{"id":590,"date":"2022-12-03T11:00:00","date_gmt":"2022-12-03T03:00:00","guid":{"rendered":"http:\/\/www.spiceandwolf.com.cn\/?p=590"},"modified":"2023-02-26T11:35:59","modified_gmt":"2023-02-26T03:35:59","slug":"transport-layer","status":"publish","type":"post","link":"http:\/\/www.spiceandwolf.com.cn\/index.php\/transport-layer\/","title":{"rendered":"\u8fd0\u8f93\u5c42"},"content":{"rendered":"\n

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\"\"
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\u5c06\u8fd0\u8f93\u5c42\u62a5\u6587\u6bb5\u4e2d\u7684\u6570\u636e\u4ea4\u4ed8\u5230\u6b63\u786e\u7684\u5957\u63a5\u5b57\u7684\u5de5\u4f5c\u79f0\u4e3a\u591a\u8def\u5206\u89e3<\/em><\/strong>\u3002<\/p>\n\n\n\n

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\u8981\u5b9e\u73b0\u4ee5\u4e0a\u4e24\u70b9\u6211\u4eec\u9700\u8981\u8981\u505a\u5230\u4ee5\u4e0b\u4e24\u70b9\uff1a<\/p>\n\n\n\n

    \n
  1. \u5957\u63a5\u5b57\u6709\u552f\u4e00\u6807\u5fd7\u7b26<\/li>\n\n\n\n
  2. \u6bcf\u4e2a\u62a5\u6587\u6bb5\u6709\u7279\u6b8a\u7684\u5b57\u6bb5\u6765\u6307\u793a\u8be5\u62a5\u6587\u6bb5\u7d22\u8981\u4ea4\u4ed8\u5230\u7684\u5957\u63a5\u5b57<\/li>\n<\/ol>\n\n\n\n

    \u6211\u4eec\u5c06\u8fd9\u4e2a\u552f\u4e00\u7684\u6807\u5fd7\u7b26\u53eb\u505a\u7aef\u53e3\u53f7\uff0c\u800c\u6bcf\u4e00\u4e2a\u5957\u63a5\u5b57\u80fd\u591f\u5206\u914d\u4e00\u4e2a\u7aef\u53e3\u53f7<\/em><\/strong>\uff0c\u5728\u62a5\u6587\u6bb5\u4e2d\u5b58\u5728\u6e90\u7aef\u53e3\u53f7<\/em><\/strong>\u548c\u76ee\u7684\u7aef\u53e3\u53f7<\/em><\/strong>\u8fd9\u4e24\u4e2a\u7279\u6b8a\u5b57\u6bb5\uff0c\u7528\u6765\u6807\u5fd7\u53d1\u9001\u7aef\u5e94\u7528\u548c\u63a5\u6536\u7aef\u5e94\u7528\u7684\u5957\u63a5\u5b57\u3002<\/p>\n\n\n\n

    \u6211\u4eec\u53ef\u4ee5\u7b80\u5355\u6a21\u62df\u4e00\u4e0b\u5728\u8fd0\u8f93\u5c42\u53d1\u9001\u548c\u63a5\u6536\u6570\u636e\u7684\u8fc7\u7a0b\uff1a\u5728\u53d1\u9001\u7aef\u4e3b\u673a\uff0c\u5e94\u7528\u7a0b\u5e8f\u5c06\u751f\u6210\u62a5\u6587\uff0c\u7136\u540e\u53d1\u7ed9\u5957\u63a5\u5b57\u8fdb\u884c\u7f16\u7801\uff0c\u8fd0\u8f93\u5c42\u5c06\u5957\u63a5\u5b57\u4e2d\u7684\u6570\u636e\u5757\u6536\u96c6\u8d77\u6765\uff0c\u5e76\u4e3a\u6bcf\u4e2a\u6570\u636e\u5757\u5c01\u88c5\u4e0a\u9996\u90e8\u4fe1\u606f\uff08\u5305\u62ec\u6e90\u7aef\u53e3\u53f7\u548c\u76ee\u7684\u7aef\u53e3\u53f7\uff09\uff0c\u4ece\u800c\u751f\u6210\u62a5\u6587\u6bb5\uff0c\u5e76\u6254\u7ed9\u7f51\u7edc\u5c42\uff1b\u5728\u63a5\u6536\u7aef\uff0c\u8fd0\u8f93\u5c42\u62ff\u5230\u7f51\u7edc\u5c42\u89e3\u6790\u51fa\u7684\u62a5\u6587\u6bb5\uff0c\u68c0\u67e5\u5176\u4e2d\u7684\u76ee\u7684\u7aef\u53e3\u53f7\uff0c\u5e76\u5c06\u5176\u5b9a\u5411\u5230\u76f8\u5e94\u7684\u5957\u63a5\u5b57\u3002<\/p>\n\n\n\n

