{"id":24617,"date":"2025-04-19T10:28:57","date_gmt":"2025-04-19T02:28:57","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/24617.html"},"modified":"2025-04-19T10:28:57","modified_gmt":"2025-04-19T02:28:57","slug":"%e3%80%90tcp%e3%80%91%e4%b8%89%e6%ac%a1%e6%8f%a1%e6%89%8b%ef%bc%8c%e5%9b%9b%e6%ac%a1%e6%8c%a5%e6%89%8b%e8%af%a6%e8%a7%a3-udp%e5%92%8ctcp%e5%8d%8f%e8%ae%ae%e8%af%a6%e8%a7%a3","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/24617.html","title":{"rendered":"\u3010TCP\u3011\u4e09\u6b21\u63e1\u624b\uff0c\u56db\u6b21\u6325\u624b\u8be6\u89e3--UDP\u548cTCP\u534f\u8bae\u8be6\u89e3"},"content":{"rendered":"

\u6d3b\u52a8\u53d1\u8d77\u4eba@\u5c0f\u865a\u7af9<\/span> \u60f3\u5bf9\u4f60\u8bf4：<\/p>\n

\u8fd9\u662f\u4e00\u4e2a\u4ee5\u5199\u4f5c\u535a\u5ba2\u4e3a\u76ee\u7684\u7684\u521b\u4f5c\u6d3b\u52a8，\u65e8\u5728\u9f13\u52b1\u5927\u5b66\u751f\u535a\u4e3b\u4eec\u6316\u6398\u81ea\u5df1\u7684\u521b\u4f5c\u6f5c\u80fd，\u5c55\u73b0\u81ea\u5df1\u7684\u5199\u4f5c\u624d\u534e\u3002\u5982\u679c\u4f60\u662f\u4e00\u4f4d\u70ed\u7231\u5199\u4f5c\u7684\u3001\u60f3\u8981\u5c55\u73b0\u81ea\u5df1\u521b\u4f5c\u624d\u534e\u7684\u5c0f\u4f19\u4f34，\u90a3\u4e48，\u5feb\u6765\u53c2\u52a0\u5427！\u6211\u4eec\u4e00\u8d77\u53d1\u6398\u5199\u4f5c\u7684\u9b45\u529b，\u4e66\u5199\u51fa\u5c5e\u4e8e\u6211\u4eec\u7684\u6545\u4e8b\u3002\u6211\u4eec\u8bda\u631a\u9080\u8bf7\u4f60\u53c2\u52a0\u4e3a\u671f14\u5929\u7684\u521b\u4f5c\u6311\u6218\u8d5b！<\/p>\n

\u63d0\u9192：\u5728\u53d1\u5e03\u4f5c\u54c1\u524d，\u8bf7\u5c06\u4e0d\u9700\u8981\u7684\u5185\u5bb9\u5220\u9664\u3002<\/p>\n<\/p>\n

\u5404\u4f4d\u770b\u5b98，\u5927\u5bb6\u65e9\u5b89\u5348\u5b89\u665a\u5b89\u5440~~~<\/span><\/p>\n

\u5982\u679c\u60a8\u89c9\u5f97\u8fd9\u7bc7\u6587\u7ae0\u5bf9\u60a8\u6709\u5e2e\u52a9\u7684\u8bdd<\/span><\/p>\n

\u6b22\u8fce\u60a8\u4e00\u952e\u4e09\u8fde，\u5c0f\u7f16\u5c3d\u5168\u529b\u505a\u5230\u66f4\u597d \u6b22\u8fce\u60a8\u5206\u4eab\u7ed9\u66f4\u591a\u4eba\u54e6 \"\"<\/span><\/span><\/p>\n

\u4eca\u5929\u6211\u4eec\u6765\u5b66\u4e60\u3010Java\u7f51\u7edc\u7f16\u7a0b\u3011-\u3010TCP\u3011\u4e09\u6b21\u6325\u624b，\u56db\u6b21\u6325\u624b\u8be6\u89e3–UDP\u548cTCP\u534f\u8bae\u8be6\u89e3<\/span><\/p>\n

\u76ee\u5f55<\/p>\n

1.UDP\u534f\u8bae<\/p>\n

1.1.UDP\u62a5\u6587\u957f\u5ea6<\/p>\n

1.2.\u6821\u9a8c\u548c<\/p>\n

1.2.1\u4ec0\u4e48\u662f\u6821\u9a8c\u548c，\u6821\u9a8c\u548c\u6709\u4ec0\u4e48\u7528？<\/p>\n

1.2.2.\u6821\u9a8c\u548c\u662f\u600e\u4e48\u8ba1\u7b97\u51fa\u6765\u7684？<\/p>\n

1.2.3：MD5<\/p>\n

1.3.\u57fa\u4e8eUDP\u5b9e\u73b0\u5e94\u7528\u5c42\u534f\u8bae<\/p>\n

2.TCP\u534f\u8bae<\/p>\n

2.1.TCP\u62a5\u6587\u683c\u5f0f<\/p>\n

2.2.TCP\u53ef\u9760\u4f20\u8f93（TCP\u6700\u5f00\u59cb\u7684\u6838\u5fc3）<\/p>\n

2.2.1.\u786e\u8ba4\u5e94\u7b54<\/p>\n

2.2.2.\u8d85\u65f6\u91cd\u4f20（\u4e09\u6b21\u95ee\u9898）<\/p>\n

2.2.3.\u8fde\u63a5\u7ba1\u7406（\u5efa\u7acb\u8fde\u63a5+\u65ad\u5f00\u8fde\u63a5）<\/p>\n

2.2.4.\u56db\u6b21\u6325\u624b<\/p>\n

2.3.\u63d0\u9ad8\u6548\u7387<\/p>\n

2.3.1.\u6ed1\u52a8\u7a97\u53e3<\/p>\n

2.3.2.\u6d41\u91cf\u63a7\u5236<\/p>\n

2.3.3.\u62e5\u585e\u63a7\u5236<\/p>\n

2.3.4.\u5ef6\u65f6\u5e94\u7b54<\/p>\n

2.3.5.\u634e\u5e26\u5e94\u7b54（\u5c31\u662f\u628a\u672c\u6765\u4e24\u4e2a\u6570\u636e\u6bb5\u4e00\u8d77\u8fd4\u56de\u4e86）<\/p>\n

2.4.\u7c98\u5305\u95ee\u9898<\/p>\n

2.5.\u5f02\u5e38\u7684\u5904\u7406\u60c5\u51b5<\/p>\n

2.5.1.\u8fdb\u7a0b\u5f02\u5e38\u7ed3\u675f<\/p>\n

\u200b\u7f16\u8f91<\/p>\n

2.5.2.\u901a\u4fe1\u76f4\u63a5\u65ad\u5f00\u4e86（\u8fdb\u7a0b\u90fd\u6ca1\u6765\u5f97\u53ca\u6740）（\u60f3\u56de\u5e94\u4f46\u662f\u56de\u5e94\u4e0d\u4e86）<\/p>\n

3.UDP\u548cTCP\u4e4b\u95f4\u7684\u5bf9\u6bd4<\/p>\n

\n

\u56fe\u89e3：（TIME_WAIT）\u7684\u4f5c\u7528\u4ee5\u53ca\u56db\u6b21\u6325\u624b\u7684\u56fe\u89e3<\/p>\n

\u5927\u54e5\u548c\u5c0f\u5f1f\u5728\u5fc3\u91cc（\u5144\u5f1f\u5728\u5fc3\u4e2d）<\/p>\n

\"\"<\/span><\/p>\n

\u9996\u5148\u6211\u4eec\u8981\u660e\u767d\u5b66\u4e60\u4e00\u4e2a\u534f\u8bae\u6700\u540e\u91cd\u8981\u7684\u5c31\u662f\u4e86\u89e3\u8fd9\u4e2a\u534f\u8bae\u7684\u62a5\u6587\u683c\u5f0f<\/p>\n<\/p>\n

\u534f\u8bae\u672c\u8eab\u5c31\u662f\u4e00\u4e2a\u7b80\u5355\u7684\u89c4\u5219<\/p>\n

\u6240\u8c13\u7684\u62a5\u6587\u683c\u5f0f\u5c31\u662f\u6309\u7167\u4e00\u5b9a\u7684\u683c\u5f0f\u8fdb\u884c\u5b57\u7b26\u4e32\u62fc\u63a5（\u5f53\u7136\u8fd9\u91cc\u662f\u4e8c\u8fdb\u5236\u62fc\u63a5）<\/p>\n

1.UDP\u534f\u8bae<\/h2>\n

UDP\u7684\u62a5\u6587\u683c\u5f0f\u6bd4TCP\u8fd8\u662f\u8981\u7b80\u5355\u4e0d\u5c11\u7684，\u56e0\u6b64\u6211\u4eec\u8981\u8bb2\u89e3\u7684\u70b9\u4e0d\u591a，\u4e3b\u8981\u662f\u4ee5\u4e0b\u4e24\u70b9：<\/p>\n

1.UDP\u62a5\u6587\u957f\u5ea6\u7684\u4e00\u4e9b\u95ee\u9898<\/p>\n

2.UDP\u6821\u9a8c\u548c<\/p>\n

\"\"<\/span><\/p>\n

1.1.UDP\u62a5\u6587\u957f\u5ea6<\/h3>\n

\u95ee\u9898\u4e00：<\/p>\n

\u5927\u5bb6\u53ef\u4ee5\u770b\u5230UDP\u62a5\u6587\u957f\u5ea6\u4e00\u5171\u5c3164kb，\u8fd9\u5bf9\u4e8e\u4ee5\u524d\u7684\u8ba1\u7b97\u673a\u8fd8\u4e0d\u9519，\u4f46\u662f\u5982\u4eca\u770b\u6765\u5c31\u5f88\u6349\u895f\u89c1\u8098\u4e86，\u6240\u4ee5\u80fd\u4e0d\u80fd\u628aUDP\u8fdb\u884c\u5347\u7ea7\u5904\u7406（\u62a5\u6587\u957f\u5ea6\u53d8\u957f）？<\/p>\n

