{"id":655,"date":"2020-06-16T12:00:24","date_gmt":"2020-06-16T04:00:24","guid":{"rendered":"https:\/\/freeapp.sbs\/blog\/?p=655"},"modified":"2025-04-01T16:36:01","modified_gmt":"2025-04-01T07:36:01","slug":"mdbhu39qve2pg64","status":"publish","type":"post","link":"https:\/\/eternalsphere.net\/echoes\/index.php\/2020\/06\/16\/mdbhu39qve2pg64\/","title":{"rendered":"\u4e00\u4e2aHTTP\u8bf7\u6c42\u7684\u66f2\u6298\u7ecf\u5386"},"content":{"rendered":"<p>\u539f\u6587: <a href=\"https:\/\/www.neroht.com\/article-detail\/18\">https:\/\/www.neroht.com\/article-detail\/18<\/a><\/p>\n<div class=\"top\">\n<h1>\u4e00\u4e2aHTTP\u8bf7\u6c42\u7684\u66f2\u6298\u7ecf\u5386<\/h1>\n<div class=\"author\">\n<p>nero\u53d1\u5e03\u4e8e 2020-04-30 09:04:73<\/p>\n<\/div>\n<\/div>\n<div class=\"md-content\">\n<h1 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id=\"http\">HTTP<\/h2>\n<p>HTTP\u5c5e\u4e8e\u5e94\u7528\u5c42\uff0c\u7528\u6237\u89e6\u53d1\u4ea4\u4e92\u6240\u4ea7\u751f\u7684\u884c\u4e3a\u6570\u636e\u548c\u670d\u52a1\u7aef\u5bf9\u6b64\u7684\u54cd\u5e94\u90fd\u7531\u5b83\u5c01\u88c5\u6210HTTP\u62a5\u6587\uff0c\u518d\u4ea4\u7531\u4e0b\u5c42\u534f\u8bae\u8fdb\u884c\u5904\u7406\u3002\u62a5\u6587\u7684\u4f5c\u7528\u662f\u5ba2\u6237\u7aef\u4e0e\u670d\u52a1\u7aef\u6c9f\u901a\u7684\u8f7d\u4f53\uff0c\u53cc\u65b9\u90fd\u8981\u9075\u5faa\u7edf\u4e00\u89c4\u5219\u5bf9\u4fe1\u606f\u8fdb\u884c\u5904\u7406\uff0c\u8fd9\u4e00\u89c4\u5219\u79f0\u4e3aHTTP\u3002<\/p>\n<p>\u5ba2\u6237\u7aef\u4e0e\u670d\u52a1\u7aef\u7684\u4ea4\u4e92\u5f80\u5f80\u975e\u5e38\u590d\u6742\uff0c\u4e3a\u4e86\u4f7f\u53cc\u65b9\u90fd\u80fd\u9ad8\u6548\u3001\u660e\u786e\u3001\u5b89\u5168\u5730\u901a\u4fe1\uff08\u4f8b\u5982\u4f20\u9012\u610f\u56fe\u4e0e\u72b6\u6001\u3001\u627f\u8f7d\u6570\u636e\u3001\u643a\u5e26\u8ba4\u8bc1\u4fe1\u606f\u3001\u63a7\u5236\u8fde\u63a5\u884c\u4e3a\u4e0e\u7f13\u5b58\uff09\uff0c\u9700\u8981\u4f9d\u8d56\u62a5\u6587\u4e2d\u7684\u7ed3\u6784\u6765\u5b9e\u73b0\uff0c\u4e0b\u9762\u5148\u4ece\u7ed3\u6784\u5f00\u59cb\u770b\u3002<\/p>\n<h3 id=\"-7\">\u62a5\u6587\u7ed3\u6784<\/h3>\n<p>HTTP\u62a5\u6587\u7684\u7ed3\u6784\u5206\u4e3a\u8bf7\u6c42\u548c\u54cd\u5e94\u4e24\u79cd\uff0c\u8bf7\u6c42\u62a5\u6587\u5c01\u88c5\u7528\u6237\u64cd\u4f5c\u4ea7\u751f\u7684\u52a8\u4f5c\uff0c\u544a\u77e5\u670d\u52a1\u5668\u5e94\u91c7\u53d6\u4ec0\u4e48\u884c\u4e3a\uff0c\u54cd\u5e94\u62a5\u6587\u6765\u544a\u77e5\u5ba2\u6237\u7aef\u8bf7\u6c42\u7684\u7ed3\u679c\u3002<\/p>\n<p>\u8bf7\u6c42\u62a5\u6587\u683c\u5f0f\uff1a<\/p>\n<pre><code>&lt;method&gt; &lt;request-url&gt; &lt;version&gt; \/\/ \u8d77\u59cb\u884c\u683c\u5f0f\r\n&lt;headers&gt; \/\/ \u9996\u90e8\r\n&lt;body&gt; \/\/ \u5b9e\u4f53\r\n<\/code><\/pre>\n<p>\u54cd\u5e94\u62a5\u6587\u683c\u5f0f\uff1a<\/p>\n<pre><code>&lt;method&gt; &lt;status&gt; &lt;reason-phrase&gt; \/\/ \u8d77\u59cb\u884c\u683c\u5f0f\r\n&lt;headers&gt; \/\/ \u9996\u90e8\r\n&lt;body&gt; \/\/ \u5b9e\u4f53\r\n<\/code><\/pre>\n<h3 id=\"-8\">\u8d77\u59cb\u884c<\/h3>\n<p>\u62a5\u6587\u7684\u8d77\u59cb\u884c\u8868\u660e\u4e86\u62a5\u6587\u7684\u5f00\u59cb\uff0c\u8bf7\u6c42\u548c\u54cd\u5e94\u5404\u81ea\u7684\u8d77\u59cb\u884c\u7684\u683c\u5f0f\u4e5f\u4e0d\u76f8\u540c\u3002<\/p>\n<p>\u8bf7\u6c42\u62a5\u6587\u7684\u8d77\u59cb\u884c\u8bf4\u660e\u8981\u505a\u4ec0\u4e48\uff0c\u7ed3\u6784\u4e3a\u65b9\u6cd5 + \u8bf7\u6c42URL + \u534f\u8bae\u7248\u672c\uff0c\u4e2d\u95f4\u7528\u7a7a\u683c\u505a\u5206\u9694\uff1a<\/p>\n<pre><code>GET \/api\/nht\/blog\/example HTTP\/1.1\r\n<\/code><\/pre>\n<p>\u54cd\u5e94\u62a5\u5934\u7684\u8d77\u59cb\u884c\u8bf4\u660e\u53d1\u751f\u4e86\u4ec0\u4e48\uff0c\u7ed3\u6784\u4e3a\u534f\u8bae\u7248\u672c + \u72b6\u6001\u7801 + \u63cf\u8ff0\u6587\u672c\uff0c\u4e2d\u95f4\u7528\u7a7a\u683c\u505a\u5206\u9694\uff1a<\/p>\n<pre><code>HTTP\/1.1 200 OK\r\n<\/code><\/pre>\n<h4 id=\"-9\">\u65b9\u6cd5\u4e0e\u72b6\u6001\u7801<\/h4>\n<p>\u65b9\u6cd5\u6765\u544a\u8bc9\u670d\u52a1\u7aef\u8bf7\u6c42\u62a5\u6587\u8981\u505a\u7684\u4e8b\u60c5\uff0c\u72b6\u6001\u7801\u6765\u901a\u77e5\u5ba2\u6237\u7aef\u670d\u52a1\u7aef\u4f9d\u636e\u8bf7\u6c42\u62a5\u6587\u5b8c\u6210\u52a8\u4f5c\u4e4b\u540e\u7684\u5927\u81f4\u7ed3\u679c\u3002 \u5e38\u89c1\u7684HTTP\u65b9\u6cd5\u5982\u4e0b\uff1a<\/p>\n<p>| \u65b9\u6cd5 | \u542b\u4e49 | \u6709\u65e0\u4e3b\u4f53 | | &#8212;&#8212;- | &#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;- | &#8212;&#8212;&#8211; | | GET | \u4ece\u670d\u52a1\u7aef\u83b7\u53d6\u8d44\u6e90 | \u65e0 | | HEAD | \u53ea\u83b7\u53d6\u8d44\u6e90\u5934\u90e8 | \u65e0 | | POST | \u5411\u670d\u52a1\u7aef\u53d1\u9001\u6570\u636e | \u6709 | | PUT | \u5c06\u5ba2\u6237\u7aef\u53d1\u9001\u7684\u6570\u636e\u5b58\u5230\u670d\u52a1\u7aef\uff0c\u5e94\u7528\u573a\u666f\u591a\u4e3a\u4fee\u6539 | \u6709 | | OPTIONS | \u5bf9\u670d\u52a1\u7aef\u8fdb\u884c\u9884\u68c0\uff0c\u4f8b\u5982\u670d\u52a1\u7aef\u652f\u6301\u54ea\u4e9b\u65b9\u6cd5 | \u65e0 | | DELETE | \u4ece\u670d\u52a1\u7aef\u5220\u9664\u8d44\u6e90 | \u65e0 |<\/p>\n<p>\u8bf7\u6c42\u5b8c\u6210\u65f6\uff0c\u54cd\u5e94\u62a5\u6587\u4e2d\u4f1a\u6709\u4e00\u4e2a\u72b6\u6001\u7801\uff0c\u7528\u6765\u8868\u793a\u6b64\u6b21\u8bf7\u6c42\u7684\u72b6\u6001\uff0c\u662f\u6210\u529f\u4e86\u8fd8\u662f\u5931\u8d25\u4e86\uff0c\u6216\u8005\u65f6\u9700\u8981\u91cd\u5b9a\u5411\u3002\u72b6\u6001\u7801\u7684\u8303\u56f4\u4ece100\u5230599\uff0c \u5176\u4e2d\u6709\u90e8\u5206\u662f\u5df2\u7ecf\u5b9a\u4e49\u7684\u3002\u4e0d\u540c\u7684\u8303\u56f4\u8868\u793a\u7684\u542b\u4e49\u4e5f\u4e0d\u540c\uff1a<\/p>\n<p>| \u8303\u56f4 | \u5df2\u5b9a\u4e49\u8303\u56f4 | \u542b\u4e49 | | &#8212;&#8212;- | &#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;- | &#8212;&#8212;&#8212;- | | 100~199 | 100~101 | \u4fe1\u606f\u63d0\u793a | | 200~299 | 200~206 | \u6210\u529f | | 300~399 | 300~305 | \u91cd\u5b9a\u5411 | | 400~499 | 400~415 | \u5ba2\u6237\u7aef\u9519\u8bef | | 500~599 | 500~505 | \u670d\u52a1\u7aef\u9519\u8bef |<\/p>\n<h3 id=\"-10\">\u9996\u90e8<\/h3>\n<p>\u9996\u90e8\u662f\u8bf7\u6c42\u548c\u54cd\u5e94\u62a5\u6587\u4e2d\u7684\u4e00\u4e9b\u4fe1\u606f\uff0c\u5f62\u5f0f\u4e3a\u952e\u503c\u5bf9\uff0c\u6bcf\u5bf9\u952e\u503c\u7ed3\u5c3e\u662fCRLF\u6362\u884c\u7b26\uff0c\u5b83\u51b3\u5b9a\u4e86\u8bf7\u6c42\u6216\u8005\u54cd\u5e94\u62a5\u6587\u7684\u5c5e\u6027\uff0c\u6bd4\u5982Content-Type\u8868\u660e\u4e86\u8bf7\u6c42\u4e3b\u4f53\u7684\u6570\u636e\u7c7b\u578b\uff0cDate\u8bf4\u660e\u4e86\u8bf7\u6c42\u7684\u521b\u5efa\u65f6\u95f4\u3002 \u5ba2\u6237\u7aef\u4e0e\u670d\u52a1\u7aef\u901a\u8fc7\u9996\u90e8\u6765\u534f\u5546\u5177\u4f53\u884c\u4e3a\u3002\u53ef\u4ee5\u6839\u636e\u8bf7\u6c42\u3001\u54cd\u5e94\u3001\u7ed3\u6784\u7b49\uff0c\u5c06\u9996\u90e8\u5206\u4e3a\u4e94\u79cd\u3002<\/p>\n<ul>\n<li>\u8bf7\u6c42\u9996\u90e8\uff1a\u662f\u653e\u5728\u8bf7\u6c42\u62a5\u6587\u4e2d\u7684\u9996\u90e8\uff0c\u5b83\u88ab\u7528\u6765\u544a\u8bc9\u670d\u52a1\u7aef\u4e00\u4e9b\u4fe1\u606f\u3002<\/li>\n<li>\u54cd\u5e94\u9996\u90e8\uff1a\u4e3a\u5ba2\u6237\u7aef\u63d0\u4f9b\u4e00\u4e9b\u53ef\u80fd\u7528\u5230\u7684\u4fe1\u606f\u3002<\/li>\n<li>\u901a\u7528\u9996\u90e8\uff1a\u8bf7\u6c42\u4e0e\u54cd\u5e94\u62a5\u6587\u90fd\u5305\u542b\u7684\u9996\u90e8\uff0c\u4f8b\u5982Date\u9996\u90e8<\/li>\n<li>\u5b9e\u4f53\u9996\u90e8\uff1a\u5bf9\u4e8e\u62a5\u6587\u5b9e\u4f53\u4e3b\u4f53\u90e8\u5206\u7684\u63cf\u8ff0\uff0c\u6bd4\u5982Content-Type\uff0c\u8868\u660e\u5176\u6570\u636e\u7c7b\u578b\u3002<\/li>\n<li>\u6269\u5c55\u9996\u90e8\uff1a\u5f00\u53d1\u8005\u81ea\u5df1\u6dfb\u52a0\u7684\u9996\u90e8\u5b57\u6bb5\uff0c\u7528\u6765\u6ee1\u8db3\u5b9a\u5236\u5316\u9700\u6c42\u3002<\/li>\n<\/ul>\n<h3 id=\"-11\">\u5b9e\u4f53<\/h3>\n<pre><code class=\"text language-text\">HTTP\/1.0 200 OK\r\nServer: xxxxxxx\r\nDate: Sun,17 Sep 2019 02:01:16 GMT\r\n--------------------------------\u5b9e\u4f53\u9996\u90e8\r\nContent-Type: text\/plain\r\nContent-length: 18\r\n--------------------------------\u5b9e\u4f53\u4e3b\u4f53\r\n\r\nHi! I\"m a message!\r\n--------------------------------\r\n<\/code><\/pre>\n<p>\u5b9e\u4f53\u90e8\u5206\u662f\u53ef\u9009\u7684\uff0c\u5b83\u88ab\u7528\u6765\u8fd0\u9001\u8bf7\u6c42\u6216\u8005\u54cd\u5e94\u7684\u6570\u636e\uff0c\u5b9e\u4f53\u7531\u5b9e\u4f53\u9996\u90e8 + \u5b9e\u4f53\u4e3b\u4f53\u7ec4\u6210\uff0c\u5b9e\u4f53\u9996\u90e8\u5bf9\u5b9e\u4f53\u4e3b\u4f53\u505a\u63cf\u8ff0\u3002HTTP\/1.1\u5b9a\u4e49\u4e86\u4ee5\u4e0b\u7684\u57fa\u672c\u5b9e\u4f53\u9996\u90e8\u5b57\u6bb5\uff1a<\/p>\n<ul>\n<li>Content-Type: \u5b9e\u4f53\u4e3b\u4f53\u4e2d\u7684\u6570\u636e\u7c7b\u578b\u3002<\/li>\n<li>Content-Length: \u5b9e\u4f53\u4e3b\u4f53\u7684\u957f\u5ea6\u6216\u8005\u5927\u5c0f\u3002<\/li>\n<li>Content-Language: \u548c\u4f20\u8f93\u7684\u6570\u636e\u6700\u5339\u914d\u7684\u8bed\u8a00\u3002<\/li>\n<li>Content-Encoding: \u6765\u6807\u8bc6\u670d\u52a1\u7aef\u7f16\u7801\u65f6\u6240\u7528\u7684\u7f16\u7801\u65b9\u5f0f\u3002<\/li>\n<li>Content-Location: \u8981\u8fd4\u56de\u7684\u6570\u636e\u7684\u5730\u5740\u3002<\/li>\n<li>Content-Range: \u5982\u679c\u662f\u90e8\u5206\u5b9e\u4f53\uff0c\u7528\u6765\u6807\u8bb0\u5b83\u662f\u5b9e\u4f53\u7684\u54ea\u4e2a\u90e8\u5206\u3002<\/li>\n<li>Content-MD5: \u5b9e\u4f53\u4e3b\u4f53\u5185\u5bb9\u7684\u6821\u9a8c\u548c\u3002<\/li>\n<li>Last-Modified: \u6240\u4f20\u8f93\u5185\u5bb9\u5728\u670d\u52a1\u5668\u4e0a\u521b\u5efa\u6216\u8005\u6700\u540e\u4fee\u6539\u7684\u65e5\u671f\u65f6\u95f4\u3002<\/li>\n<li>Expires: \u5b9e\u4f53\u6570\u636e\u8bd5\u4e0b\u7684\u65e5\u671f\u65f6\u95f4\u3002<\/li>\n<li>Allow: \u6240\u8bf7\u6c42\u8d44\u6e90\u5141\u8bb8\u7684\u8bf7\u6c42\u65b9\u6cd5\u3002<\/li>\n<li>ETag: \u8d44\u6e90\u7684\u7279\u5b9a\u7248\u672c\u7684\u6807\u8bc6\u7b26\u3002\u53ef\u4ee5\u8ba9\u7f13\u5b58\u66f4\u9ad8\u6548\uff0c\u5e76\u8282\u7701\u5e26\u5bbd\u3002<\/li>\n<li>Cache-Control: \u63a7\u5236\u7f13\u5b58\u673a\u5236\u7684\u6307\u4ee4\u3002<\/li>\n<\/ul>\n<p>\u4ee5\u4e0a\u662fHTTP\u62a5\u6587\u5305\u542b\u7684\u4e3b\u8981\u7ed3\u6784\uff0c\u5f53\u8bf7\u6c42\u62a5\u6587\u5230\u8fbe\u670d\u52a1\u5668\u65f6\uff0c\u670d\u52a1\u5668\u4f1a\u5bf9\u62a5\u6587\u4e2d\u7684\u5185\u5bb9\u89e3\u6790\u51fa\u6765\uff0c\u6839\u636e\u65b9\u6cd5\u3001\u8d44\u6e90\u8def\u5f84\u3001\u9996\u90e8\u3001\u548c\u4e3b\u4f53\u6765\u5904\u7406\u8bf7\u6c42\uff0c\u7136\u540e\u901a\u8fc7\u5bf9\u8bf7\u6c42\u8d44\u6e90\u7684\u8bbf\u95ee\u7ed3\u679c\uff0c\u6765\u6784\u5efa\u54cd\u5e94\uff0c\u56de\u9001\u7ed9\u5ba2\u6237\u7aef\u3002<\/p>\n<h2 id=\"tcp\">\u4f20\u8f93\u5c42-TCP<\/h2>\n<p>HTTP\u8fde\u63a5\u662f\u5efa\u7acb\u5728TCP\u8fde\u63a5\u7684\u57fa\u7840\u4e4b\u4e0a\u7684\uff0cTCP\u63d0\u4f9b\u53ef\u9760\u7684\u6570\u636e\u8fde\u63a5\u3002\u5f53\u8981\u4f20\u8f93\u4e00\u4e2aHTTP\u62a5\u6587\u65f6\uff0c\u62a5\u6587\u6570\u636e\u4f1a\u4ee5\u6d41\u7684\u5f62\u5f0f\u901a\u8fc7\u4e00\u6761\u5df2\u7ecf\u6253\u5f00\u7684TCP\u8fde\u63a5\u6309\u987a\u5e8f\u4f20\u8f93\uff0cTCP\u4f1a\u5c06\u6536\u5230\u7684\u6570\u636e\u5206\u6210\u5c0f\u5757\uff0c\u6bcf\u5757\u662f\u4e00\u4e2aTCP\u5206\u7ec4\u3002<\/p>\n<p>\u7531\u4e8e\u6570\u636e\u662f\u5206\u6210\u5c0f\u5757\u53d1\u9001\u7684\uff0c\u6240\u4ee5\u5b8c\u6574\u53ef\u9760\u7684\u6570\u636e\u4f20\u8f93\u4e3b\u8981\u4f53\u73b0\u5728\uff1a\u5206\u7ec4\u662f\u5426\u5b8c\u6574\u3001\u5206\u7ec4\u987a\u5e8f\u662f\u5426\u6b63\u5e38\u3001\u5206\u7ec4\u662f\u5426\u635f\u574f\u3001\u5206\u7ec4\u6570\u636e\u662f\u5426\u91cd\u590d\u3002\u8fd9\u4e9b\u53ef\u4ee5\u901a\u8fc7TCP\u7684\u68c0\u9a8c\u548c\u3001\u5e8f\u5217\u53f7\u3001\u786e\u8ba4\u5e94\u7b54\u3001\u91cd\u53d1\u63a7\u5236\u3001\u8fde\u63a5\u7ba1\u7406\u548c\u7a97\u53e3\u673a\u5236\u6765\u63a7\u5236\u3002<\/p>\n<p>TCP\u662f\u4f20\u8f93\u63a7\u5236\u534f\u8bae\uff0c\u4f20\u8f93\u63a7\u5236\u4e3b\u8981\u4f9d\u8d56\u9996\u90e8\u5305\u542b\u76846\u4e2a\u6807\u5fd7\uff0c\u5b83\u4eec\u63a7\u5236\u62a5\u6587\u7684\u4f20\u8f93\u72b6\u6001\uff0c\u4ee5\u53ca\u53d1\u9001\u7aef\u548c\u63a5\u6536\u7aef\u5e94\u5bf9\u6570\u636e\u91c7\u53d6\u7684\u52a8\u4f5c\u3002\u5f53\u5b83\u4eec\u7684\u503c\u4e3a1\u65f6\uff0c\u6807\u5fd7\u5bf9\u5e94\u7684\u5404\u81ea\u529f\u80fd\u624d\u5141\u8bb8\u88ab\u6267\u884c\uff0c\u6bd4\u5982\u5f53URG\u4e3a1\u65f6\uff0c\u62a5\u6587\u9996\u90e8\u7684\u7d27\u6025\u6307\u9488\u90e8\u5206\u624d\u6709\u6548\u3002<\/p>\n<ul>\n<li>URG \u7d27\u6025\u6307\u9488<\/li>\n<li>ACK \u786e\u8ba4\u5e8f\u53f7\u6709\u6548<\/li>\n<li>PSH \u63a5\u6536\u65b9\u5e94\u8be5\u5c3d\u5feb\u5c06\u8fd9\u4e2a\u62a5\u6587\u6bb5\u4ea4\u7ed9\u5e94\u7528\u5c42\u3002<\/li>\n<li>RST \u91cd\u5efa\u8fde\u63a5<\/li>\n<li>SYN \u540c\u6b65\u5e8f\u53f7\u7528\u6765\u53d1\u8d77\u4e00\u4e2a\u8fde\u63a5<\/li>\n<li>FIN \u53d1\u7aef\u5b8c\u6210\u53d1\u9001\u4efb\u52a1<\/li>\n<\/ul>\n<p><strong>\u6e90\u7aef\u53e3\u548c\u76ee\u7684\u7aef\u53e3\uff1a<\/strong> \u6807\u8bc6\u53d1\u9001\u65b9\u548c\u63a5\u6536\u65b9\u7684\u7aef\u53e3\u53f7\uff0c\u4e00\u4e2aTCP\u8fde\u63a5\u901a\u8fc74\u4e2a\u503c\u786e\u8ba4\uff1a<code>\u6e90IP\u3001\u6e90\u7aef\u53e3\u3001\u76ee\u7684IP\u3001\u76ee\u7684\u7aef\u53e3<\/code>\uff0c\u5176\u4e2d\u6e90IP\u548c\u76ee\u7684IP\u5305\u542b\u5728IP\u5206\u7ec4\u5185\u3002<\/p>\n<p><strong>\u9996\u90e8\u957f\u5ea6\uff1a<\/strong> \u8868\u793aTCP\u9996\u90e8\u7684\u5b57\u8282\u957f\u5ea6\uff0c\u4e5f\u80fd\u6807\u8bb0\u51fa\u4ece\u591a\u5c11\u4e2a\u5b57\u8282\u5f00\u59cb\uff0c\u624d\u662f\u9700\u8981\u4f20\u8f93\u7684\u6570\u636e\u3002<\/p>\n<p><strong>TCP\u6bb5\u5e8f\u53f7\uff1a<\/strong> \u672c\u6bb5\u62a5\u6587\u53d1\u9001\u7684\u6570\u636e\u7b2c\u4e00\u4e2a\u5b57\u8282\u7684\u5e8f\u53f7\uff0c\u6bcf\u6bb5\u62a5\u6587\u4e2d\u7684\u6570\u636e\u7684\u6bcf\u4e2a\u5b57\u8282\u90fd\u6709\u5e8f\u53f7\uff0c\u7b2c\u4e00\u4e2a\u5b57\u8282\u7684\u5e8f\u53f7\u4ece0\u5f00\u59cb\uff0c\u4f9d\u6b21\u52a01\uff0c\u52a0\u52302\u768432\u6b21\u65b9\u51cf1\u540e\u518d\u6b21\u4ece0\u5f00\u59cb\u3002<\/p>\n<p><strong>TCP\u6bb5\u786e\u8ba4\u5e8f\u53f7 \uff1a<\/strong> <code>\u5f53\u9996\u90e8\u6807\u5fd7ACK\u4e3a1\u65f6<\/code>\uff0c\u786e\u8ba4\u5e8f\u53f7\u6709\u6548\u3002TCP\u6bb5\u88ab\u63a5\u6536\u7aef\u63a5\u6536\u540e\uff0c\u4f1a\u56de\u9001\u7ed9\u53d1\u9001\u7aef\u4e00\u4e2a\u786e\u8ba4\u53f7\uff0c\u4e3a\u4e0a\u6b21\u63a5\u53d7\u7684\u6700\u540e\u4e00\u4e2a\u5b57\u8282\u5e8f\u53f7\u52a01\u3002<\/p>\n<p><strong>\u68c0\u9a8c\u548c\uff1a<\/strong> \u7531\u53d1\u9001\u7aef\u8ba1\u7b97\uff0c\u63a5\u6536\u7aef\u9a8c\u8bc1\uff0c\u5982\u679c\u63a5\u6536\u65b9\u68c0\u6d4b\u5230\u68c0\u9a8c\u548c\u4e0d\u6b63\u786e\uff0c\u8868\u660e\u8be5TCP\u6bb5\u53ef\u80fd\u6709\u635f\u574f\uff0c\u4f1a\u88ab\u4e22\u5f03\uff0c\u540c\u65f6\u63a5\u6536\u7aef\u5411\u56de\u9001\u4e00\u4e2a\u91cd\u590d\u7684\u786e\u8ba4\u53f7\uff08\u4e0e\u6700\u8fd1\u7684\u4e00\u6b21\u6b63\u786e\u7684\u62a5\u6587\u4f20\u8f93\u7684\u786e\u8ba4\u53f7\u91cd\u590d\uff09\uff0c\u8868\u660e\u63a5\u6536\u5230\u7684TCP\u6bb5\u662f\u9519\u8bef\u7684\uff0c\u5e76\u544a\u77e5\u81ea\u5df1\u5e0c\u671b\u6536\u5230\u7684\u5e8f\u53f7\u3002\u8fd9\u65f6\u53d1\u9001\u7aef\u9700\u8981\u7acb\u5373\u91cd\u4f20\u51fa\u9519\u7684TCP\u6bb5\u3002<\/p>\n<p><strong>\u7d27\u6025\u6307\u9488\uff1a<\/strong> <code>\u5f53\u9996\u90e8\u6807\u5fd7URG\u4e3a1\u65f6<\/code>\uff0c\u7d27\u6025\u6307\u9488\u6709\u6548\uff0c\u8868\u793a\u53d1\u9001\u7aef\u5411\u63a5\u6536\u7aef\u8981\u53d1\u9001\u7d27\u6025\u6570\u636e\u3002\u7d27\u6025\u6307\u9488\u662f\u4e00\u4e2a\u6b63\u504f\u79fb\u91cf\uff0c\u5b83\u548cTCP\u6bb5\u5e8f\u53f7\u76f8\u52a0\uff0c\u8ba1\u7b97\u51fa\u7d27\u6025\u6570\u636e\u7684\u6700\u540e\u4e00\u4e2a\u5b57\u8282\u7684\u5e8f\u53f7\u3002\u6bd4\u5982\u63a5\u6536\u65b9\u63a5\u6536\u5230\u6570\u636e\uff0c\u4ece\u5e8f\u53f7\u4e3a1000\u7684\u5b57\u8282\u5f00\u59cb\u8bfb\u53d6\uff0c\u7d27\u6025\u6307\u9488\u4e3a1000\uff0c\u90a3\u4e48\u7d27\u6025\u6570\u636e\u5c31\u662f\u5e8f\u53f7\u4ece1000\u52302000\u4e4b\u95f4\u7684\u5b57\u8282\u3002\u8fd9\u4e9b\u6570\u636e\u7531\u63a5\u6536\u65b9\u51b3\u5b9a\u5982\u4f55\u5904\u7406\u3002<\/p>\n<p><strong>\u7a97\u53e3\u5c3a\u5bf8\uff1a<\/strong> \u51b3\u5b9a\u4e86TCP\u4e00\u6b21\u6210\u5757\u6570\u636e\u6d41\u7684\u541e\u5410\u91cf\u3002\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u5b83\u8868\u793a\u7684\u662f\u53d1\u9001\u4e00\u65b9\u7684\u5141\u8bb8\u5bf9\u65b9\u53d1\u9001\u7684\u6570\u636e\u91cf\uff0c\u6bd4\u5982\u53d1\u9001\u65b9\u9996\u90e8\u4e2d\u7684\u7a97\u53e3\u5927\u5c0f\u4e3a1000\uff0c\u5c31\u8868\u793a\u53d1\u9001\u65b9\u6700\u591a\u53ef\u4ee5\u63a5\u53d7\u5bf9\u65b9\u53d1\u6765\u76841000\u4e2a\u5b57\u8282\u7684\u6570\u636e\u91cf\u3002\u8fd9\u4e0e\u53d1\u9001\u65b9\u7684\u6570\u636e\u7f13\u5b58\u7a7a\u95f4\u6709\u5173\uff0c\u4f1a\u5f71\u54cdTCP\u7684\u6027\u80fd\u3002<\/p>\n<p><strong>\u9996\u90e8\u6807\u5fd7PSH\uff1a<\/strong> \u5982\u679c\u9700\u8981\u544a\u8bc9\u63a5\u6536\u65b9\u5c06\u6570\u636e\u7acb\u5373\u5168\u90e8\u63d0\u4ea4\u7ed9\u63a5\u6536\u8fdb\u7a0b\uff0c\u53d1\u9001\u65b9\u9700\u8981\u5c06PSH\u7f6e\u4e3a1\uff0c\u8fd9\u91cc\u7684\u6570\u636e\u662f\u548cPSH\u4e00\u8d77\u4f20\u9001\u7684\u6570\u636e\u4ee5\u53ca\u4e4b\u524d\u63a5\u6536\u5230\u7684\u5168\u90e8\u6570\u636e\u3002\u5982\u679c\u63a5\u6536\u65b9\u6536\u5230\u4e86PSH\u4e3a1\u7684\u6807\u5fd7\uff0c\u9700\u8981\u7acb\u5373\u5c06\u6570\u636e\u63d0\u4ea4\u7ed9\u63a5\u6536\u8fdb\u7a0b\uff0c\u4e0d\u7528\u518d\u7b49\u5f85\u6709\u6ca1\u6709\u5176\u4ed6\u6570\u636e\u8fdb\u6765\u3002<\/p>\n<p><strong>\u590d\u4f4d\u6807\u5fd7RST\uff1a<\/strong