63a9\u7801\u662f 192\uff0c\u5757\u5927\u5c0f\u4e3a 64\u3002<br>66 \u843d\u5728 <code>64~127<\/code> \u8fd9\u4e2a\u5757\u4e2d\u3002<\/p>\n\n\n\n<p>\u6240\u4ee5\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u7f51\u7edc\u5730\u5740\uff1a166.66.64.0<\/li>\n\n\n\n<li>\u5e7f\u64ad\u5730\u5740\uff1a166.66.127.255<\/li>\n<\/ul>\n\n\n\n<p>\u4ee5\u540e\u53ea\u8981\u95ee\u201c\u5411\u6240\u5728\u5b50\u7f51\u5e7f\u64ad\u201d\uff0c\u76ee\u6807\u5730\u5740\u5c31\u662f\u8fd9\u4e2a\u5e7f\u64ad\u5730\u5740\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\u8fd9\u4e00\u7c7b\u9898\u7684\u901a\u7528\u6a21\u677f<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">\u6c42\u7f51\u7edc\u5730\u5740<\/h4>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u6c42\u63a9\u7801<\/li>\n\n\n\n<li>\u627e\u5757\u5927\u5c0f<\/li>\n\n\n\n<li>\u5224\u65ad\u843d\u5728\u54ea\u4e2a\u5757<\/li>\n\n\n\n<li>\u5757\u8d77\u70b9\u5c31\u662f\u7f51\u7edc\u5730\u5740<\/li>\n<\/ol>\n\n\n\n<h4 class=\"wp-block-heading\">\u6c42\u5e7f\u64ad\u5730\u5740<\/h4>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u5148\u6c42\u7f51\u7edc\u5730\u5740<\/li>\n\n\n\n<li>\u628a\u4e3b\u673a\u4f4d\u5168\u7f6e 1<\/li>\n<\/ol>\n\n\n\n<h4 class=\"wp-block-heading\">\u6c42\u540c\u5b50\u7f51\u4e3b\u673a<\/h4>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u5148\u6c42\u7f51\u7edc\u5730\u5740\u548c\u5e7f\u64ad\u5730\u5740<\/li>\n\n\n\n<li>\u5728\u4e24\u8005\u4e4b\u95f4\u7684\u4e3b\u673a\u5730\u5740\u624d\u53ef\u9009<\/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\">\u56db\u3001\u8def\u7531\u805a\u5408\u3001\u91cd\u53e0\u4e0e\u4e0d\u91cd\u53e0\u5224\u65ad\u9898<\/h2>\n\n\n\n<p>\u8fd9\u7c7b\u9898\u7ecf\u5e38\u8ba9\u4eba\u611f\u89c9\u6700\u4e71\uff0c\u56e0\u4e3a\u5b83\u540c\u65f6\u8003\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>CIDR<\/li>\n\n\n\n<li>\u5730\u5740\u5757\u8fb9\u754c<\/li>\n\n\n\n<li>\u662f\u5426\u91cd\u53e0<\/li>\n\n\n\n<li>\u662f\u5426\u80fd\u805a\u5408<\/li>\n\n\n\n<li>\u662f\u5426\u4f1a\u5f15\u5165\u591a\u4f59\u5730\u5740<\/li>\n<\/ul>\n\n\n\n<p>\u4f46\u5b9e\u9645\u4e0a\u5224\u65ad\u6807\u51c6\u5f88\u56fa\u5b9a\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">1. \u5224\u65ad\u4e24\u4e2a\u5730\u5740\u5757\u662f\u5426\u91cd\u53e0<\/h3>\n\n\n\n<p>\u5148\u6c42\u51fa\u5404\u81ea\u8986\u76d6\u8303\u56f4\u3002<br>\u53ea\u8981\u8303\u56f4\u6709\u4ea4\u96c6\uff0c\u5c31\u91cd\u53e0\uff1b\u6ca1\u6709\u4ea4\u96c6\u5c31\u4e0d\u91cd\u53e0\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u4f8b<\/h4>\n\n\n\n<p>\u5df2\u5206\u914d\u5b50\u7f51\uff1a<code>74.178.247.96\/29<\/code><\/p>\n\n\n\n<p><code>\/29<\/code> \u5757\u5927\u5c0f 