    \u4e00\u4e2aUDP\u5957\u63a5\u5b57\u662f\u7531\u4e00\u4e2a\u4e8c\u5143\u7ec4\u5168\u9762\u6807\u8bc6\u7684<\/em><\/strong>\uff0c\u8be5\u4e8c\u5143\u7ec4\u5305\u542b\u4e00\u4e2a\u76ee\u7684IP\u5730\u5740\u548c\u4e00\u4e2a\u76ee\u7684\u7aef\u53e3\u53f7\uff0c\u5373UDP\u7684\u5957\u63a5\u5b57\u6807\u5fd7\u7b26\u662f\u76ee\u7684IP\u5730\u5740\u548c\u76ee\u7684\u7aef\u53e3\u53f7\u7684\u7ec4\u5408\u3002<\/p>\n\n\n\n

    \u4e00\u4e2aTCP\u5957\u63a5\u5b57\u662f\u7531\u4e00\u4e2a\u56db\u5143\u7ec4\u6765\u6807\u8bc6\u7684<\/strong><\/em>\uff0c\u8be5\u56db\u5143\u7ec4\u5305\u542b\u6e90IP\u5730\u5740\u3001\u6e90\u7aef\u53e3\u53f7\u3001\u76ee\u7684IP\u5730\u5740\u548c\u76ee\u7684\u7aef\u53e3\u53f7\u3002<\/p>\n\n\n\n

    \u5f53\u63a5\u6536\u7aef\u63a5\u6536\u5230\u62a5\u6587\u6bb5\u540e\uff0c\u53ef\u4ee5\u5c06\u6e90IP\u5730\u5740\u548c\u6e90\u7aef\u53e3\u53f7\u4e0e\u76ee\u7684IP\u5730\u5740\u548c\u76ee\u7684\u7aef\u53e3\u53f7\u4ea4\u6362\u6765\u786e\u5b9a\u54cd\u5e94\u62a5\u6587\u6bb5\u7684\u8fd9\u56db\u4e2a\u9996\u90e8\u5b57\u6bb5\u3002\u8fd9\u4e00\u70b9UDP\u548cTCP\u662f\u4e00\u6837\u7684\u3002<\/p>\n\n\n\n