> \u5f53RST\u4e3a1\u65f6\uff0c\u8868\u793a\u8fde\u63a5\u51fa\u73b0\u4e86\u5f02\u5e38\u60c5\u51b5\uff0c\u63a5\u6536\u65b9\u5c06\u7ec8\u6b62\u8fde\u63a5\uff0c\u901a\u77e5\u5e94\u7528\u5c42\u91cd\u65b0\u5efa\u7acb\u8fde\u63a5\u3002<\/p>\n<p><strong>\u540c\u6b65\u5e8f\u53f7SYN\uff1a<\/strong> \u7528\u6765\u5efa\u7acb\u8fde\u63a5\uff0c\u6d89\u53ca\u5230TCP\u7684\u4e09\u6b21\u63e1\u624b\u3002<\/p>\n<ol>\n<li>\u5f00\u59cb\u5efa\u7acb\u8fde\u63a5\u65f6\uff0c\u5ba2\u6237\u7aef\u5411\u670d\u52a1\u5668\u53d1\u9001\u4e00\u4e2aTCP\u5206\u7ec4\uff0c\u5206\u7ec4\u9996\u90e8\u7684SYN\u4e3a1\uff0c\u5e76\u643a\u5e26\u4e00\u4e2a\u521d\u59cb\u5e8f\u53f7\uff0c\u8868\u660e\u8fd9\u662f\u4e00\u4e2a\u8fde\u63a5\u8bf7\u6c42\u3002<\/li>\n<li>\u5982\u679c\u670d\u52a1\u5668\u63a5\u53d7\u4e86\u8fde\u63a5\uff0c\u4f1a\u5411\u5ba2\u6237\u7aef\u53d1\u9001\u4e00\u4e2aTCP\u5206\u7ec4\uff0c\u5206\u7ec4\u4e2d\u4f1a\u5305\u542bSYN\u548cACK\uff0c\u90fd\u4e3a1\uff0c\u540c\u65f6\u5305\u542b\u4e00\u4e2a\u786e\u8ba4\u5e8f\u53f7\uff0c\u503c\u4e3a\u6765\u81ea\u5ba2\u6237\u7aef\u7684\u521d\u59cb\u5e8f\u53f7 + 1\uff0c\u8868\u793a\u8fde\u63a5\u5df2\u7ecf\u88ab\u63a5\u53d7\u3002<\/li>\n<li>\u5ba2\u6237\u7aef\u6536\u5230\u4e0a\u4e00\u6b65\u53d1\u6765\u7684\u5206\u7ec4\u540e\uff0c\u4f1a\u518d\u5411\u670d\u52a1\u5668\u53d1\u9001\u4e00\u6bb5\u786e\u8ba4\u62a5\u6587\u5206\u7ec4\uff0cACK\u4e3a1\uff0c\u4f1a\u518d\u6b21\u643a\u5e26\u786e\u8ba4\u5e8f\u53f7\uff0c\u503c\u662f\u7b2c\u4e8c\u6b65\u6765\u81ea\u5ba2\u6237\u7aef\u7684\u786e\u8ba4\u5e8f\u53f7 + 1\u3002\u670d\u52a1\u7aef\u6536\u5230\u786e\u8ba4\u4fe1\u606f\u540e\uff0c\u8fdb\u5165\u5df2\u7ecf\u8fde\u63a5\u7684\u72b6\u6001\u3002<\/li>\n<\/ol>\n<p>\u5728\u7b2c\u4e09\u6b65\u7684\u786e\u8ba4\u5206\u7ec4\u4e2d\uff0c\u662f\u53ef\u4ee5\u643a\u5e26\u8981\u53d1\u9001\u7684\u6570\u636e\u7684\u3002<\/p>\n<p><strong>\u8fde\u63a5\u7ec8\u6b62\u6807\u5fd7FIN\uff1a<\/strong> 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id=\"ip\">\u7f51\u7edc\u5c42-IP<\/h2>\n<p>\u5982\u679c\u8bf4TCP\u5206\u7ec4\u662f\u5305\u88c5\u8d27\u7269\u7684\u96c6\u88c5\u7bb1\uff0c\u90a3\u4e48IP\u5c31\u662f\u8fd0\u9001\u96c6\u88c5\u7bb1\u7684\u5361\u8f66\u3002IP\u534f\u8bae\u63d0\u4f9b\u4e86\u4e24\u4e2a\u8282\u70b9\u4e4b\u95f4\u7684\u8fde\u63a5\uff0c\u4fdd\u8bc1\u5c06TCP\u6570\u636e\u5c3d\u53ef\u80fd\u5feb\u5730\u4ece\u6e90\u7aef\u9001\u5230\u7ec8\u7aef\uff0c\u4f46\u5374\u4e0d\u80fd\u4fdd\u8bc1\u4f20\u8f93\u7684\u53ef\u9760\u6027\u3002<\/p>\n<p>IP\u5c42\u4f1a\u5c06\u4e0a\u5c42\u4f20\u8fc7\u6765\u7684TCP\u5206\u7ec4\u5c01\u88c5\uff0c\u5e26\u4e0a\u81ea\u5df1\u7684\u9996\u90e8\uff0c\u518d\u8fdb\u884c\u9009\u8def\u3001\u662f\u5426\u5206\u7247\u4ee5\u53ca\u91cd\u7ec4\u7684\u5de5\u4f5c\uff0c\u6700\u7ec8\u5230\u8fbe\u76ee\u7684\u5730\uff0c\u8fd9\u4e2a\u8fc7\u7a0b\u4e2d\uff0cIP\u9996\u90e8\u8d77\u4e86\u91cd\u8981\u7684\u4f5c\u7528\uff0c\u4e0b\u9762\u8ba9\u6211\u4eec\u770b\u4e00\u4e0b\u9996\u90e8\u7684\u7ed3\u6784\u3002<\/p>\n<h3 id=\"ip-1\">IP\u9996\u90e8<\/h3>\n<p><strong>\u7248\u672c\uff1a<\/strong> \u8868\u793a\u5f53\u524dIP\u534f\u8bae\u7684\u7248\u672c\uff0c\u76ee\u524d\u7248\u672c\u53f7\u662f4\uff0c\u8fd8\u6709\u4e00\u79cd\u662f6\uff0c\u4e5f\u5c31\u662fIPV4\u548cIPV6\uff0c\u5982\u679c\u53d1\u9001\u548c\u63a5\u6536\u8fd9\u4e24\u7aef\u7684\u7248\u672c\u4e0d\u4e00\u81f4\uff0c\u90a3\u4e48\u5f53\u524dIP\u6570\u636e\u62a5\u4f1a\u88ab\u4e22\u5f03\u3002<\/p>\n<p><strong>\u9996\u90e8\u957f\u5ea6\uff1a<\/strong> \u6574\u4e2a\u9996\u90e8\u7684\u957f\u5ea6\uff0c\u6700\u957f\u4e3a60\u5b57\u8282\u3002<\/p>\n<p><strong>\u670d\u52a1\u7c7b\u578b\uff08TOS\uff09\uff1a<\/strong> 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\u6821\u9a8c\u6570\u636e\u62a5\u7684\u5b8c\u6574\u6027\uff0c\u53d1\u9001\u7aef\u5bf9\u9996\u90e8\u8fdb\u884c\u6c42\u548c\uff0c\u5c06\u7ed3\u679c\u5b58\u5728\u68c0\u9a8c\u548c\u4e2d\uff0c\u63a5\u6536\u7aef\u518d\u8ba1\u7b97\u4e00\u904d\uff0c\u5982\u679c\u8ba1\u7b97\u7ed3\u679c\u4e0e\u5b58\u5728\u68c0\u9a8c\u548c\u4e2d\u7684\u7ed3\u679c\u4e00\u81f4\uff0c\u5219\u8bf4\u660e\u4f20\u8f93\u8fc7\u7a0b\u662fOK\u7684\uff0c\u5426\u5219\u8fd9\u4e2a\u6570\u636e\u62a5\u5c31\u4f1a\u88ab\u4e22\u5f03\u3002<\/p>\n<p><strong>\u4e0a\u5c42\u534f\u8bae\uff1a<\/strong> \u51b3\u5b9a\u4e86\u63a5\u6536\u7aef\u5728\u5206\u7528\u7684\u65f6\u5019\u5c06\u6570\u636e\u4ea4\u7ed9\u54ea\u4e2a\u4e0a\u5c42\u534f\u8bae\u53bb\u5904\u7406\uff0c\u4f8b\u5982TCP\u6216\u8005UDP\u3002<\/p>\n<p><strong>\u6e90IP\uff1a<\/strong> \u8bb0\u5f55\u4e86\u53d1\u9001\u7aef\u7684IP\uff0c\u5728\u56de\u9001\u9519\u8bef\u6d88\u606f\u65f6\u7528\u5230\u3002<\/p>\n<p><strong>\u76ee\u7684IP\uff1a<\/strong> \u8868\u793a\u76ee\u7684IP\uff0c\u6bcf\u4e00\u6b21\u9009\u8def\u90fd\u8981\u4ee5\u5b83\u6765\u505a\u51b3\u7b56\u3002<\/p>\n<h3 