8\uff0c\u6240\u4ee5\u8986\u76d6\u8303\u56f4\u662f\uff1a<\/p>\n\n\n\n<p><code>74.178.247.96 ~ 74.178.247.103<\/code><\/p>\n\n\n\n<p>\u82e5\u67d0\u5019\u9009\u524d\u7f00\u662f\uff1a<\/p>\n\n\n\n<p><code>74.178.247.96\/28<\/code><\/p>\n\n\n\n<p>\u5219 <code>\/28<\/code> \u5757\u5927\u5c0f 16\uff0c\u8986\u76d6\u8303\u56f4\u662f\uff1a<\/p>\n\n\n\n<p><code>74.178.247.96 ~ 74.178.247.111<\/code><\/p>\n\n\n\n<p>\u660e\u663e\u4e0e\u539f\u5b50\u7f51\u91cd\u53e0\uff0c\u56e0\u6b64\u4e0d\u80fd\u518d\u5206\u914d\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. \u8def\u7531\u805a\u5408\u65f6\uff0c\u4ec0\u4e48\u53eb\u201c\u80fd\u8986\u76d6\u201d<\/h3>\n\n\n\n<p>\u6709\u65f6\u9898\u76ee\u53ea\u8981\u6c42\u201c\u80fd\u8986\u76d6\u82e5\u5e72\u6761\u8def\u7531\u201d\uff0c\u5e76\u4e0d\u8981\u6c42\u201c\u6070\u597d\u53ea\u8986\u76d6\u8fd9\u4e9b\u8def\u7531\u201d\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u4f8b<\/h4>\n\n\n\n<p>\u6709\u56db\u6761\u8def\u7531\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>172.18.129.0\/24<\/li>\n\n\n\n<li>172.18.130.0\/24<\/li>\n\n\n\n<li>172.18.132.0\/24<\/li>\n\n\n\n<li>172.18.133.0\/24<\/li>\n<\/ul>\n\n\n\n<p>\u82e5\u8981\u627e\u4e00\u4e2a\u805a\u5408\u8def\u7531\u628a\u5b83\u4eec\u90fd\u8986\u76d6\u4f4f\uff0c\u53ef\u4ee5\u9009\uff1a<\/p>\n\n\n\n<p><code>172.18.128.0\/21<\/code><\/p>\n\n\n\n<p>\u56e0\u4e3a <code>\/21<\/code> \u8986\u76d6\u7b2c\u4e09\u4e2a\u5b57\u8282 <code>128~135<\/code>\uff0c\u628a\u8fd9\u56db\u6761\u90fd\u5305\u542b\u8fdb\u53bb\u4e86\u3002<\/p>\n\n\n\n<p>\u867d\u7136\u5b83\u8fd8\u987a\u5e26\u8986\u76d6\u4e86\u522b\u7684\u5730\u5740\uff0c\u4f46\u9898\u76ee\u53ea\u95ee\u201c\u80fd\u8986\u76d6\u201d\uff0c\u6240\u4ee5\u5b83\u6210\u7acb\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. \u4ec0\u4e48\u65f6\u5019\u201c\u805a\u5408\u540e\u4e0d\u4f1a\u5f15\u5165\u591a\u4f59\u5730\u5740\u201d<\/h3>\n\n\n\n<p>\u8fd9\u662f\u66f4\u4e25\u683c\u7684\u4e00\u7c7b\u9898\u3002<\/p>\n\n\n\n<p>\u8981\u6ee1\u8db3\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u4e24\u4e2a\u5730\u5740\u5757\u5927\u5c0f\u76f8\u540c<\/li>\n\n\n\n<li>\u4e24\u4e2a\u5730\u5740\u5757\u76f8\u90bb<\/li>\n\n\n\n<li>\u805a\u5408\u540e\u7684\u66f4\u5927\u5757\u6b63\u597d\u8fb9\u754c\u5bf9\u9f50<\/li>\n<\/ol>\n\n\n\n<h4 class=\"wp-block-heading\">\u4f8b<\/h4>\n\n\n\n<p><code>192.168.6.192\/26<\/code><\/p>\n\n\n\n<p>\u5b83\u8986\u76d6\uff1a<\/p>\n\n\n\n<p><code>192.168.6.192 ~ 192.168.6.255<\/code><\/p>\n\n\n\n<p>\u82e5\u8981\u4e0e\u5b83\u7cbe\u786e\u805a\u5408\uff0c\u4e0d\u5f15\u5165\u591a\u4f59\u5730\u5740\uff0c\u53e6\u4e00\u4e2a\u5757\u5fc5\u987b\u662f\uff1a<\/p>\n\n\n\n<p><code>192.168.6.128\/26<\/code><\/p>\n\n\n\n<p>\u4e24\u8005\u6b63\u597d\u5408\u6210\uff1a<\/p>\n\n\n\n<p><code>192.168.6.128\/25<\/code><\/p>\n\n\n\n<p>\u5982\u679c\u4e0d\u662f\u76f8\u90bb\u540c\u89c4\u6a21\u5757\uff0c\u5c31\u4e0d\u80fd\u7cbe\u786e\u805a\u5408\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">4. \u201c\u4e00\u4e2a\u7f51\u7edc\u5212\u5206\u4e3a 4 \u4e2a\u5b50\u7f51\u201d\u8fd9\u7c7b\u9898\u600e\u4e48\u60f3<\/h3>\n\n\n\n<p>\u8fd9\u7c7b\u9898\u4e0d\u80fd\u53ea\u770b\u67d0\u4e2a\u9009\u9879\u548c\u5df2\u77e5\u5b50\u7f51\u662f\u5426\u91cd\u53e0\uff0c\u8fd8\u8981\u770b\uff1a<\/p>\n\n\n\n<p><strong>\u52a0\u5165\u8fd9\u4e2a\u5019\u9009\u5b50\u7f51\u540e\uff0c\u5269\u4f59\u5730\u5740\u7a7a\u95f4\u662f\u5426\u8fd8\u80fd\u5728\u89c4\u5b9a\u4e2a\u6570\u5185\u88ab\u5206\u5b8c\u3002<\/strong><\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u4f8b<\/h4>\n\n\n\n<p>\u5df2\u77e5\u5176\u4e2d\u4e00\u4e2a\u5b50\u7f51\u662f\uff1a<\/p>\n\n\n\n<p><code>192.168.1.130\/26<\/code><\/p>\n\n\n\n<p>\u5b83\u5b9e\u9645\u5bf9\u5e94\u5b50\u7f51\uff1a<\/p>\n\n\n\n<p><code>192.168.1.128\/26<\/code><\/p>\n\n\n\n<p>\u5982\u679c\u53e6\u4e00\u4e2a\u5019\u9009\u662f\uff1a<\/p>\n\n\n\n<p><code>192.168.1.96\/27<\/code><\/p>\n\n\n\n<p>\u90a3\u4e48\u5269\u4f59\u7a7a\u95f4\u4f1a\u88ab\u5207\u5f97\u592a\u788e\uff0c\u65e0\u6cd5\u5728\u603b\u5171\u53ea\u5212\u5206\u6210 4 \u4e2a\u5b50\u7f51\u7684\u6761\u4ef6\u4e0b\u521a\u597d\u5206\u5b8c\u3002<br>\u6240\u4ee5\u8fd9\u79cd\u9898\u4e0d\u80fd\u53ea\u770b\u201c\u4e0d\u91cd\u53e0\u201d\uff0c\u8fd8\u8981\u770b\u201c\u603b\u6570\u662f\u5426\u8fd8\u80fd\u51d1\u591f\u4e14\u521a\u597d\u5206\u5b8c\u201d\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\u8fd9\u4e00\u7c7b\u9898\u7684\u901a\u7528\u6a21\u677f<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">\u5224\u65ad\u662f\u5426\u91cd\u53e0<\/h4>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u5206\u522b\u6c42\u51fa\u6bcf\u4e2a\u5730\u5740\u5757\u8986\u76d6\u8303\u56f4<\/li>\n\n\n\n<li>\u770b\u8303\u56f4\u662f\u5426\u6709\u4ea4\u96c6<\/li>\n<\/ol>\n\n\n\n<h4 