\u5f53\u7136\u53ef\u4ee5！<\/p>\n

\u4f46\u662f\u4ee3\u4ef7\u662f\u5de8\u5927\u7684，\u5982\u679c\u8981\u5347\u7ea7，\u5c31\u8981\u901a\u4fe1\u53cc\u65b9\u90fd\u8981\u53bb\u5347\u7ea7（\u5168\u4e16\u754c\u90fd\u8981\u53bb\u5347\u7ea7，\u800c\u4e14UDP\u662f\u64cd\u4f5c\u7cfb\u7edf\u5185\u6838\u5b9e\u73b0\u7684，\u64cd\u4f5c\u7cfb\u7edf\u4e5f\u8981\u8fdb\u884c\u5347\u7ea7），\u6240\u4ee5\u8bf4\u6210\u672c\u592a\u5927\u7684\u6211\u4eec\u8fd8\u4e0d\u8003\u8651\u5347\u7ea7<\/p>\n

\u9664\u975e\u672a\u6765\u51fa\u73b0\u4e00\u4e2a\u65b0\u7684\u534f\u8bae\u628aUDP\u5b8c\u5168\u66ff\u4ee3\u6389\u3002<\/p>\n

\u95ee\u9898\u4e8c：<\/p>\n

\u8fd8\u6709\u7684\u4eba\u8bf4：\u65e2\u7136UDP\u4e0d\u80fd\u4e00\u6b21\u6027\u4f20\u8f93，\u80fd\u4e0d\u80fd\u628a\u6570\u636e\u8fdb\u884c\u62c6\u5305\u548c\u7ec4\u5305？<\/p>\n

\u7b54：<\/p>\n

\u8fd9\u4e2a\u65b9\u6848\u4e0d\u592a\u884c（\u5f00\u53d1\u6210\u672c\u592a\u5927），\u6211\u4eec\u5982\u4f55\u8fdb\u884c\u62c6\u5305，\u4e07\u4e00\u6570\u636e\u4e22\u5931\u4e86，\u6211\u4eec\u518d\u8fdb\u884c\u5982\u4f55\u6821\u9a8c，\u53c8\u5982\u4f55\u7ec4\u5305？\u8fd9\u91cc\u9762\u6709\u5f88\u5927\u7684\u5f00\u53d1\u548c\u6d4b\u8bd5\u6210\u672c！！！<\/p>\n

\u4f46\u662fTCP\u5c31\u53ef\u4ee5\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898（\u4e0d\u8fc7\u5e26\u6765\u7684\u662f\u6027\u80fd\u7684\u4e0b\u964d）<\/p>\n

1.2.\u6821\u9a8c\u548c<\/h3>\n

1.2.1\u4ec0\u4e48\u662f\u6821\u9a8c\u548c，\u6821\u9a8c\u548c\u6709\u4ec0\u4e48\u7528？<\/h4>\n

\u7f51\u7edc\u901a\u4fe1\u4e2d，\u5f80\u5f80\u90fd\u4f1a\u56e0\u4e3a\u4e00\u4e9b\u4fe1\u53f7\u5e72\u6270\u7684\u56e0\u7d20，\u5bfc\u81f4\u6211\u4eec\u4f20\u8f93\u7684\u6570\u636e\u51fa\u73b0\u95ee\u9898，\u8fd9\u4e2a\u5c31\u9700\u8981\u6821\u9a8c\u548c\u5e2e\u52a9\u6211\u4eec\u68c0\u67e5\u4e00\u4e0b\u6570\u636e\u7684\u6b63\u786e\u5b8c\u6574\u6027~<\/p>\n

\u9996\u5148\u6211\u7ed9\u5927\u5bb6\u7684\u4f8b\u5b50：<\/p>\n

\u6211\u7ed9\u5c0f\u660e\u8bf4\u4e00\u4e2a\u6211\u7684\u6e38\u620f\u8d26\u6237\u5bc6\u7801（\u5f88\u957f），\u6211\u5c31\u5ff5\u7ed9\u4ed6\u542c\u4e86，\u4ed6\u8bf4\u8bb0\u5230\u7eb8\u4e0a\u4e86<\/p>\n

\u7136\u540e\u4ed6\u758f\u5ffd\u4e86\u5c11\u5199\u4e86\u4e00\u4e2a\u5b57\u6bcd，\u8fd9\u4e2a\u65f6\u5019\u5c31\u5f88\u5c34\u5c2c（\u4ed6\u56de\u5bb6\u4e86\u767b\u5f55\u4e0d\u4e0a\u6e38\u620f\u4e86）<\/p>\n

\u52a0\u4e00\u4e2a\u6821\u9a8c\u548c~<\/p>\n

\u4f46\u662f\u5982\u679c\u6211\u8ddf\u4ed6\u8bf4\u4e00\u4e2a20\u4e2a\u5b57\u6bcd，\u4ed6\u5c31\u53ef\u4ee5\u68c0\u67e5\u5230\u4ed6\u53ea\u5199\u4e8619\u4e2a\u5b57\u6bcd，\u5f53\u65f6\u5c31\u77e5\u9053\u9519\u8bef\u4e86<\/p>\n

\u8fd9\u4e2a\u6821\u9a8c\u548c\u5c31\u53ef\u4ee5\u8d77\u5230\u68c0\u67e5\u6570\u636e\u662f\u5426\u6b63\u786e\u7684\u4f5c\u7528~~<\/p>\n

\u5177\u4f53\u89e3\u91ca：<\/p>\n

\"\"<\/span><\/p>\n

1.2.2.\u6821\u9a8c\u548c\u662f\u600e\u4e48\u8ba1\u7b97\u51fa\u6765\u7684？<\/h4>\n

\u8ba1\u7b97\u6821\u9a8c\u548c\u6709\u5f88\u591a\u7b97\u6cd5，\u8fd9\u91ccUDP\u4f7f\u7528\u7684\u7b97\u6cd5\u662fCRC\u7b97\u6cd5（\u5faa\u73af\u5197\u4f59\u7b97\u6cd5）<\/p>\n

\u89e3\u91ca：<\/p>\n

\u628a\u5f53\u524d\u8981\u8ba1\u7b97\u6821\u9a8c\u548c\u7684\u6570\u636e\u7684\u6bcf\u4e00\u4e2a\u5b57\u8282\u90fd\u8fdb\u884c\u7d2f\u52a0，\u628a\u8fd9\u4e2a\u7ed3\u679c\u4fdd\u5b58\u5230\u6821\u9a8c\u548c\u4e2d（\u6821\u9a8c\u548c\u4e00\u5171\u4e24\u4e2a\u5b57\u8282），\u5c31\u7b97\u6ea2\u51fa\u4e5f\u6ca1\u5173\u7cfb\u3002<\/p>\n<\/p>\n

\u4f46\u662f\u8fd9\u4e2aCRC\u7b97\u6cd5\u4e0d\u662f\u5f88\u9760\u8c31，\u5bfc\u81f4\u4e24\u4e2a\u4e0d\u540c\u7684\u6570\u636e\u5f97\u5230\u4e00\u6837\u7684CRC\u6821\u9a8c\u548c\u7684\u6982\u7387\u4e0d\u5c0f<\/p>\n

\u5c31\u8b6c\u5982\u524d\u4e00\u4e2a\u5b57\u8282\u5c111，\u540e\u4e00\u4e2a\u5b57\u8282\u591a1（\u6709\u4e0d\u5c0f\u7684\u6982\u7387\u51fa\u73b0）<\/p>\n

1.2.3：MD5<\/h4>\n

\u8981\u8ba1\u7b97\u6821\u9a8c\u548cMD5\u5c31\u662f\u4e00\u4e2a\u5f88\u597d\u7684\u7b97\u6cd5（\u548c\u4ed6\u7c7b\u4f3c\u7684\u8fd8\u6709sha1\u7b97\u6cd5）<\/p>\n

sojson\u5de5\u5177（\u5305\u542bmd5\u52a0\u5bc6\u5de5\u5177）<\/span><\/p>\n

\u6211\u4eec\u8bb2\u89e3\u4e00\u4e0bMD5\u7684\u7279\u6027<\/p>\n

  • \u5b9a\u957f：\u65e0\u8bba\u4f60\u539f\u59cb\u6570\u636e\u591a\u957f，\u8ba1\u7b97\u51fa\u6765\u7684md5\u90fd\u662f\u56fa\u5b9a\u957f\u5ea6（\u8fd9\u4e00\u70b9\u5c31\u5f88\u597d，\u6bd5\u7adf\u6821\u9a8c\u548c\u672c\u8eab\u5c31\u4e0d\u5e94\u8be5\u5f88\u957f）<\/li>\n
  • \u5206\u6563：\u4e24\u4e2a\u539f\u59cb\u6570\u636e\u5f88\u63a5\u8fd1\u7684\u6570\u636e，\u53ea\u8981\u4e00\u4e2a\u5b57\u8282\u4e0d\u540c，md5\u8ba1\u7b97\u51fa\u6765\u7684\u503c\u4e5f\u4f1a\u5dee\u8ddd\u5f88\u5927\u00a0 \u00a0 \u00a0（\u56e0\u6b64MD5\u4e5f\u5f88\u9002\u5408\u505ahash\u7b97\u6cd5，\u628a\u4e00\u4e2a\u51e0\u4e4e\u76f8\u540c\u7684key\u5c3d\u91cf\u505a\u5230\u5206\u6563，\u964d\u4f4ehash\u51b2\u7a81）<\/li>\n
  • \u4e0d\u53ef\u9006：\u7ed9\u4e00\u4e2a\u539f\u59cb\u6570\u636e\u8ba1\u7b97\u51faMD5\u5f88\u5bb9\u6613，\u4f46\u662f\u53cd\u8fc7\u6765\u6781\u5176\u56f0\u96be（\u7406\u8bba\u4e0a\u662f\u4e0d\u53ef\u884c\u7684）<\/li>\n