    \u901a\u8fc7\u6bd4\u8f83\u540e\u4f1a\u53d1\u73b0\uff0c\u57fa\u4e8eUDP\u534f\u8bae\uff0c\u53ef\u4ee5\u540c\u65f6\u5b58\u5728\u591a\u4e2a\u53d1\u9001\u7aef\u8fdb\u7a0b\u7ed9\u4e00\u4e2a\u63a5\u6536\u7aef\u5957\u63a5\u5b57\u53d1\u9001\u6570\u636e\u7684\u60c5\u51b5\uff0c\u4f46\u662f\u57fa\u4e8eTCP\u534f\u8bae\uff0c\u5728\u5efa\u7acb\u8fde\u63a5\u540e\uff0c\u5219\u662f\u540c\u65f6\u53ea\u80fd\u6709\u4e00\u4e2a\u53d1\u9001\u7aef\u8fdb\u7a0b\u7ed9\u4e00\u4e2a\u63a5\u6536\u7aef\u5957\u63a5\u5b57\u53d1\u9001\u6570\u636e\u3002\u540c\u6837\u5c06\u4e3b\u673a\u6bd4\u4f5c\u5bb6\u5ead\uff0c\u5e76\u5c06\u8fdb\u7a0b\u6bd4\u4f5c\u5bb6\u5ead\u6210\u5458\uff0c\u5728\u6b64\u4e4b\u4e0a\u6211\u4eec\u5c06\u53d1\u9001\u7aef\u5957\u63a5\u5b57\u548c\u63a5\u6536\u7aef\u5957\u63a5\u5b57\u6bd4\u4f5c\u4e00\u7537\u4e00\u5973\u7684\u8bdd\uff0c\u5219\u53ef\u4ee5\u5c06UDP\u6bd4\u55bb\u6210\u80fd\u4e00\u59bb\u591a\u592b\u7684\u6cd5\u5f8b\u89c4\u5b9a\uff0c\u5c06TCP\u6bd4\u55bb\u6210\u80fd\u53ea\u80fd\u4e00\u592b\u4e00\u59bb\u7684\u6cd5\u5f8b\u89c4\u5b9a\u3002<\/p>\n\n\n\n

    \"\"
    UDP\u53ef\u4ee5\u591a\u4e2a\u53d1\u9001\u7aef\u5411\u4e00\u4e2a\u5957\u63a5\u5b57\u53d1\u9001\u6570\u636e<\/figcaption><\/figure>\n\n\n\n
    \"\"
    \u57fa\u4e8e\u8fde\u63a5\u7684TCP\u591a\u8def\u590d\u7528<\/figcaption><\/figure>\n\n\n\n
    \"\"
    \u591a\u4e2a\u5ba2\u6237\u4f7f\u7528\u76f8\u540c\u7684\u76ee\u7684\u7aef\u53e3\u53f7\uff0880\uff09\u4e0e\u540c\u4e00\u4e2aWeb\u670d\u52a1\u5668\u5e94\u7528\u901a\u4fe1<\/figcaption><\/figure>\n\n\n\n

    \u63a2\u7a76\u4e00\u4e2a\u95ee\u9898\uff1a\u4e00\u4e2a\u5e94\u7528\u4e2dTCP\u8fde\u63a5\u7684\u4e0a\u9650\u662f\u5426\u662f\u7aef\u53e3\u53f7\u7684\u4e0a\u965065536\uff1f<\/p>\n\n\n\n

    \u9996\u5148\u6e05\u695a\u4ee5\u4e0b\u51e0\u70b9\uff1a<\/p>\n\n\n\n

      \n
    • \u5c06\u8fd0\u8f93\u5c42\u62a5\u6587\u6bb5\u4e2d\u7684\u6570\u636e\u4ea4\u4ed8\u5230\u6b63\u786e\u7684\u5957\u63a5\u5b57\u7684\u5de5\u4f5c\u6210\u4e3a\u591a\u8def\u5206\u89e3<\/li>\n\n\n\n
    • \u6bcf\u4e2a\u5957\u63a5\u5b57\u90fd\u6709\u552f\u4e00\u6807\u5fd7\u7b26<\/li>\n\n\n\n
    • TCP\u6807\u5fd7\u7b26\u4e3a\u56db\u5143\u7ec4\uff1a\u6e90IP\u5730\u5740\u3001\u6e90\u7aef\u53e3\u53f7\u3001\u76ee\u7684\u7aef\u53e3\u5730\u5740\u548c\u76ee\u7684\u7aef\u53e3\u53f7<\/li>\n\n\n\n
    • \u7aef\u53e3\u53f7\u7528\u4e8e\u6807\u8bc6\u8fdb\u7a0b<\/li>\n\n\n\n
    • \u5957\u63a5\u5b57\u548c\u8fdb\u7a0b\u95f4\u6216\u7aef\u53e3\u95f4\u4e0d\u662f\u4e00\u5bf9\u4e00\u5173\u7cfb\uff0c\u4e00\u4e2a\u5957\u63a5\u5b57\u53ea\u80fd\u5206\u914d\u7ed9\u4e00\u4e2a\u7aef\u53e3\uff0c\u4f46\u662f\u4e00\u4e2a\u7aef\u53e3\u53ef\u4ee5\u548c\u591a\u4e2a\u5957\u63a5\u5b57\u5173\u8054<\/li>\n\n\n\n
    • TCP\u9996\u90e8\u6709\u4e00\u4e2a\u7279\u5b9a\u201c\u8fde\u63a5\u5efa\u7acb\u4f4d\u201d\u6807\u5fd7\u4f4d\u7528\u6765\u533a\u5206\u201c\u8fde\u63a5\u5efa\u7acb\u201d\u8bf7\u6c42\u548c\u5176\u4ed6\u8bf7\u6c42<\/li>\n<\/ul>\n\n\n\n