class=\"wp-block-heading\">\u5224\u65ad\u80fd\u5426\u7cbe\u786e\u805a\u5408<\/h4>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u5730\u5740\u5757\u5927\u5c0f\u5fc5\u987b\u76f8\u540c<\/li>\n\n\n\n<li>\u5730\u5740\u8303\u56f4\u5fc5\u987b\u76f8\u90bb<\/li>\n\n\n\n<li>\u805a\u5408\u540e\u65b0\u5757\u5fc5\u987b\u5bf9\u9f50<\/li>\n<\/ol>\n\n\n\n<h4 class=\"wp-block-heading\">\u5224\u65ad\u80fd\u5426\u4f5c\u4e3a\u5269\u4f59\u5b50\u7f51\u4e4b\u4e00<\/h4>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u5148\u786e\u8ba4\u4e0e\u5df2\u6709\u5b50\u7f51\u4e0d\u91cd\u53e0<\/li>\n\n\n\n<li>\u518d\u770b\u5269\u4f59\u5730\u5740\u7a7a\u95f4\u662f\u5426\u8fd8\u80fd\u5728\u89c4\u5b9a\u6570\u91cf\u5185\u6b63\u597d\u5212\u5b8c<\/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\">\u6700\u540e\u628a\u8fd9\u56db\u7c7b\u9898\u538b\u6210\u4e00\u5957\u505a\u9898\u987a\u5e8f<\/h2>\n\n\n\n<p>\u4ee5\u540e\u78b0\u5230 IPv4 \u5730\u5740\u9898\uff0c\u57fa\u672c\u53ef\u4ee5\u6309\u8fd9\u4e2a\u987a\u5e8f\u60f3\uff1a<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b2c\u4e00\u95ee\uff1a\u8fd9\u662f\u5408\u6cd5\u7684\u5417\uff1f<\/h3>\n\n\n\n<p>\u5148\u770b\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u6bcf\u6bb5\u662f\u5426\u5728 <code>0~255<\/code><\/li>\n\n\n\n<li>\u662f\u5426\u662f 127 \u56de\u9001\u5730\u5740<\/li>\n\n\n\n<li>\u662f\u5426\u662f\u79c1\u6709\u5730\u5740<\/li>\n\n\n\n<li>\u662f\u5426\u662f\u7f51\u7edc\u5730\u5740\u6216\u5e7f\u64ad\u5730\u5740<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b2c\u4e8c\u95ee\uff1a\u8fd9\u4e2a\u63a9\u7801\u610f\u5473\u7740\u4ec0\u4e48\uff1f<\/h3>\n\n\n\n<p>\u5148\u770b\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u524d\u7f00\u957f\u5ea6\u662f\u591a\u5c11<\/li>\n\n\n\n<li>\u501f\u4e86\u591a\u5c11\u4f4d<\/li>\n\n\n\n<li>\u8fd8\u5269\u591a\u5c11\u4e3b\u673a\u4f4d<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b2c\u4e09\u95ee\uff1a\u8fd9\u4e2a\u5730\u5740\u843d\u5728\u54ea\u4e2a\u5757\uff1f<\/h3>\n\n\n\n<p>\u5148\u6c42\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5757\u5927\u5c0f = <code>256 - \u63a9\u7801\u5b57\u8282<\/code><\/li>\n\n\n\n<li>\u5730\u5740\u5c5e\u4e8e\u54ea\u4e2a\u5757<\/li>\n\n\n\n<li>\u7f51\u7edc\u5730\u5740\u548c\u5e7f\u64ad\u5730\u5740\u5206\u522b\u662f\u4ec0\u4e48<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b2c\u56db\u95ee\uff1a\u662f\u5426\u91cd\u53e0\u3001\u80fd\u5426\u805a\u5408\uff1f<\/h3>\n\n\n\n<p>\u5148\u5224\u65ad\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u8303\u56f4\u662f\u5426\u6709\u4ea4\u96c6<\/li>\n\n\n\n<li>\u662f\u5426\u540c\u89c4\u6a21\u3001\u76f8\u90bb\u3001\u5bf9\u9f50<\/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