    1.3.\u57fa\u4e8eUDP\u5b9e\u73b0\u5e94\u7528\u5c42\u534f\u8bae<\/h4>\n

    NFS：\u7f51\u7edc\u6587\u4ef6\u7cfb\u7edf<\/p>\n

    TFTP：\u7b80\u5355\u6587\u4ef6\u4f20\u8f93\u534f\u8bae<\/p>\n

    DHCP：\u52a8\u6001\u4e3b\u673a\u914d\u7f6e\u534f\u8bae<\/p>\n

    BOOTP：\u542f\u52a8\u534f\u8bae（\u7528\u4e8e\u65e0\u76d8\u8bbe\u5907\u542f\u52a8）<\/p>\n

    DNS：\u57df\u540d\u89e3\u6790\u534f\u8bae（\u540e\u9762\u6211\u4eec\u4f1a\u8bb2\u89e3\u8fd9\u4e2a）<\/p>\n

    \u5f53\u7136，\u4e5f\u5305\u62ec\u4f60\u81ea\u5df1\u5199UDP\u7a0b\u5e8f\u65f6\u81ea\u5b9a\u4e49\u7684\u5e94\u7528\u5c42\u534f\u8bae<\/p>\n

    2.TCP\u534f\u8bae<\/h2>\n

    TCP\u76f8\u5173\u7279\u6027<\/p>\n

    1.\u6709\u8fde\u63a5 Socket clientScoket\u00a0 = serverSocket.accept();<\/p>\n

    \u7528\u8fc7ServerSocket api\u7684accept\u65b9\u6cd5\u628a\u5185\u6838\u91cc\u5df2\u7ecf\u5efa\u7acb\u597d\u7684\u8fde\u63a5\u62ff\u8fc7\u6765（\u901a\u8fc7\u4e09\u6b21\u63e1\u624b\u5efa\u7acb\u7684\u8fde\u63a5）<\/p>\n

    2.\u53ef\u9760\u4f20\u8f93（\u6211\u4eec\u63a5\u4e0b\u4fe9\u8981\u8bb2\u8ff0\u7684\u91cd\u70b9）<\/p>\n

    3.\u9762\u5411\u5b57\u8282\u6d41（\u6211\u4eec\u901a\u8fc7\u5b57\u8282\u6d41 \u8bfb\/\u5199 \u7f51\u5361\u62bd\u8c61\u6210\u6587\u4ef6\u91cc\u9762\u7684\u6570\u636e）<\/p>\n

    4.\u5168\u53cc\u5de5（\u53ef\u4ee5\u540c\u65f6\u4e92\u76f8\u53d1\u9001\u6d88\u606f）<\/p>\n<\/p>\n

    2.1.TCP\u62a5\u6587\u683c\u5f0f<\/h3>\n

    \u56fe\u89e3：（\u6ca1\u8bb2\u5230\u7684\u540e\u7eed\u4f1a\u8fdb\u884c\u8bb2\u89e3）<\/p>\n

    \"\"<\/span>\u200b<\/p>\n

    2.2.TCP\u53ef\u9760\u4f20\u8f93（TCP\u6700\u5f00\u59cb\u7684\u6838\u5fc3）<\/h3>\n

    \u89e3\u91ca：（\u5f97\u77e5\u9053\u5bf9\u65b9\u6536\u6ca1\u6536\u5230\u6d88\u606f，\u5982\u679c\u5bf9\u65b9\u4e00\u76f4\u6ca1\u56de\u5e94，\u5c31\u8fdb\u884c\u8865\u6551）<\/p>\n

    \"\"<\/span>\u200b<\/p>\n

    \u56e0\u6b64\u4e3a\u4e86\u4fdd\u8bc1\u53ef\u9760\u4f20\u8f93\u6211\u4eec\u5f15\u5165\u5982\u4e0b3\u4e2a\u673a\u5236<\/p>\n

    1.\u786e\u8ba4\u5e94\u7b54<\/p>\n

    2.\u8d85\u65f6\u91cd\u4f20<\/p>\n

    3.\u8fde\u63a5\u7ba1\u7406（\u4e09\u6b21\u63e1\u624b，\u56db\u6b21\u6325\u624b）<\/p>\n

    2.2.1.\u786e\u8ba4\u5e94\u7b54<\/h4>\n

    \u786e\u8ba4\u5e94\u7b54：\u987e\u540d\u601d\u4e49，\u63a5\u6536\u65b9\u4f1a\u53d1\u9001\u65b9\u8fd4\u56de\u4e00\u4e2a\u5e94\u7b54\u62a5\u6587（acknowledge ，ack）<\/p>\n

    \u5982\u679c\u53d1\u9001\u65b9\u6536\u5230\u8fd9\u4e2a\u5e94\u7b54\u62a5\u6587\u4e86，\u5c31\u77e5\u9053\u81ea\u5df1\u7684\u6570\u636e\u5df2\u7ecf\u53d1\u9001\u6210\u529f\u4e86\u3002<\/p>\n

    \u4f46\u662f，\u7f51\u7edc\u4e0a\u4e0d\u7a33\u5b9a\u7684\u60c5\u51b5\u53ef\u80fd\u4f1a\u5bfc\u81f4\u6211\u4eec\u7684\u6570\u636e\u51fa\u73b0\u201c\u540e\u53d1\u5148\u81f3\u201d\u7684\u60c5\u51b5<\/p>\n

    \"\"<\/span>\u200b<\/p>\n

    \u6240\u4ee5TCP\u5c06\u6bcf\u4e2a\u5b57\u8282\u7684\u6570\u636e\u90fd\u8fdb\u884c\u4e86\u7f16\u53f7\u2014\u2014\u5373\u4e3a\u5e8f\u5217\u53f7<\/p>\n

    \"\"<\/span>\u200b<\/p>\n

    \u89e3\u91ca：（\u540e\u9762\u6211\u4eec\u8bb2\u8ff0\u5230\u6ed1\u52a8\u7a97\u53e3\u7684\u65f6\u5019\u6211\u4eec\u8fd8\u4f1a\u8bb2\u89e3\u5230）<\/p>\n

    \u6709\u4e86\u5e8f\u53f7，\u6211\u4eec\u53ea\u9700\u8981\u786e\u8ba4\u56de\u590d\u7ed9\u53d1\u9001\u65b9\u6700\u540e\u4e00\u4e2a\u6570\u636e（\u53d1\u9001\u65b9\u5c31\u53ef\u4ee5\u786e\u5b9a\u5176\u4ed6\u6570\u636e\u90fd\u6765\u4e86），\u56e0\u4e3a\u5982\u679c\u6570\u636e\u6ca1\u5168\u6765\u7684\u8bdd，\u6211\u4eec\u662f\u4e0d\u4f1a\u7ed9\u53d1\u9001\u65b9\u53d1\u90011001\u7684<\/p>\n

    \u5982\u4f55\u533a\u5206\u4e00\u4e2a\u6570\u636e\u5305\u662f\u4e00\u4e2a\u666e\u901a\u7684\u6570\u636e\u8fd8\u662fack\u5e94\u7b54\u62a5\u6587\u6570\u636e\u5462？<\/p>\n

    \"\"<\/span>\u200b<\/p>\n

    TCP\u7684\u53ef\u9760\u4f20\u8f93：<\/p>\n

    \u786e\u8ba4\u5e94\u7b54 \u662fTCP\u6700\u6838\u5fc3\u7684\u673a\u5236，\u518d\u501f\u52a9\u5176\u4ed6\u673a\u5236\u8f85\u52a9\u6700\u7ec8\u5b8c\u6210\u53ef\u9760\u4f20\u8f93<\/p>\n

    2.2.2.\u8d85\u65f6\u91cd\u4f20（\u56db\u4e2a\u95ee\u9898）<\/h4>\n

    \u6211\u4eec\u662f\u53ef\u4ee5\u8fdb\u884c\u901a\u8fc7\u786e\u8ba4\u5e94\u7b54\u6765\u4fdd\u8bc1\u6211\u4eec\u7684\u6570\u636e\u4f20\u8f93\u5230\u4e86<\/p>\n

    \u7b2c\u4e00\u4e2a\u95ee\u9898：\u4f46\u662f\u5982\u679c\u6211\u4eec\u7684\u6570\u636e\u5305\u90fd\u4e22\u4e86，\u600e\u4e48\u5e94\u7b54\u5462？<\/p>\n

    （\u7f51\u7edc\u4e0a\u4e5f\u4f1a\u51fa\u73b0\u201c\u5835\u8f66\u201d\u7684\u95ee\u9898：\u5982\u679c\u6570\u636e\u5305\u592a\u591a，\u5c31\u4f1a\u5728\u8def\u7531\u5668\/\u4ea4\u6362\u673a\u4e0a\u51fa\u73b0\u5835\u8f66，\u4f46\u662f\u8def\u7531\u5668\u9488\u5bf9\u201c\u5835\u8f66\u201d\u7684\u5904\u7406\u4f1a\u6bd4\u8f83\u9664\u66b4，\u5b83\u4e0d\u4f1a\u628a\u79ef\u538b\u7684\u6570\u636e\u4fdd\u5b58\u597d，\u800c\u662f\u628a\u8fd9\u4e9b\u4e2d\u7684\u5927\u90e8\u5206\u6570\u636e\u90fd\u4e22\u8c03）<\/p>\n

    \u7b54：<\/p>\n

    \u5176\u5b9e\u4e00\u76f4\u4e0d\u5e94\u7b54\u4e5f\u662f\u4e00\u79cd\u5e94\u7b54（\u7ed9\u5973\u795e\u53d1\u6d88\u606f\u5973\u795e\u4e00\u76f4\u4e0d\u56de\u4e5f\u662f\u4e00\u79cd\u5e94\u7b54）\u54c8\u54c8\u54c8\u54c8<\/p>\n

    \u8fd9\u4e2a\u65f6\u5019\u6211\u4eec\u5c31\u9700\u8981\u8fdb\u884c\u91cd\u65b0\u4f20\u8f93\u4e86\u2014\u2014\u8d85\u65f6\u91cd\u4f20<\/p>\n