      \u4ee5web\u5e94\u7528\u4e3a\u4f8b\uff0c\u5f53\u53d1\u9001\u65b9\u53d1\u9001\u65b9\u53d1\u9001\u8fde\u63a5\u8bf7\u6c42\u65f6\uff0c\u63a5\u6536\u65b9\u572880\u7aef\u53e3\u63a5\u6536\u5230\u8bf7\u6c42\u62a5\u6587\u6bb5\u540e\uff0c\u901a\u8fc7\u5224\u65ad\u201c\u8fde\u63a5\u5efa\u7acb\u201d\u6807\u5fd7\u4f4d\uff0c\u5224\u65ad\u51fa\u5f53\u524d\u662f\u4e00\u4e2a\u201c\u8fde\u63a5\u5efa\u7acb\u201c\u7684\u8bf7\u6c42\uff0c\u5b83\u5c31\u5b9a\u4f4d\u670d\u52a1\u5668\u8fdb\u7a0b\uff0c\u8be5\u8fdb\u7a0b\u4f1a\u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u5957\u63a5\u5b57\u7528\u6765\u5904\u7406\u5f53\u524d\u8fde\u63a5\u7684\u8bf7\u6c42\uff08\u540c\u6837\u4e0e80\u7aef\u53e3\u5173\u8054\uff09\uff1b\u5efa\u7acb\u8fde\u63a5\u540e\uff0c\u5f53\u53d1\u9001\u7aef\u53d1\u9001\u8d44\u6e90\u8bf7\u6c42\u65f6\uff0c\u8fd0\u8f93\u5c42\u4f1a\u6839\u636e\u56db\u5143\u7ec4\u5c06\u62a5\u6587\u6bb5\u5206\u89e3\u7ed9\u5bf9\u5e94\u7684\u5957\u63a5\u5b57\uff0c\u8fd9\u6837\u5c31\u80fd\u8fdb\u884c\u57fa\u4e8e\u8fde\u63a5\u7684\u6570\u636e\u4ea4\u4e92\u4e86\u3002<\/p>\n\n\n\n

      \u7efc\u4e0a\uff0cTCP\u4e2d\u4e00\u4e2a\u65b0\u7684\u8fde\u63a5\u5bf9\u5e94\u4e00\u4e2a\u65b0\u7684\u5957\u63a5\u5b57\uff0c\u4f46\u662f\u65b0\u5efa\u7684\u5957\u63a5\u5b57\u5e76\u4e0d\u4f1a\u91cd\u65b0\u968f\u673a\u5206\u914d\u65b0\u7684\u7aef\u53e3\uff0c\u4ecd\u7136\u662f\u8ddf\u539f\u6709\u7aef\u53e3\u76f8\u5173\u8054\uff0c\u6240\u4ee5\u7406\u8bba\u4e0a\u4e00\u4e2a\u57fa\u4e8eTCP\u7684\u5e94\u7528\u7684\u670d\u52a1\u5668\u7aef\u4e2d\u7684\u6700\u5927\u8fde\u63a5\u662f\u6e90IP\u7684\u4e0a\u9650*\u6e90\u7aef\u53e3\u53f7\u7684\u4e0a\u9650\uff0c\u8fdc\u8fdc\u4e0d\u6b6265536\u3002<\/p>\n\n\n\n