\u4e00\u5757\u6700\u503c\u5f97\u80cc\u7684\u51e0\u4e2a\u201c\u79d2\u6740\u7ed3\u8bba\u201d<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">1. \u79c1\u6709\u5730\u5740<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>10.0.0.0\/8<\/code><\/li>\n\n\n\n<li><code>172.16.0.0\/12<\/code><\/li>\n\n\n\n<li><code>192.168.0.0\/16<\/code><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">2. \u70b9\u5bf9\u70b9\u94fe\u8def\u4f20\u7edf\u6807\u51c6\u7b54\u6848<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>\/30<\/code><\/li>\n\n\n\n<li><code>255.255.255.252<\/code><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">3. \u4e3b\u673a\u6570\u516c\u5f0f<\/h3>\n\n\n\n<p><code>2^(\u4e3b\u673a\u4f4d\u6570) - 2<\/code><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">4. \u5b50\u7f51\u6570\u516c\u5f0f<\/h3>\n\n\n\n<p><code>2^(\u501f\u7528\u7684\u5b50\u7f51\u4f4d\u6570)<\/code><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">5. \u7247\u504f\u79fb\u5355\u4f4d<\/h3>\n\n\n\n<p>\u867d\u7136\u8fd9\u7ec4\u4e0d\u662f\u5206\u7247\u9898\uff0c\u4f46\u4e5f\u987a\u624b\u518d\u538b\u4e00\u4e0b\uff1a<br><strong>\u7247\u504f\u79fb\u7684\u5355\u4f4d\u662f 8B\uff0c\u4e0d\u662f 1B\u3002<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u8fd9\u4e00\u5757\u7684\u4e3b\u7ebf\u5148\u7406\u987a \u8fd9\u4e00\u5927\u5757\u5176\u5b9e\u5c31\u662f\u7f51\u7edc\u5c42\u6700\u6838\u5fc3\u7684\u4e00\u6761\u4e3b\u7ebf\uff1a\u4e3b\u673a\u5148\u7528 IP \u5730\u5740\u6807\u8bc6\u201c\u8981\u53bb\u54ea\u91cc\u201d\uff0c\u518d\u7ed3\u5408\u5b50\u7f51\u63a9 [&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-1937","post","type-post","status-publish","format-standard","hentry","category-text"],"_links":{"self":[{"href":"http:\/\/www.preluna.xyz\/index.php\/wp-json\/wp\/v2\/posts\/1937","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=1937"}],"version-history":[{"count":2,"href":"http:\/\/www.preluna.xyz\/index.php\/wp-json\/wp\/v2\/posts\/1937\/revisions"}],"predecessor-version":[{"id":1946,"href":"http:\/\/www.preluna.xyz\/index.php\/wp-json\/wp\/v2\/posts\/1937\/revisions\/1946"}],"wp:attachment":[{"href":"http:\/\/www.preluna.xyz\/index.php\/wp-json\/wp\/v2\/media?parent=1937"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.preluna.xyz\/index.php\/wp-json\/wp\/v2\/categories?post=1937"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.preluna.xyz\/index.php\/wp-json\/wp\/v2\/tags?post=1937"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}