    \u6211\u4eec\u80af\u5b9a\u662f\u7b49\u5f85\u4e86\u4e00\u4f1a\u53d1\u73b0\u63a5\u6536\u65b9\u8fd8\u4e00\u76f4\u4e0d\u7ed9\u6211\u4eec\u8fd4\u56deack（\u6216\u8005\u5df2\u7ecf\u8fd4\u56de\u4e86ack\u6211\u4eec\u6ca1\u6709\u6536\u5230）\u8fd9\u4e24\u79cd\u60c5\u51b5\u90fd\u662f\u8ba4\u4e3a\u5bf9\u65b9\u6ca1\u6709\u6536\u5230，\u6211\u4eec\u5c31\u8981\u8d85\u65f6\u91cd\u4f20\u7684\u529f\u80fd\u4e86！！！<\/p>\n

    \u518d\u6765\u4e00\u4e2a\u95ee\u9898：<\/p>\n

    \u5982\u679c\u662f\u5bf9\u65b9\u5df2\u7ecf\u6536\u5230\u8fd9\u4e2a\u6570\u636e\u8fd8\u8fd4\u56de\u4e86ack，\u53ea\u662f\u6211\u4eec\u6ca1\u6709\u6536\u5230，\u8fd9\u4e2a\u65f6\u5019\u53d1\u9001\u7684\u6570\u636e\u4e0d\u5c31\u4f1a\u91cd\u590d\u4e86\u5417？<\/p>\n

    \u7b54：<\/p>\n

    TCP\u91cc\u9762\u4f1a\u6709\u4e00\u4e2a\u201c\u63a5\u6536\u7f13\u51b2\u533a\u201d\u5c31\u662f\u4e00\u4e2a\u5185\u5b58\u7a7a\u95f4，\u4fdd\u5b58\u5f53\u524d\u5df2\u7ecf\u63a5\u6536\u5230\u7684\u6570\u636e，\u4ee5\u53ca\u6570\u636e\u7684\u5e8f\u53f7\u3002<\/p>\n

    \u5982\u679c\u63a5\u6536\u65b9\u53d1\u73b0，\u5f53\u524d\u53d1\u9001\u7684\u6570\u636e\u662f\u518d\u63a5\u6536\u7f13\u51b2\u533a\u5b58\u5728\u7684\u6570\u636e，\u5c31\u4f1a\u628a\u8fd9\u4e2a\u6570\u636e\u4e22\u5f03\u6389，\u786e\u4fdd\u6211\u4eec\u5e94\u7528\u7a0b\u5e8f\u8fdb\u884cread\u7684\u65f6\u5019\u63a5\u53d7\u5230\u7684\u53ea\u662f\u4e00\u6761\u6570\u636e<\/p>\n

    \u56fe\u89e3\"\"<\/span>\u200b<\/p>\n

    \u7b2c\u4e09\u4e2a\u95ee\u9898：\u53d1\u9001\u65b9\u4f55\u65f6\u8fdb\u884c\u91cd\u4f20？\u7b49\u5f85\u65f6\u95f4？<\/p>\n

    1.\u8fd9\u4e2a\u7b49\u5f85\u65f6\u95f4\u662f\u53ef\u4ee5\u8fdb\u884c\u914d\u7f6e\u7684，\u4e0d\u540c\u7684\u7cfb\u7edf\u4e0a\u9762\u4e0d\u540c，\u4e5f\u53ef\u4ee5\u4fee\u6539\u4e00\u4e9b\u5185\u6838\u53c2\u6570\u6765\u5f15\u8d77\u8fd9\u91cc\u7684\u65f6\u95f4\u53d8\u5316<\/p>\n

    2.\u7b49\u5f85\u7684\u65f6\u95f4\u4e5f\u4f1a\u52a8\u6001\u53d8\u5316，\u6ca1\u591a\u7ecf\u5386\u4e00\u6b21\u8d85\u65f6，\u7b49\u5f85\u7684\u65f6\u95f4\u90fd\u4f1a\u53d8\u957f（\u4f46\u662f\u4e5f\u4e0d\u4f1a\u65e0\u9650\u62c9\u957f，\u5982\u679c\u65f6\u95f4\u957f\u5230\u4e00\u5b9a\u7a0b\u5ea6，\u5c31\u4f1a\u653e\u5f03TCP\u8fde\u63a5（\u89e6\u53d1TCP\u91cd\u65b0\u8fde\u63a5\u64cd\u4f5c））<\/p>\n

    \u7b2c\u56db\u4e2a\u95ee\u9898：\u90a3\u8fd9\u6837TCP\u7684\u53ef\u9760\u6027\u4e0d\u5c31\u4f1a\u5bfc\u81f4\u6027\u80fd\u7684\u4e0b\u964d\u4e86\u5417？<\/p>\n

    \u5f53\u7136\u2014\u2014\u7b49\u4ef7\u4ea4\u6362\u662f\u70bc\u91d1\u672f\u4e0d\u53d8\u7684\u539f\u5219<\/p>\n

    \u4f20\u8f93\u6548\u7387\u4e0b\u964d，\u590d\u6742\u7a0b\u5ea6\u53d8\u9ad8<\/p>\n

    \u4f20\u8f93\u5c42\u7684\u534f\u8bae\u4e3b\u8981\u662fTCP\u548cUDP\u4f46\u662f\u8fd8\u662f\u6709\u522b\u7684\u534f\u8bae\u53ef\u4ee5\u505a\u5230TCP\u548cUDP\u4e4b\u95f4\u7684\u6548\u679c\u7684<\/p>\n

    \u8b6c\u5982（quic\u2026\u2026）<\/p>\n

    2.2.3.\u8fde\u63a5\u7ba1\u7406（\u5efa\u7acb\u8fde\u63a5+\u65ad\u5f00\u8fde\u63a5）<\/h4>\n

    \u4e09\u6b21\u63e1\u624b\u548c\u56db\u6b21\u6325\u624b\u7ec8\u4e8e\u8981\u6765\u5566~~~<\/p>\n

    \u63e1\u624b\u5176\u5b9e\u5c31\u662f\u6253\u4e2a\u62db\u547c<\/p>\n

    TCP\u7684\u4e09\u6b21\u63e1\u624b：TCP\u5728\u5efa\u7acb\u8fde\u63a5\u7684\u8fc7\u7a0b\u4e2d，\u9700\u8981\u901a\u4fe1\u53cc\u65b9\u4e00\u5171\u201c\u6253\u4e09\u6b21\u62db\u547c\u201d\u624d\u80fd\u591f\u5efa\u7acb<\/p>\n

    A\u5148\u7ed9B\u53d1\u9001\u4e00\u4e2a\u201c\u540c\u6b65\u62a5\u6587\u6bb5\u201d（\u6ca1\u6709\u6570\u636e\u7684\u5e94\u7528\u5c42\u6570\u636e\u5305，\u6ca1\u6709\u8f7d\u8377）（\u6807\u5fd7\u4f4d\u4e3aSYN\u4e3a1\u7684\u65f6\u5019\u8fd9\u4e2a\u8fd9\u4e2a\u62a5\u6587\u5c31\u662f\u4e00\u4e2a\u540c\u6b65\u62a5\u6587\u6bb5）<\/p>\n

    \u7136\u540eB\u7ed9A\u56de\u590d\u4e00\u4e2aack（\u8fd9\u4e2a\u65f6\u5019\u53ea\u6709A\u80fd\u786e\u5b9a\u5b83\u53d1\u9001\u8fc7\u53bb\u7684\u6570\u636e\u80fd\u9001\u5230，\u4f46\u662fB\u4e0d\u77e5\u9053B\u53d1\u9001\u7684\u6570\u636e\u62a5\u662f\u4ec0\u4e48\u60c5\u51b5，\u6240\u4ee5B\u4e5f\u8981\u7ed9A\u53d1\u9001\u4e00\u4e2a\u201c\u540c\u6b65\u62a5\u6587\u6bb5\u201d\u5982\u679cA\u4e5f\u80fd\u7ed9B\u7684\u53d1\u9001\u4e00\u4e2a\u540c\u6b65\u62a5\u6587\u6bb5，\u90a3\u4e48A\u5c31\u77e5\u9053\u81ea\u5df1\u6ca1\u95ee\u9898\u4e86）<\/p>\n

    \u6240\u4ee5\u60c5\u51b5\u5982\u4e0b<\/p>\n

    \"\"<\/span>\u200b<\/p>\n<\/p>\n

    \u8fd9\u4e2a\u65f6\u5019A\u548cB\u5c31\u8bb0\u5f55\u4e86\u5bf9\u65b9\u7684\u4fe1\u606f，\u5c31\u6784\u6210\u4e86\u903b\u8f91\u4e0a\u7684\u201c\u8fde\u63a5\u201d<\/p>\n

    \u5efa\u7acb\u8fde\u63a5\u7684\u8fc7\u7a0b\u5c31\u662f\u901a\u4fe1\u53cc\u65b9\u90fd\u7ed9\u5bf9\u65b9\u53d1\u8d77syn，\u4e5f\u90fd\u8981\u7ed9\u5bf9\u65b9\u53cd\u9988ack（\u672c\u6765\u662f\u56db\u6b21\u63e1\u624b，\u4f46\u662f\u4e2d\u95f4\u4e24\u6b21\u6070\u597d\u53ef\u4ee5\u5408\u5e76\u6210\u4e00\u6b21）<\/p>\n

    \u4e09\u6b21\u63e1\u624b\u7684\u4f5c\u7528（\u5c31\u662f\u5efa\u7acb\u8fde\u63a5\u7684\u4f5c\u7528）？<\/p>\n

    1.\u5efa\u7acb\u8fde\u63a5\u80af\u5b9a\u662f\u786e\u4fdd\u7f51\u7edc\u901a\u4fe1\u662f\u5426\u7545\u901a<\/p>\n<\/p>\n

    2.\u8ba9\u53d1\u9001\u65b9\u548c\u63a5\u53d7\u65b9\u786e\u8ba4\u81ea\u5df1\u53d1\u9001\u80fd\u529b\u548c\u63a5\u6536\u80fd\u529b\u662f\u5426\u6b63\u5e38<\/p>\n