id=\"-12\">\u8def\u7531\u9009\u62e9<\/h3>\n<p>\u56e0\u4e3aIP\u9996\u90e8\u53ea\u5305\u542b\u4e86\u76ee\u7684IP\u5730\u5740\uff0c\u5e76\u4e0d\u4f53\u73b0\u5b8c\u6574\u7684\u8def\u5f84\uff0c\u5f53\u5411\u5916\u53d1\u9001\u6570\u636e\u65f6\uff0cIP\u5c42\u4f1a\u6839\u636e\u76ee\u7684IP\u5728\u672c\u673a\u8def\u7531\u8868\u4e2d\u7684\u67e5\u8be2\u7ed3\u679c\u6765\u505a\u51fa\u9009\u8def\u51b3\u7b56\uff0c\u6570\u636e\u62a5\u4f1a\u9010\u8df3\u5730\u88ab\u8fd0\u9001\u5230\u76ee\u7684\u5730\uff0c\u8fd9\u91cc\u7684\u6bcf\u4e00\u8df3\uff0c\u5c31\u662f\u4e00\u6b21\u8def\u7531\u9009\u62e9\u3002<\/p>\n<p>IP\u5c42\u65e2\u53ef\u914d\u7f6e\u6210\u8def\u7531\u5668\uff0c\u4e5f\u53ef\u4ee5\u914d\u7f6e\u6210\u4e3b\u673a\u3002\u5f53\u914d\u7f6e\u6210\u8def\u7531\u529f\u80fd\u65f6\uff0c\u53ef\u4ee5\u5bf9\u6570\u636e\u62a5\u8fdb\u884c\u8f6c\u53d1\uff0c\u914d\u7f6e\u6210\u4e3b\u673a\u65f6\uff0c\u5982\u679c\u76ee\u7684IP\u4e0d\u662f\u672c\u673aIP\uff0c\u6570\u636e\u62a5\u4f1a\u88ab\u4e22\u5f03\u3002<\/p>\n<p>\u5177\u6709\u8def\u7531\u529f\u80fd\u7684IP\u5c42\u5728\u5f53\u76ee\u6807IP\u4e0d\u662f\u672c\u673a\u5730\u5740\u7684\u65f6\u5019\u662f\u6839\u636e\u4ec0\u4e48\u5224\u65ad\u8f6c\u53d1\u5230\u54ea\u4e00\u7ad9\u5462\uff1f\u8981\u7406\u89e3\u8fd9\u4e2a\u95ee\u9898\uff0c\u9700\u8981\u5148\u660e\u767d\u8def\u7531\u8868\u7684\u7ed3\u6784\uff0c\u4ee5\u4e0b\u662fIP\u5c42\u7ef4\u62a4\u7684\u8def\u7531\u8868\uff0c\uff08windows\u7cfb\u7edf\u53ef\u4ee5\u5728\u63a7\u5236\u53f0\u8f93\u5165netstat -r\u6765\u67e5\u770b\u8def\u7531\u8868\uff09<\/p>\n<p>| Destination | Gateway | Flags| Refcnt| Use | Interface| | &#8212;&#8212;&#8212;&#8212;&#8212;&#8212; | &#8212;&#8212;&#8212;&#8212;&#8212; | &#8212;&#8211;|&#8212;&#8212; |&#8212;- | &#8212;&#8212;&#8212;| | 140.252.13.65 | 140.252.13.35 | UGH | 0 | 0 | emd0 | | 127.0.0.1 | 127.0.0.1 | UH | 1 | 0 | lo0 | | default | 140.252.13.33 | UG | 0 | 0 | emd0 | | 140.252.13.32 | 140.252.13.34 | U | 4 |25043| emd0 |<\/p>\n<p>\uff08\u8def\u7531\u8868\u6570\u636e\u6765\u6e90\u4e8e\u300aTCP\/IP\u8be6\u89e3\u5377\u4e00\uff1a\u534f\u8bae\u300b\uff09<\/p>\n<ul>\n<li>Destination\uff08\u76ee\u7684IP\uff09\uff1a\u8868\u793aIP\u6570\u636e\u62a5\u6700\u7ec8\u8981\u5230\u8fbe\u6216\u8005\u7ecf\u8fc7\u7684\u7f51\u7edc\u5730\u5740\u6216\u8005\u4e3b\u673a\u5730\u5740\u3002<\/li>\n<li>Gateway\uff08\u4e0b\u4e00\u8df3\u5730\u5740\uff09\uff1a\u5f53\u524d\u7ef4\u62a4\u8def\u7531\u8868\u8bbe\u5907\u7684\u76f8\u90bb\u8def\u7531\u5668\u7684\u5730\u5740<\/li>\n<li>Flags\uff08\u6807\u5fd7\uff09\uff1a\u8868\u793a\u5f53\u524d\u8fd9\u4e00\u6761\u8def\u7531\u8bb0\u5f55\u7684\u5c5e\u6027\uff0c\u5177\u4f53\u7528\u4e94\u4e2a\u4e0d\u540c\u7684\u6807\u5fd7\u6765\u8868\u793a\uff1a\n<ul>\n<li>U\uff1a\u8be5\u8def\u7531\u53ef\u4ee5\u4f7f\u7528<\/li>\n<li>G\uff1a\u5982\u679c\u6709\u8fd9\u4e2a\u6807\u5fd7\uff0c\u8868\u793a\u662f\u4e0b\u4e00\u8df3\u662f\u4e00\u4e2a\u7f51\u5173\uff0c\u5982\u679c\u6ca1\u6709\uff0c\u8868\u793a\u4e0b\u4e00\u8df3\u662f\u548c\u5f53\u524d\u8bbe\u5907\u5728\u4e00\u4e2a\u7f51\u6bb5\uff0c\u4e5f\u5c31\u662f\u53ef\u4ee5\u76f4\u63a5\u628a\u6570\u636e\u62a5\u53d1\u8fc7\u53bb<\/li>\n<li>H: \u4e0b\u4e00\u8df3\u662f\u4e00\u4e2a\u4e3b\u673a\u8fd8\u662f\u4e00\u4e2a\u7f51\u7edc\uff0c\u6709\u8fd9\u4e2a\u6807\u5fd7\uff0c\u8868\u793a\u4e3b\u673a\uff0c\u6ca1\u6709\uff0c\u5219\u8868\u793a\u4e0b\u4e00\u8df3\u7684\u8def\u7531\u662f\u4e00\u4e2a\u7f51\u7edc<\/li>\n<li>D\uff1a\u8be5\u8def\u7531\u662f\u7531\u91cd\u5b9a\u5411\u62a5\u6587\u521b\u5efa\u7684<\/li>\n<li>M\uff1a\u8be5\u8def\u7531\u5df2\u88ab\u91cd\u5b9a\u5411\u62a5\u6587\u4fee\u6539<\/li>\n<\/ul>\n<\/li>\n<li>Interface\uff1a\u5f53\u524d\u8def\u7531\u9879\u7684\u7269\u7406\u7aef\u53e3<\/li>\n<\/ul>\n<p>\u6bcf\u6536\u5230\u4e00\u4e2a\u6570\u636e\u62a5\u65f6\u5019\uff0cIP\u5c42\u5c31\u4f1a\u6839\u636e\u76ee\u7684IP\u5728\u8def\u7531\u8868\u91cc\u67e5\u8be2\uff0c\u6839\u636e\u67e5\u8be2\u72b6\u6001\u4f1a\u5bfc\u5411\u4e09\