    （\u5982\u679cB\u4e0d\u7ed9A\u53d1\u9001syn，A\u5c31\u4e0d\u4f1a\u56de\u5e94\u3002B\u4e5f\u4e0d\u77e5\u9053\u81ea\u5df1\u7684ackA\u6536\u5230\u6ca1\u6709，\u5982\u679cA\u56de\u5e94\u4e86ack\u5e76\u4e14B\u6536\u5230\u4e86，B\u5c31\u80fd\u786e\u5b9a\u81ea\u5df1\u7684\u53d1\u9001\u80fd\u529b\u548c\u63a5\u53d7\u80fd\u529b\u90fd\u662f\u6b63\u5e38\u7684）<\/p>\n<\/p>\n

    3.\u8ba9\u901a\u4fe1\u53cc\u65b9\u5bf9\u4e8e\u4e00\u4e9b\u91cd\u8981\u7684\u53c2\u6570\u8fdb\u884c\u534f\u5546<\/p>\n

    \u8b6c\u5982：<\/p>\n

    （1）\u8d85\u65f6\u91cd\u4f20\u65f6\u95f4<\/p>\n

    （2）\u5e8f\u5217\u53f7（\u5e8f\u5217\u53f7\u786e\u4fdd\u6570\u636e\u4f20\u8f93\u7684\u987a\u5e8f\u3002\u5728 TCP \u901a\u4fe1\u4e2d，\u53d1\u9001\u65b9\u5c06\u6570\u636e\u5206\u6210\u591a\u4e2a\u6570\u636e\u5305，\u5e76\u4e3a\u6bcf\u4e2a\u6570\u636e\u5305\u5206\u914d\u4e00\u4e2a\u552f\u4e00\u7684\u5e8f\u5217\u53f7（\u5177\u4f53\u4ece\u90a3\u4e2a\u6570\u5b57\u5f00\u59cb\u4e5f\u662f\u9700\u8981\u534f\u5546\u7684\u4e0d\u662f\u62cd\u8111\u74dc\u5b50））<\/p>\n

    （3）\u7a97\u53e3\u5927\u5c0f（\u6211\u4eec\u7b49\u4f1a\u6ed1\u52a8\u7a97\u53e3\u4f1a\u8bb2\u89e3）<\/p>\n

    \u2026\u2026\u2026\u2026<\/p>\n

    \u7ed9\u5927\u5bb6\u4e00\u4e2a\u5177\u4f53\u7684\u4f8b\u5b50（\u8fd9\u5c31\u534f\u5546\u51fa\u6765\u6309\u716765w\u8fdb\u884c\u5145\u7535）<\/p>\n

    \"\"<\/span>\u200b<\/p>\n

    2.2.4.\u56db\u6b21\u6325\u624b<\/h4>\n

    \u63a5\u4e0b\u6765\u6211\u5e26\u5927\u5bb6\u770b\u4e00\u4e0b\u4e00\u5f20\u5b8c\u6574\u7684TCP\u72b6\u6001\u8f6c\u6362\u56fe<\/p>\n

    \"\"<\/span>\u200b<\/p>\n

    \u5efa\u7acb\u8fde\u63a5\u662f\u5ba2\u6237\u7aef\u4e3b\u52a8\u53d1\u8d77\u7684<\/p>\n

    \u4f46\u662f\u65ad\u5f00\u8fde\u63a5\u5ba2\u6237\u7aef\u548c\u670d\u52a1\u5668\u90fd\u53ef\u4ee5\u4e3b\u52a8\u53d1\u8d77<\/p>\n

    FIN：\u7ed3\u675f\u62a5\u6587\u6bb5（\u5c31\u50cf\u5efa\u7acb\u8fde\u63a5\u7684SYN（\u540c\u6b65\u62a5\u6587\u6bb5）\u90fd\u662f\u4e00\u4e2a\u6807\u5fd7\u4f4d）<\/p>\n

    \"\"<\/span>\u200b<\/p>\n

    \u95ee\u9898\u4e00：\u95ee\u4ec0\u4e48\u662f\u56db\u6b21\u6325\u624b\u800c\u4e0d\u662f\u4e09\u6b21\u6325\u624b？（\u4e09\u6b21\u6325\u624b\u5728\u5ef6\u65f6\u5e94\u7b54\u7684\u60c5\u51b5\u4e0b\u4e5f\u53ef\u4ee5\u5b9e\u73b0）<\/p>\n

    \"\"<\/span>\u200b<\/p>\n

    \u95ee\u9898\u4e8c：\u5c0f\u7f16\u4e00\u5f00\u59cb\u5b66\u7684\u65f6\u5019\u5c31\u60f3\u7740（\u4f60\u90fd\u8981\u7ed3\u675f\u4e86\u8fd8\u641e\u8fd9\u4e48\u6b63\u5f0f\u5e72\u561b？）<\/p>\n

    \u76f4\u63a5\u4e24\u6b21\u6325\u624b\u4e0d\u5c31\u5f97\u4e86？<\/p>\n

    \"\"<\/span>\u200b<\/p>\n

    \u4f46\u662f\u6211\u5c11\u8003\u8651\u4e86\u5f88\u591a<\/p>\n

    \u89e3\u91ca，\u5f88\u91cd\u8981！<\/p>\n

    \u670d\u52a1\u5668\u8fd8\u8981\u5904\u7406\u6570\u636e，\u53ef\u80fd\u8fd8\u8981\u7ed9\u5ba2\u6237\u7aef\u54cd\u5e94\u5176\u4ed6\u7684\u6570\u636e（\u5ba2\u6237\u7aef\u8fd9\u4e2a\u65f6\u5019\u8fd8\u4e0d\u80fd\u5173\u95ed）<\/p>\n<\/p>\n

    \u7b49\u5230\u670d\u52a1\u5668\u53d1\u9001FIN\u7684\u65f6\u5019\u624d\u80fd\u8bc1\u660e\u6570\u636e\u5df2\u7ecf\u5904\u7406\u5b8c\u6bd5\u4e86（\u8fd9\u4e2a\u65f6\u5019\u5c31\u662f\u4e09\u6b21\u63e1\u624b\u4e86）\u3002\u4f46\u662f\u670d\u52a1\u5668\u8fd8\u4e0d\u80fd\u5173\u95ed，\u4e07\u4e00\u5ba2\u6237\u7aef\u6ca1\u6536\u5230FIN（\u5ba2\u6237\u7aef\u6ca1\u6536\u5230FIN\u65f6\u4e0d\u80fd\u5173\u95ed\u56e0\u4e3a\u670d\u52a1\u5668\u53ef\u80fd\u8fd8\u6709\u6570\u636e\u8981\u901a\u4fe1），\u670d\u52a1\u5668\u8fd8\u8981\u91cd\u4f20\u3002\u6240\u4ee5\u670d\u52a1\u5668\u8fd8\u8981\u7b49\u5f85\u5ba2\u6237\u7aef\u8fd4\u56deack\u624d\u80fd\u7ed3\u675f\u3002（\u8fd9\u91cc\u5c31\u662f\u56db\u6b21\u63e1\u624b\u4e86）<\/p>\n

    \u56fe\u89e3：（TIME_WAIT）\u7684\u4f5c\u7528\u4ee5\u53ca\u56db\u6b21\u6325\u624b\u7684\u56fe\u89e3<\/p>\n

    TIME_WAIT\u4f5c\u7528：\u9632\u6b62\u6700\u540e\u4e00\u4e2aack\u8d70\u4e22（\u5c0f\u5f1f\u62c5\u5fc3\u5927\u54e5\u53c8\u591a\u7b49\u5f85\u4e86\u4e00\u4f1a）<\/p>\n

    \"\"<\/span>\u200b<\/p>\n

    \u6211\u4eec\u4e0a\u8ff0\u7684\u673a\u5236\u90fd\u662f\u5728\u4e3a\u53ef\u9760\u4f20\u8f93\u6548\u529b，\u4f46\u662f\u53ef\u9760\u4f20\u8f93\u4e0b\u6765，\u727a\u7272\u7684\u5374\u662f\u6548\u7387<\/p>\n

    \u90a3\u6211\u4eec\u600e\u4e48\u6765\u63d0\u9ad8\u6548\u7387\u5462？\u63a5\u4e0b\u6765\u6211\u5e26\u9886\u5927\u5bb6\u5b66\u4e60\u4ee5\u4e0b\u51e0\u4e2a\u673a\u5236~<\/p>\n

    2.3.\u63d0\u9ad8\u6548\u7387<\/h3>\n

    \u63a5\u4e0b\u6765\u7ed9\u5927\u5bb6\u770b\u4e00\u4e0b\u6211\u7684\u603b\u7ed3\u601d\u8def：<\/p>\n

    \"\"<\/span>\u200b<\/p>\n

    2.3.1.\u6ed1\u52a8\u7a97\u53e3<\/h4>\n

    \"\"<\/span>\u200b<\/p>\n

    \u53d8\u6210\u8fd9\u6837~~~<\/p>\n

    \"\"<\/span>\u200b<\/p>\n

    \u7136\u540e\u8fdb\u884c\u201c\u6ed1\u52a8\u201d\u7a97\u53e3（\u53ea\u8981\u6709ack\u56de\u6765\u5c31\u7ee7\u7eed\u53d1）<\/p>\n

    \"\"<\/span>\u200b<\/p>\n

    \u4f46\u662f\u51fa\u73b0\u4e86\u4e22\u5305\u7684\u60c5\u51b5\u8be5\u5982\u4f55\u5462？<\/p>\n

    \u5206\u4e3a\u4e24\u79cd\u60c5\u51b5~<\/p>\n

    \u7b2c\u4e00\u79cd\u60c5\u51b5：<\/p>\n

    \"\"<\/span>\u200b<\/p>\n

    \u5c31\u50cf\u522b\u4eba\u95ee\u4f60\u4e0a\u521d\u4e2d\u4e86\u6ca1\u6709，\u4f60\u76f4\u63a5\u8bf4\u6211\u5df2\u7ecf\u5927\u5b66\u4e86（\u90a3\u6211\u80af\u5b9a\u65e9\u5c31\u4e0a\u8fc7\u521d\u4e2d\u4e86\u5440）<\/p>\n

    \u7b2c\u4e8c\u79cd\u60c5\u51b5<\/p>\n

    \"\"<\/span>\u200b<\/p>\n

    \u7b49\u52301001~2000\u4f20\u8f93\u5230\u4e86\u4e4b\u540e，7001\u8fd9\u4e2a\u786e\u8ba4\u5e8f\u53f7\u8bf4\u4e0d\u5b9a\u5c31\u8be5\u4f20\u8f93\u8fc7\u53bb\u4e86（3001,4001，\u5c31\u4e0d\u7528\u4f20\u8f93\u56de\u53bb\u4e86\u54c8\u54c8\u54c8）<\/p>\n

    \u63a5\u4e0b\u6765\u6211\u4eec\u8981\u8bf4\u7684\u662f\u7a97\u53e3\u5927\u5c0f\u7684\u95ee\u9898（\u7a97\u53e3\u4e0d\u80fd\u65e0\u9650\u7684\u5927）<\/p>\n

    2.3.2.\u6d41\u91cf\u63a7\u5236<\/h4>\n

    \u662f\u7a97\u53e3\u5927\u5c0f\u7684\u95ee\u9898（\u7a97\u53e3\u4e0d\u80fd\u65e0\u9650\u7684\u5927），\u7a97\u53e3\u592a\u5927\u4e86，\u670d\u52a1\u5668\u5904\u7406\u6570\u636e\u5c31\u5904\u7406\u4e0d\u8fc7\u6765\u4e86<\/p>\n

    \u8fd9\u4e2a\u65f6\u5019\u201c\u8d1f\u53cd\u9988\u201d\u5c31\u5f88\u91cd\u8981\u4e86\u8c03\u6574\u7a97\u53e3\u7684\u5927\u5c0f<\/p>\n

    \u53d1\u9001\u65b9\u7684\u53d1\u9001\u901f\u7387\u4e0d\u80fd\u8d85\u8fc7\u63a5\u6536\u65b9\u7684\u5904\u7406\u80fd\u529b<\/p>\n

    \"\"<\/span>\u200b<\/p>\n

    \u63a5\u6536\u65b9\u6bcf\u6b21\u6536\u5230\u6570\u636e，\u90fd\u4f1a\u901a\u8fc7ack（\u5e94\u7b54\u62a5\u6587）\u8fd4\u56de\u7ed9\u53d1\u9001\u65b9，\u7136\u540e\u53d1\u9001\u65b9\u5c31\u4f1a\u6309\u7167\u8fd9\u4e2a\u6570\u503c\u8c03\u6574\u7a97\u53e3\u7684\u5927\u5c0f（\u4e0d\u80fd\u8d85\u8fc7）<\/p>\n

    \"\"<\/span>\u200b<\/p>\n

    \u4e3a\u5565\u8981\u63a2\u6d4b\u5440：<\/p>\n

    \u521a\u521a\u4e0d\u8ba9\u4f60\u4f20\u8f93\u4e86，\u73b0\u5728\u8ba9\u4f60\u4f20\u8f93\u4e86（\u6015\u6211\u66f4\u65b0\u53ef\u7a97\u53e3\u901a\u77e5\u4e86\u4f60，\u4f46\u662f\u901a\u77e5\u4f60\u7684\u6570\u636e\u62a5\u4e22\u4e86，\u6240\u4ee5\u4e00\u4f1a\u4e0d\u901a\u77e5\u4f60，\u4f60\u5c31\u8981\u8bd5\u63a2\u4e00\u4e0b（\u53d1\u4e2a\u7a97\u53e3\u63a2\u6d4b\u5305），\u95ee\u95ee\u597d\u4e86\u6ca1）<\/p>\n

    \u4f46\u662f\u4f20\u8f93\u8def\u5f84\u4e0a\u7684\u8282\u70b9\u7684\u63a5\u6536\u80fd\u529b\u4e5f\u8981\u8ba1\u7b97\u5728\u5185\u5440（\u4e0d\u80fd\u91cf\u5316，\u6211\u4eec\u5c31\u4e00\u70b9\u4e00\u70b9\u7684\u589e\u5927\u7a97\u53e3，\u7136\u540e\u7efc\u5408\u7a97\u53e3\u5927\u5c0f，\u9009\u5c0f\u7684）\u3002<\/p>\n

    2.3.3.\u62e5\u585e\u63a7\u5236<\/h4>\n

    \u4f46\u662f\u4f20\u8f93\u8def\u5f84\u4e0a\u7684\u8282\u70b9\u7684\u63a5\u6536\u80fd\u529b\u5f88\u96be\u91cf\u5316，\u6240\u4ee5\u6211\u4eec\u5c31\u4e00\u70b9\u4e00\u70b9\u7684\u589e\u5927\u7a97\u53e3，\u7136\u540e\u7efc\u5408\u7a97\u53e3\u5927\u5c0f，\u9009\u5c0f\u7684）\u3002（\u5b9e\u9a8c\u7684\u65b9\u5f0f）<\/p>\n

    \"\"<\/span>\u200b<\/p>\n<\/p>\n

    \u9608\u503c（sstresh）：\u6307\u6570\u589e\u957f\u7684\u7ec8\u70b9，\u7ebf\u6027\u589e\u957f\u7684\u8d77\u70b9（\u5927\u52a0\u901f\u5ea6\u53d8\u6210\u5c0f\u52a0\u901f\u5ea6）<\/p>\n

    \u9996\u5148：<\/p>\n

    \u5ba2\u6237\u7aef\u5148\u6309\u7167\u6bd4\u8f83\u4f4e\u7684\u901f\u5ea6\u53d1\u9001\u6570\u636e（\u5c0f\u4e00\u70b9\u7a97\u53e3）<\/p>\n<\/p>\n

    \u5982\u679c\u6570\u636e\u4f20\u8f93\u7684\u5f88\u987a\u5229（\u51e0\u4e4e\u6ca1\u6709\u4e22\u5305\u7684\u60c5\u51b5）–> \u628a\u7a97\u53e3\u5c1d\u8bd5\u8c03\u5927，\u5927\u5230\u4e00\u5b9a\u7684\u7a0b\u5ea6，\u4e2d\u95f4\u8282\u70b9\u53ef\u80fd\u5c31\u4f1a\u51fa\u73b0\u4e86\u4e22\u5305\u95ee\u9898\u3002\u8fd9\u4e2a\u65f6\u5019\u53d1\u9001\u65b9\u53d1\u73b0\u4e22\u5305\u4e86 –> \u5c31\u628a\u7a97\u53e3\u8c03\u5c0f\u4e00\u70b9 \u3002\u5982\u679c\u8fd8\u662f\u4e22\u5305\u5c31\u7ee7\u7eed\u8c03\u5c0f，\u4e0d\u4e22\u5c31\u589e\u5927，–> \u6700\u7ec8\u8fbe\u5230\u52a8\u6001\u5e73\u8861\u7684\u6548\u679c<\/p>\n<\/p>\n

    \u5177\u4f53\u8fc7\u7a0b\u5982\u56fe<\/p>\n

    \"\"<\/span>\u200b<\/p>\n

    \u6539\u8fdb\u63aa\u65bd\u5982\u4e0b：<\/p>\n

    \"\"<\/span>\u200b<\/p>\n

    \u603b\u4e4b：<\/p>\n

    \u6d41\u91cf\u63a7\u5236：\u901a\u8fc7\u63a5\u6536\u65b9\u8fd4\u56de\u7684\u5269\u4f59\u7f13\u51b2\u533a\u5927\u5c0f\u6765\u786e\u5b9a\u7a97\u53e3\u5927\u5c0f（\u4e3b\u8981\u8003\u8651\u63a5\u6536\u65b9\u5904\u7406\u80fd\u529b）（\u5b9a\u91cf）<\/p>\n

    \u62e5\u585e\u63a7\u5236：\u901a\u8fc7\u5b9e\u9a8c\u7684\u65b9\u5f0f\u4e00\u6b65\u4e00\u6b65\u52a8\u6001\u7a33\u5b9a\u7a97\u53e3\u7684\u5927\u5c0f（\u4e3b\u8981\u8003\u8651\u4e2d\u95f4\u8282\u70b9\u7684\u5904\u7406\u80fd\u529b）<\/p>\n

    （\u975e\u5b9a\u91cf）<\/p>\n

    \u6700\u7ec8\u7a97\u53e3\u5927\u5c0f\u53d6\u4e8c\u8005\u4e2d\u6700\u5c0f\u503c<\/p>\n

    2.3.4.\u5ef6\u65f6\u5e94\u7b54<\/h4>\n

    \"\"<\/span>\u200b<\/p>\n

    \u800c\u4e14\u6211\u4eec\u901a\u8fc7\u5ef6\u65f6\u5e94\u7b54\u4e5f\u53ef\u4ee5\u628a\u56db\u6b21\u6325\u624b\u53d8\u6210\u4e09\u6b21\u6325\u624b<\/p>\n

    \"\"<\/span>\u200b<\/p>\n

    2.3.5.\u634e\u5e26\u5e94\u7b54（\u5c31\u662f\u628a\u672c\u6765\u4e24\u4e2a\u6570\u636e\u6bb5\u4e00\u8d77\u8fd4\u56de\u4e86）<\/h4>\n

    \u5c31\u50cf\u56db\u6b21\u6325\u624b\u53d8\u6210\u4e09\u6b21\u4e00\u6837<\/p>\n

    \"\"<\/span>\u200b<\/p>\n

    \u521a\u597d\u628aresponse\u548cack\u4e00\u8d77\u8fd4\u56de<\/p>\n

    \u8fdb\u4e00\u6b65\u63d0\u9ad8\u4e86\u6548\u7387<\/p>\n

    \u672c\u6765\u8981\u4f20\u8f93\u4e24\u4e2atcp\u6570\u636e\u5305，\u6211\u4eec\u8981\u5c01\u88c5\u5206\u7528\u4e24\u6b21<\/p>\n

    \u4f46\u662f\u7528\u8fc7\u4e0a\u8ff0\u7684\u64cd\u4f5c，\u5c31\u53ef\u4ee5\u628a\u4e24\u4e2a\u6570\u636e\u5305\u5408\u5e76\u5728\u4e00\u8d77\u4e86，\u73b0\u5728\u6211\u4eec\u5c01\u88c5\u5206\u7528\u4e00\u6b21\u5c31\u884c\u4e86<\/p>\n