u79cd\u7ed3\u679c\uff1a<\/p>\n<ol>\n<li>\u627e\u5230\u4e86\u4e0e\u76ee\u7684IP\u5b8c\u5168\u5339\u914d\u7684\u8def\u7531\u9879\uff0c\u5c06\u62a5\u6587\u53d1\u7ed9\u8be5\u8def\u7531\u9879\u7684\u4e0b\u4e00\u7ad9\u8def\u7531\uff08Gateway\uff09\u6216\u8005\u7f51\u7edc\u63a5\u53e3\uff08Interface\uff09<\/li>\n<li>\u627e\u5230\u4e86\u4e0e\u76ee\u7684IP\u7684\u7f51\u7edc\u53f7\u5339\u914d\u7684\u8def\u7531\u9879\uff0c\u5c06\u62a5\u6587\u53d1\u7ed9\u8be5\u8def\u7531\u9879\u7684\u4e0b\u4e00\u7ad9\u8def\u7531\uff08Gateway\uff09\u6216\u8005\u7f51\u7edc\u63a5\u53e3\uff08Interface\uff09<\/li>\n<li>\u524d\u4e24\u8005\u90fd\u6ca1\u6709\u627e\u5230\uff0c\u5c31\u770b\u8def\u7531\u8868\u91cc\u6709\u6ca1\u6709\u9ed8\u8ba4\u8def\u7531\u9879\uff08default\uff09\uff0c\u6709\u7684\u8bdd\u53d1\u7ed9\u5b83\u6307\u5b9a\u7684\u4e0b\u4e00\u7ad9\u8def\u7531\uff08Gateway\uff09<\/li>\n<\/ol>\n<p>\u8981\u662f\u4e0a\u8fb9\u4e09\u4e2a\u90fd\u6ca1\u6709\u7ed3\u679c\uff0c\u90a3\u4e48\u6570\u636e\u62a5\u5c31\u4e0d\u80fd\u88ab\u53d1\u9001\u3002IP\u6570\u636e\u62a5\u5c31\u662f\u8fd9\u6837\u4e00\u8df3\u4e00\u8df3\u5730\u88ab\u9001\u5f80\u76ee\u7684\u4e3b\u673a\u7684\uff0c\u4f46\u6570\u636e\u62a5\u6709\u56fa\u6709\u7684\u957f\u5ea6\uff0c\u4e00\u65e6\u8d85\u51fa\u4e86\u76ee\u7684\u4e3b\u673a\u7684MTU\uff0c\u5c31\u4f1a\u88ab\u5206\u7247\u3002<\/p>\n<h3 id=\"-13\">\u6570\u636e\u62a5\u5206\u7247\u7684\u6982\u5ff5<\/h3>\n<p>TCP\u5728\u8fdb\u884c\u63e1\u624b\u7684\u65f6\u5019\uff0c\u4f1a\u6839\u636e\u76ee\u7684\u7aefIP\u5c42\u7684\u6700\u5927\u4f20\u8f93\u5355\u5143\uff08MTU\uff09\u6765\u51b3\u5b9aTCP\u6570\u636e\u6bcf\u6b21\u80fd\u4f20\u8f93\u7684\u6700\u5927\u6570\u636e\u91cf\uff08MSS\uff09\uff0c\u4e4b\u540eTCP\u4f1a\u5bf9\u6570\u636e\u4f9d\u7167MSS\u6765\u8fdb\u884c\u5206\u7ec4\uff0c\u6bcf\u4e2a\u5206\u7ec4\u4f1a\u88ab\u5305\u88c5\u8fdb\u4e00\u4e2aIP\u6570\u636e\u62a5\u5185\u3002\u5f53IP\u6570\u636e\u62a5\u7ecf\u8fc7\u9009\u8def\u8fc7\u7a0b\u4e2d\u7684\u4efb\u610f\u4e00\u5c42\u8def\u7531\u65f6\uff0c\u6709\u53ef\u80fd\u88abMTU\u9650\u5236\u4f4f\u4ece\u800c\u88ab\u5206\u7247\uff0c\u8fd9\u65f6IP\u9996\u90e8\u76843bit\u6807\u5fd7\u4e2d\u7684M\u6807\u5fd7\u88ab\u7f6e\u4e3a1\uff0c\u8868\u793a\u9700\u8981\u5206\u7247\u3002\u6bcf\u4e2a\u5206\u7247\u7684\u9996\u90e8\u57fa\u672c\u4e00\u6837\uff0c\u53ea\u662f\u7247\u504f\u79fb\u6709\u6240\u4e0d\u540c\u3002\u4f9d\u636e\u7247\u504f\u79fb\uff0c\u8fd9\u4e9b\u5206\u7247\u5728\u76ee\u7684\u7aef\u88ab\u91cd\u7ec4\u6210\u4e00\u4e2a\u5b8c\u6574\u7684IP\u6570\u636e\u62a5\uff08\u4e00\u4e2aTCP\u5206\u7ec4\uff09\u3002IP\u4f20\u8f93\u662f\u65e0\u5e8f\u7684\uff0c\u6240\u4ee5\u5f97\u5230\u7684\u6570\u636e\u62a5\u4e5f\u662f\u65e0\u5e8f\u7684\uff0c\u4f46\u5982\u679c\u6570\u636e\u5b8c\u6574\uff0cTCP\u4f1a\u6839\u636e\u9996\u90e8\u4e2d\u7684\u5b57\u6bb5\u5bf9\u5176\u8fdb\u884c\u6392\u5e8f\u3002\u4e00\u65e6IP\u5206\u7247\u4e22\u5931\uff0cIP\u5c42\u65e0\u6cd5\u7ec4\u6210\u5b8c\u6574\u7684\u6570\u636e\u62a5\uff0c\u5c31\u4f1a\u544a\u8bc9TCP\u5c42\uff0cTCP\u8fdb\u884c\u91cd\u4f20\u3002<\/p>\n<p>\u5f53IP\u5c42\u5c06\u6570\u636e\u5c01\u88c5\u597d\u4e4b\u540e\uff0c\u53ea\u6709\u76ee\u6807\u4e3b\u673a\u7684IP\u5730\u5740\u3002\u5149\u6709IP\u5730\u5740\u5e76\u4e0d\u80fd\u76f4\u63a5\u628a\u6570\u636e\u62a5\u53d1\u9001\u8fc7\u53bb\uff0c\u56e0\u4e3a\u6bcf\u4e00\u53f0\u786c\u4ef6\u8bbe\u5907\u90fd\u6709\u81ea\u5df1\u7684MAC\u5730\u5740\uff0c\u662f\u4e00\u4e2a48bit\u7684\u503c\u3002\u73b0\u5728\u77e5\u9053\u76ee\u6807IP\u7684\u5730\u5740\uff0c\u9700\u8981\u627e\u5230\u8fd9\u4e2aIP\u5bf9\u5e94\u7684MAC\u5730\u5740\u3002\u8fd9\u4e2a\u8fc7\u7a0b\u8981\u901a\u8fc7\u67e5\u8be2\u8def\u7531\u8868\uff0c\u518d\u7ed3\u5408\u94fe\u8def\u5c42\u7684ARP\u534f\u8bae\uff0c\u6700\u7ec8\u83b7\u5f97\u76ee\u6807IP\u5bf9\u5e94\u7684MAC\u5730\u5740\u3002<\/p>\n<h2 id=\"arp\">\u5730\u5740\u89e3\u6790\u534f\u8bae\uff1aARP<\/h2>\n<p>IP\u53ea\u80fd\u8ba9\u6570\u636e\u5728\u903b\u8f91\u7aef\u70b9\u4e4b\u95f4\u6d41\u52a8\uff0c\u4f46\u662fIP\u4e4b\u4e0b\u8fd8\u6709\u7f51\u7edc\u63a5\u53e3\u5c42\uff0c\u8fd9\u4e00\u5c42\u4e5f\u6709\u81ea\u5df1\u7684\u5730\u5740\uff08MAC\u5730\u5740\uff1a\u7528\u4e8e\u5728\u7f51\u7edc\u4e2d\u552f\u4e00\u6807\u8bc6\u4e00\u4e2a\u7f51\u5361\uff09\uff0c\u4eceIP\u5730\u5740\u5230MAC\u5730\u5740\u9700\u8981\u4e00\u4e2a\u8f6c\u6362\u7684\u8fc7\u7a0b\uff0cARP\u5c31\u662f\u63d0\u4f9b\u8fd9\u4e00\u670d\u52a1\u7684\u3002<\/p>\n<p>ARP\u534f\u8bae\u5b9e\u73b0\u4e86\u4eceIP\u5730\u5740\u5230MAC\u5730\u5740\u7684\u6620\u5c04\u3002\u4e00\u5f00\u59cb\uff0c\u8d77\u70b9\u5e76\u4e0d\u77e5\u9053\u76ee\u6807\u7684MAC\u5730\u5740\uff0c\u53ea\u6709\u76ee\u6807IP\uff0c\u8981\u83b7\u53d6\u8fd9\u4e2a\u5730\u5740\u5c31\u6d89\u53ca\u5230\u4e86ARP\u7684\u8bf7\u6c42\u548c\u5e94\u7b54\u3002\u540c\u6837\uff0cARP\u4e5f\u6709\u81ea\u5df1\u7684\u5206\u7ec4\uff0c\u5148\u770b\u4e00\u4e0b\u5206\u7ec4\u683c\u5f0f\u3002<\/p>\n<h3 