    2.4.\u7c98\u5305\u95ee\u9898<\/h3>\n

    \u5f88\u591a\u9762\u5411\u5b57\u8282\u6d41\u4f20\u8f93\u6570\u636e\u7684\u65f6\u5019\u90fd\u4f1a\u51fa\u73b0\u8fd9\u6837\u7684\u60c5\u51b5<\/p>\n

    \"\"<\/span>\u200b<\/p>\n

    \u4f46\u662fUDP\u5c31\u6ca1\u6709\u8fd9\u6837\u7684\u95ee\u9898（UDP\u672c\u6765\u5c31\u662f\u4e00\u4e2a\u4e00\u4e2a\u7684\u6570\u636e\u5305（\u6709\u8fb9\u754c\u7684））<\/p>\n

    \"\"<\/span>\u200b<\/p>\n

    \u6240\u4ee5\u6211\u4eec\u89e3\u51b3\u7c98\u5305\u95ee\u9898\u7684\u5173\u952e\u5c31\u662f\u600e\u4e48\u641e\u4e00\u4e2a\u8fb9\u754c\u51fa\u6765<\/p>\n

    \u8fd9\u5c31\u8ba9\u6211\u60f3\u8d77\u6765\u201c\u5faa\u73af\u961f\u5217\u201d<\/p>\n

    \u5f53head \u548c tail \u91cd\u5408\u7684\u65f6\u5019\u5230\u5e95\u662f\u8fd9\u4e2a\u6570\u7ec4\u6ee1\u4e86\u8fd8\u662f\u6570\u7ec4\u662f\u7a7a\u7684？<\/p>\n

    \u4e24\u4e2a\u65b9\u6848<\/p>\n

    1.\u641e\u4e00\u4e2a\u6807\u5fd7\u4f4d（\u6d6a\u8d39\u4e00\u4e2a\u683c\u5b50，\u5f53head =\u00a0 tail + 1\u7684\u65f6\u5019\u5c31\u662f\u6ee1\u7684，head = tail\u5c31\u662f\u7a7a\u7684）<\/p>\n

    2.\u5f15\u5165\u6709\u6548\u957f\u5ea6（\u5f53length = array.length\u5c31\u662f\u6162\u7684 ，length = 0\u5c31\u662f\u7a7a\u7684）<\/p>\n

    \u8fd9\u4e2a\u65f6\u5019\u4e5f\u662f<\/p>\n

    1.\u641e\u4e00\u4e2a\u6807\u5fd7\u4f4d（\u5f15\u5165\u5206\u5272\u7b26）<\/p>\n

    \"\"<\/span>\u200b<\/p>\n

    2.\u5f15\u5165\u957f\u5ea6（\u8b6c\u5982\u5148\u8bfb\u4e24\u4e2a\u4e24\u4e2a\u76f4\u63a5\u7684\u6570\u5b57\u8868\u793a\u8fd9\u4e2a\u6570\u636e\u5305\u4e2d\u7684\u5b57\u8282\u6709\u591a\u957f）<\/p>\n

    \"\"<\/span>\u200b<\/p>\n

    2.5.\u5f02\u5e38\u7684\u5904\u7406\u60c5\u51b5<\/h3>\n

    \u4e00\u822c\u5206\u4e3a\u4e24\u79cd\u60c5\u51b5<\/p>\n

    1.\u8fdb\u7a0b\u5f02\u5e38\u7ed3\u675f<\/p>\n

    2.\u8fdb\u7a0b\u90fd\u6ca1\u6765\u5f97\u53ca\u6740，\u901a\u4fe1\u5c31\u65ad\u4e86<\/p>\n

    2.5.1.\u8fdb\u7a0b\u5f02\u5e38\u7ed3\u675f<\/h4>\n

    \u9996\u5148\u6211\u8981\u58f0\u660e<\/p>\n

    TCP \u8fde\u63a5\u7684\u72b6\u6001（\u5982\u00a0ESTABLISHED（\u5df2\u7ecf\u5efa\u7acb\u597d\u8fde\u63a5）TIME_WAIT(\u5ef6\u65f6\u7b49\u5f85）\u00a0\u7b49）\u7531\u5185\u6838\u534f\u8bae\u6808\u7ef4\u62a4，\u800c\u975e\u5e94\u7528\u7a0b\u5e8f\u3002<\/p>\n<\/p>\n

    \u5728 TCP \u534f\u8bae\u4e2d，\u56db\u6b21\u6325\u624b\u662f\u7531\u64cd\u4f5c\u7cfb\u7edf\u5185\u6838\u5b9e\u73b0\u7684（severSocket.accept()\u53ea\u662f\u62ff\u5230\u5185\u6838\u5efa\u7acb\u597d\u7684\u8fde\u63a5），\u800c\u975e\u4f9d\u8d56\u4e8e\u5e94\u7528\u7a0b\u5e8f\u663e\u5f0f\u8c03\u7528 socket.close()\u3002\u5f53\u8fdb\u7a0b\u5f02\u5e38\u7ec8\u6b62\u65f6（\u5982\u5d29\u6e83\u6216\u88ab\u5f3a\u5236\u6740\u6b7b），\u64cd\u4f5c\u7cfb\u7edf\u4f1a\u4e3b\u52a8\u56de\u6536\u8be5\u8fdb\u7a0b\u5360\u7528\u7684\u8d44\u6e90（\u5305\u62ec\u6587\u4ef6\u63cf\u8ff0\u7b26），\u5e76\u89e6\u53d1\u5185\u6838\u534f\u8bae\u6808\u7684 TCP \u8fde\u63a5\u5173\u95ed\u6d41\u7a0b\u3002<\/p>\n

    \u5728Java\u4e2d，\u5f53\u521b\u5efa\u4e00\u4e2aSocket\u5bf9\u8c61\u65f6，\u5e95\u5c42\u64cd\u4f5c\u7cfb\u7edf\u4f1a\u5206\u914d\u4e00\u4e2a\u6587\u4ef6\u63cf\u8ff0\u7b26\u6765\u7ba1\u7406\u8fd9\u4e2a\u8fde\u63a5\u3002\u8fdb\u7a0b\u5f02\u5e38\u7ec8\u6b62\u65f6，\u64cd\u4f5c\u7cfb\u7edf\u901a\u5e38\u4f1a\u8d1f\u8d23\u6e05\u7406\u8fdb\u7a0b\u5360\u7528\u7684\u8d44\u6e90，\u5305\u62ec\u5173\u95ed\u6253\u5f00\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26\u3002<\/p>\n

    \u8fdb\u7a0b\u5f02\u5e38\u7ed3\u675f\u7684\u4e24\u79cd\u60c5\u51b5：\u8fdb\u7a0b\u5d29\u6e83\u548c\u4e3b\u673a\u5173\u673a\u4e86（\u7528\u6237\u81ea\u5df1\u5173\u673a\u7684）<\/p>\n

    \"\"<\/span>\u200b<\/h4>\n

    2.5.2.\u901a\u4fe1\u76f4\u63a5\u65ad\u5f00\u4e86（\u8fdb\u7a0b\u90fd\u6ca1\u6765\u5f97\u53ca\u6740）（\u60f3\u56de\u5e94\u4f46\u662f\u56de\u5e94\u4e0d\u4e86）<\/h4>\n

    1.\u4e3b\u673a\u6389\u7535（\u5c31\u50cf\u63d2\u5934\u677e\u4e86\u4e00\u6837）（\u53c8\u5206\u4e3a\u5ba2\u6237\u7aef\u6389\u7535\u6216\u8005\u670d\u52a1\u5668\u6389\u7535）<\/p>\n

    （1）\u5ba2\u6237\u7aef\u6389\u7535：\u672c\u6765\u8fd8\u5728\u6b63\u5e38\u7684\u901a\u4fe1，\u7ed3\u679c\u5ba2\u6237\u7aef\u76f4\u63a5\u6389\u7535\u4e86，\u670d\u52a1\u5668\u90fd\u61f5\u4e86（\u5ba2\u6237\u7aef\u600e\u4e48\u8fd8\u4e0d\u8fd4\u56deack？）\u7136\u540e\u5c31\u5f00\u59cb\u8d85\u65f6\u91cd\u4f20，\u7ed3\u679c\u8fd8\u662f\u4e00\u76f4\u4e0d\u56de（\u5bf9\u65b9\u6302\u4e86？）\u3002<\/p>\n<\/p>\n

    \u518d\u7136\u540e\u53d1\u9001\u201c\u5fc3\u8df3\u5305\u201d，\u7ed3\u679c\u8fd8\u662f\u4e0d\u56de，\u7136\u540e\u5c31\u8ba4\u4e3a\u5ba2\u6237\u7aef\u6302\u4e86\u8fd9\u4e2a\u65f6\u5019\u5c31\u53ef\u4ee5\u5355\u65b9\u9762\u91ca\u653e\u8fde\u63a5\u4e86\u3002<\/p>\n

    \u56fe\u89e3：<\/p>\n

    \"\"<\/span>\u200b<\/p>\n

    \u6ce8\u89e3：<\/p>\n

    \u670d\u52a1\u5668\u4e0d\u662f\u8fd9\u4e2a\u65f6\u5019\u624d\u4f1a\u53d1\u9001\u201c\u5fc3\u8df3\u5305\u201d，\u800c\u662f\u5468\u671f\u7684\u5c31\u4f1a\u53d1\u9001\u5fc3\u8df3\u5305（\u4e0d\u5e26\u4e1a\u52a1\u7684\u6570\u636e\u5305），\u671f\u671b\u56de\u590d，\u591a\u6b21\u6ca1\u56de\u590d\u5c31\u8ba4\u4e3a\u5bf9\u65b9\u6302\u4e86<\/p>\n