id=\"arp-1\">ARP\u5206\u7ec4\u683c\u5f0f<\/h3>\n<p><strong>\u4ee5\u592a\u7f51\u76ee\u7684\u5730\u5740\uff1a<\/strong> \u76ee\u7684\u7aef\u7684MAC\u5730\u5740\uff0c\u5f53ARP\u7f13\u5b58\u8868\u4e2d\u6ca1\u6709\u7684\u65f6\u5019\uff0c\u8fd9\u91cc\u4e3a\u5e7f\u64ad\u5730\u5740\u3002<\/p>\n<p><strong>\u4ee5\u592a\u7f51\u6e90\u5730\u5740\uff1a<\/strong> \u53d1\u9001\u7aef\u7684MAC\u5730\u5740\u3002<\/p>\n<p><strong>\u5e27\u7c7b\u578b\uff1a<\/strong> \u4e0d\u540c\u7684\u5e27\u7c7b\u578b\u6709\u4e0d\u540c\u7684\u683c\u5f0f\u548cMTU\u503c\uff0c\u4e0d\u540c\u7684\u7c7b\u578b\u6709\u4e0d\u540c\u7684\u7f16\u53f7\uff0c\u8fd9\u91ccARP\u5bf9\u5e94\u7684\u7f16\u53f7\u662f0x0806\u3002<\/p>\n<p><strong>\u786c\u4ef6\u7c7b\u578b\uff1a<\/strong> \u6307\u94fe\u8def\u5c42\u7f51\u7edc\u7c7b\u578b\uff0c1\u4e3a\u4ee5\u592a\u7f51\u3002<\/p>\n<p><strong>\u534f\u8bae\u7c7b\u578b\uff1a<\/strong> 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id=\"-14\">\u4ee5\u592a\u7f51\u6570\u636e\u5e27<\/h2>\n<p>\u4e0a\u9762\u6240\u6709\u4e1c\u897f\u90fd\u51c6\u5907\u597d\u4e86\uff0c\u5c01\u88c5\u53d1\u9001\u7684\u5176\u5b9e\u662f\u4ee5\u592a\u7f51\u6570\u636e\u5e27\u3002\u4ee5\u592a\u7f51\u76ee\u7684\u5730\u5740\u3001\u4ee5\u592a\u7f51\u6e90\u5730\u5740\u3001\u5e27\u7c7b\u578b\u8fd9\u4e09\u8005\u7ec4\u6210\u4e86\u5e27\u9996\u90e8\u3002\u5728\u9996\u90e8\u4e4b\u524d\u8fd8\u4f1a\u63d2\u5165\u524d\u540c\u6b65\u7801\u548c\u5e27\u5f00\u59cb\u5b9a\u754c\u7b26\uff0c\u544a\u77e5\u63a5\u6536\u7aef\u505a\u4e00\u4e9b\u51c6\u5907\u5de5\u4f5c\u3002\u5e27\u68c0\u9a8c\u5e8f\u5217 FCS\u88ab\u6dfb\u52a0\u8fdb\u5c3e\u90e8\uff0c\u7528\u6765\u68c0\u6d4b\u5e27\u662f\u5426\u51fa\u9519\u3002<\/p>\n<h3 id=\"-15\">\u7ed3\u6784<\/h3>\n<p><strong>\u524d\u540c\u6b65\u7801\uff1a<\/strong> 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\u51b3\u5b9a\u63a5\u6536\u5230\u5e27\u4e4b\u540e\u5c06\u6570\u636e\u4ea4\u7531\u90a3\u79cd\u534f\u8bae\u5904\u7406\u3002<\/p>\n<p><strong>\u6570\u636e\uff1a<\/strong> \u4ea4\u7ed9\u4e0a\u5c42\u7684\u6570\u636e\u3002\u5728\u672c\u6587\u7684\u573a\u666f\u4e2d\u6307IP\u6570\u636e\u62a5\u3002<\/p>\n<p><strong>\u5e27\u68c0\u9a8c\u5e8f\u5217\uff1a<\/strong> \u68c0\u6d4b\u8fd9\u4e00\u5e27\u662f\u5426\u51fa\u9519\uff0c\u53d1\u9001\u65b9\u8ba1\u7b97\u5e27\u7684\u5faa\u73af\u5197\u4f59\u7801\u6821\u9a8c\uff08CRC\uff09\u503c\uff0c\u628a\u8fd9\u4e2a\u503c\u5199\u5230\u5e27\u91cc\u3002\u63a5\u6536\u65b9\u8ba1\u7b97\u673a\u91cd\u65b0\u8ba1\u7b97 CRC\uff0c\u4e0e FCS \u5b57\u6bb5\u7684\u503c\u8fdb\u884c\u6bd4\u8f83\u3002\u5982\u679c\u4e24\u4e2a\u503c\u4e0d\u76f8\u540c\uff0c\u5219\u8868\u793a\u4f20\u8f93\u8fc7\u7a0b\u4e2d\u53d1\u751f\u4e86\u6570\u636e\u4e22\u5931\u6216\u6539\u53d8\u3002\u8fd9\u65f6\uff0c\u5c31\u9700\u8981\u91cd\u65b0\u4f20\u8f93\u8fd9\u4e00\u5e27\u3002<\/p>\n<h3 id=\"-16\">\u4f20\u8f93\u548c\u63a5\u6536<\/h3>\n<ol>\n<li>\u63a5\u6536\u5230\u4e0a\u5c42\u4f20\u8fc7\u6765\u7684\u6570\u636e\u62a5\u4e4b\u540e\uff0c\u6839\u636eMTU\u4ee5\u53ca\u6570\u636e\u62a5\u5927\u5c0f\u6765\u51b3\u5b9a\u662f\u5426\u5206\u5272\u6210\u5c0f\u5757\uff0c\u4e5f\u5c31\u662fIP\u6570\u636e\u62a5\u88ab\u5206\u7247\u7684\u8fc7\u7a0b\u3002<\/li>\n<li>\u628a\u6570\u636e\u62a5\uff08\u5757\uff09\u5c01\u88c5\u6210\u4e00\u5e27\uff0c\u4f20\u7ed9\u5e95\u5c42\u7ec4\u4ef6\uff0c\u5e95\u5c42\u7ec4\u4ef6\u5c06\u5e27\u8f6c\u6362\u4e3a\u6bd4\u7279\u6d41\uff0c\u5e76\u53d1\u9001\u51fa\u53bb\u3002<\/li>\n<li>\u4ee5\u592a\u7f51\u4e0a\u7684\u8bbe\u5907\u63a5\u6536\u5230\u5e27\uff0c\u68c0\u67e5\u5e27\u91cc\u8fb9\u7684\u76ee\u6807\u5730\u5740\uff0c\u5982\u679c\u4e0e\u672c\u673a\u5730\u5740\u5339\u914d\uff0c\u5e27\u5c31\u4f1a\u88ab\u5904\u7406\uff0c\u4e00\u5c42\u4e00\u5c42\u5411\u4e0a\u4f20\u9012\uff08\u5206\u7528\u8fc7\u7a0b\uff09\u3002<\/li>\n<\/ol>\n<h1 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