    （2）\u670d\u52a1\u5668\u6389\u7535：<\/p>\n

    \u8fd8\u662f\u4e00\u6837\u7684，\u5ba2\u6237\u7aef\u4e00\u76f4\u53d1\u6570\u636e，\u670d\u52a1\u5668\u4e0d\u56de\u5e94；\u8d85\u65f6\u91cd\u4f20\u8fd8\u662f\u4e0d\u56de\u5e94\u3002\u5ba2\u6237\u7aef\u4f1a\u53d1\u9001\u4e00\u4e2a\u201c\u590d\u4f4d\u62a5\u6587\u6bb5\u201d（RST）（reset），\u5982\u679cFST\u53d1\u8fc7\u53bb\u8fd8\u6ca1\u6709\u56de\u590d，\u5c31\u4f1a\u5355\u65b9\u9762\u91ca\u653e\u8fde\u63a5<\/p>\n

    \"\"<\/span>\u200b<\/p>\n

    ACK：\u5e94\u7b54\u62a5\u6587<\/p>\n

    RST：\u590d\u4f4d\u62a5\u6587\u6bb5<\/p>\n

    SYN：\u540c\u6b65\u62a5\u6587\u6bb5（\u5efa\u7acb\u8fde\u63a5\u65f6\u53d1\u9001），\u5efa\u7acb\u597d\u8fde\u63a5\u8fdb\u5165（ESTABLISH\u72b6\u6001）<\/p>\n

    FIN：\u7ed3\u675f\u62a5\u6587\u6bb5（\u4e3b\u52a8\u53d1\u8d77FIN\u7684\u8fdb\u5165TIME_WAIT\u72b6\u6001）<\/p>\n<\/p>\n

    2.\u7f51\u7ebf\u65ad\u5f00（\u548c\u6389\u7535\u5341\u5206\u76f8\u4f3c，\u4e0d\u8fc7\u8fd9\u4fe9\u4e00\u4e2a\u53d1\u590d\u4f4d\u62a5\u6587\u6bb5，\u4e00\u4e2a\u53d1\u5fc3\u8df3\u5305，\u4f46\u662f\u5c31\u662f\u8fde\u63a5\u4e0d\u4e0a\u54c8\u54c8）\u3002<\/p>\n

    TCP\u7684\u5fc3\u8df3\u673a\u5236：\u518d\u5206\u5e03\u5f0f\u7cfb\u7edf\u4e2d\u5341\u5206\u5e38\u89c1\u3002\u4e00\u822c\u68c0\u6d4b\u4e00\u4e2a\u673a\u5668\u662f\u5426\u6302\u4e86\u90fd\u662f\u901a\u8fc7\u201c\u5fc3\u8df3\u673a\u5236\u201d\u6765\u68c0\u6d4b（\u4e0d\u8fc7\u540e\u7eed\u4f7f\u7528\u7684\u5fc3\u8df3\u673a\u5236\u90fd\u662f\u5728\u5e94\u7528\u7a0b\u5e8f\u4e2d\u81ea\u5df1\u5b9e\u73b0\u7684（\u4e00\u822c\u90fd\u662f\u6beb\u79d2\u7ea7\u522b\u4e86），\u800c\u4e0d\u662fTCP\u7684\u5fc3\u8df3（\u65f6\u95f4\u592a\u957f））<\/p>\n

    3.UDP\u548cTCP\u4e4b\u95f4\u7684\u5bf9\u6bd4<\/h2>\n

    \u7b2c\u4e00\u70b9\u5bf9\u6bd4：<\/p>\n

    TCP：\u53ef\u9760\u4f20\u8f93，\u6709\u91cd\u7ec4\u673a\u5236（\u80fd\u4f20\u8f93\u5f88\u5927\u7684\u6570\u636e）\u3002<\/p>\n<\/p>\n

    \u5728\u63a5\u6536\u65b9，TCP\u534f\u8bae\u4f1a\u6839\u636e\u6bcf\u4e2aTCP\u6bb5\u7684\u5e8f\u5217\u53f7\u6765\u91cd\u7ec4\u8fd9\u4e9b\u6570\u636e\u3002100kb\u7684\u6570\u636e\u53ef\u4ee5\u5206\u6210\u597d\u51e0\u4e2a\u6bb5，\u63a5\u6536\u65b9\u7684TCP\u534f\u8bae\u4f1a\u6309\u7167\u5e8f\u5217\u53f7\u987a\u5e8f\u5c06\u8fd9\u4e9bTCP\u6bb5\u91cd\u65b0\u7ec4\u88c5\u6210\u5b8c\u6574\u7684100 KB\u6570\u636e\u3002（\u9002\u5408\u7edd\u5927\u90e8\u5206\u7684\u573a\u666f）<\/p>\n<\/p>\n

    UDP：\u6548\u7387\u66f4\u9ad8，\u65e0\u91cd\u7ec4\u673a\u5236（\u53ea\u80fd\u4f20\u8f93\u5f88\u5c0f\u7684\u6570\u636e）\u3002<\/p>\n<\/p>\n

    UDP\u534f\u8bae\u672c\u8eab\u4e0d\u63d0\u4f9b\u6570\u636e\u5206\u6bb5\u548c\u91cd\u7ec4\u7684\u529f\u80fd\u3002\u6bcf\u4e2aUDP\u6570\u636e\u62a5（datagram）（\u66f4\u9002\u5408\u4e8e\u201c\u53ef\u9760\u6027\u4e0d\u662f\u5f88\u654f\u611f，\u6027\u80fd\u654f\u611f，\u6570\u636e\u4e0d\u591a\u201d\u7684\u573a\u666f：\u8b6c\u5982\u540c\u4e00\u4e2a\u5c40\u57df\u7f51\u4e3b\u673a\u4e4b\u95f4\u7684\u901a\u4fe1<\/p>\n

    \u800c\u4e14\u5728\u4ee5\u592a\u7f51\u4e2dUDP\u548cTCP\u6570\u636e\u62a5\u6700\u5927\u4e0d\u4f1a\u8d85\u8fc71500\u5b57\u8282（\u53d7MTU（\u6700\u5927\u4f20\u8f93\u5355\u5143）\u7684\u5f71\u54cd）（\u540e\u9762\u6211\u4eec\u4f1a\u8bb2\u89e3\u5230）<\/p>\n

    \u7b2c\u4e8c：<\/p>\n

    UDP\u5929\u7136\u9002\u5408\u201c\u5e7f\u64ad\u4f20\u8f93\u201d（\u7ed9\u8fd9\u4e2a\u5c40\u57df\u7f51\u5185\u6240\u6709\u7684\u8bbe\u5907\u90fd\u53d1\u9001\u4fe1\u606f），\u800cTCP\u4e0d\u652f\u6301（TCP\u53ea\u80fd\u904d\u5386\u8fd9\u4e2a\u5c40\u57df\u7f51\u8bbe\u5907\u91cc\u9762\u7684\u6240\u6709IP\u5b9e\u5728\u662f\u592a\u9ebb\u70e6）<\/p>\n

    \u8fd9\u662f\u56e0\u4e3aUDP\u7684socket\u80fd\u7ed9\u201c\u5e7f\u64ad\u5730\u5740\u201d\u5efa\u7acb\u8054\u7cfb（\u8b6c\u5982192.168.255），\u4f46\u662fTCP\u65e0\u6cd5\u548c\u8fd9\u4e2a\u5730\u5740\u5efa\u7acb\u8054\u7cfb<\/p>\n

    \u7b2c\u4e09：\u82e5UDP\u60f3\u8981\u5b9e\u73b0TCP\u7684\u53ef\u9760\u4f20\u8f93，\u53ef\u4ee5\u53c2\u8003TCP\u7684\u601d\u8def<\/p>\n

    \u786e\u8ba4\u5e94\u7b54（\u5f15\u5165\u5e8f\u53f7\u548c\u786e\u8ba4\u5e8f\u53f7，\u8fd9\u6837\u4e5f\u53ef\u4ee5\u7ec4\u5305\u5566）<\/p>\n

    \u8d85\u65f6\u91cd\u4f20（\u5305\u4e22\u4e86）<\/p>\n

    \u63d0\u9ad8\u6548\u7387\u518d\u6ed1\u52a8\u7a97\u53e3\u7b49\u7b49\u6211\u4eecTCP\u53ef\u9760\u4f20\u8f93\u7684\u7279\u6027\u2026\u2026\u2026\u2026<\/p>\n

    \u7ed3\u675f\u5566~~~<\/span><\/p>\n

    \u6700\u540e\u4e00\u4e2a\u89e3\u7b54<\/p>\n

    \u5927\u5bb6\u53ef\u80fd\u4f1a\u7591\u60d1，\u50cfTCP\u548cUDP\u8fd9\u4e48NB\u7684\u534f\u8bae\u90fd\u662f\u8c01\u6574\u51fa\u6765\u7684？<\/p>\n

    \u5f53\u7136\u662f\u4e00\u7fa4\u795e\u79d8\u7684\u5927\u4f6c，\u628a\u8fd9\u4e9b\u534f\u8bae\u90fd\u6574\u7406\u51fa\u4e00\u4e2a\u6807\u51c6\u7684\u6587\u6863—RFC\u6807\u51c6\u6587\u6863<\/span><\/p>\n

    \u4e0a\u8ff0\u5c31\u662f\u3010TCP\u3011\u4e09\u6b21\u6325\u624b，\u56db\u6b21\u6325\u624b\u8be6\u89e3–UDP\u548cTCP\u534f\u8bae\u8be6\u89e3\u7684\u5168\u90e8\u5185\u5bb9\u5566~~~<\/span><\/p>\n

    \u80fd\u770b\u5230\u8fd9\u91cc\u76f8\u4fe1\u60a8\u4e00\u5b9a\u5bf9\u5c0f\u7f16\u7684\u6587\u7ae0\u6709\u4e86\u4e00\u5b9a\u7684\u8ba4\u53ef\u3002<\/span><\/p>\n

    \u6709\u4ec0\u4e48\u95ee\u9898\u6b22\u8fce\u5404\u4f4d\u5927\u4f6c\u6307\u51fa \u6b22\u8fce\u5404\u4f4d\u5927\u4f6c\u8bc4\u8bba\u533a\u7559\u8a00\u4fee\u6b63~~ \"\"<\/span>\"\"<\/span> \u60a8\u7684\u652f\u6301\u5c31\u662f\u6211\u6700\u5927\u7684\u52a8\u529b\u200b\u200b\u200b！！<\/span>！<\/p><\/p>\n","protected":false},"excerpt":{"rendered":"

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