      \u53ef\u9760\u6570\u636e\u4f20\u8f93<\/h3>\n\n\n\n

      \u53ef\u9760\u6570\u636e\u4f20\u8f93\u662f\u4e3a\u4e0a\u5c42\u5b9e\u4f53\u63d0\u4f9b\u4e86\u670d\u52a1\u62bd\u8c61\uff1a\u6570\u636e\u53ef\u4ee5\u901a\u8fc7\u4e00\u6761\u53ef\u9760\u7684\u4fe1\u9053\u8fdb\u884c\u4f20\u8f93\u3002\u57fa\u4e8e\u53ef\u9760\u4fe1\u9053\uff0c\u4f20\u8f93\u6570\u636e\u6bd4\u7279\u5c31\u4e0d\u4f1a\u53d7\u5230\u635f\u574f\uff08\u75310\u53d81\uff09\u6216\u4e22\u5931\uff0c\u5e76\u4e14\u6240\u6709\u6570\u636e\u90fd\u662f\u6309\u7167\u5176\u53d1\u9001\u987a\u5e8f\u8fdb\u884c\u4ea4\u4ed8\u3002\u8fd9\u6070\u597d\u5c31\u662fTCP\u5411\u8c03\u7528\u5b83\u7684\u56e0\u7279\u7f51\u5e94\u7528\u63d0\u4f9b\u7684\u670d\u52a1\u6a21\u578b\u3002<\/p>\n\n\n\n

      \"\"
      \u53ef\u9760\u6570\u636e\u4f20\u8f93\uff1a\u670d\u52a1\u6a21\u578b\u4e0e\u670d\u52a1\u5b9e\u73b0<\/figcaption><\/figure>\n\n\n\n

      \u5b9e\u73b0\u53ef\u9760\u6570\u636e\u4f20\u8f93\u7684\u662f\u53ef\u9760\u6570\u636e\u4f20\u8f93\u534f\u8bae\u3002\u6211\u4eec\u5c06\u4ece\u6700\u7b80\u5355\u7684\u6570\u636e\u4f20\u8f93\u573a\u666f\u51fa\u53d1\uff0c\u9010\u6b65\u8fd8\u539f\u51fa\u4e00\u822c\u7684\u771f\u5b9e\u573a\u666f\uff0c\u5e76\u7ed9\u51fa\u5728\u4e0d\u540c\u573a\u666f\u4e0b\u5b9e\u73b0\u53ef\u9760\u4f20\u8f93\u7684\u534f\u8bae\u5b9e\u73b0\u3002<\/p>\n\n\n\n

      \u9996\u5148\u6211\u4eec\u7ed9\u51fa\u80cc\u666f\u524d\u63d0\uff1a<\/p>\n\n\n\n

        \n
      1. \u4e0b\u5c42\u534f\u8bae\u4e0d\u4e00\u5b9a\u63d0\u4f9b\u53ef\u9760\u4f20\u8f93<\/li>\n\n\n\n
      2. \u5047\u8bbe\u5206\u7ec4\u5c06\u4ee5\u5b83\u4eec\u53d1\u9001\u7684\u6b21\u5e8f\u8fdb\u884c\u4ea4\u4ed8\uff0c\u4e5f\u5c31\u662f\u8bf4\uff0c\u5e95\u5c42\u4fe1\u9053\u5c06\u4e0d\u4f1a\u5bf9\u5206\u7ec4\u91cd\u6392\u5e8f<\/li>\n<\/ol>\n\n\n\n

        \u6211\u4eec\u7528\u6709\u9650\u72b6\u6001\u673a\u8868\u793a\u4e8b\u4ef6\u6d41\u7a0b\u5982\u4f55\u54cd\u5e94\uff0c\u5e76\u7528\u65f6\u5e8f\u56fe\u6765\u8865\u5145\u8bf4\u660e\u3002<\/p>\n\n\n\n

        \u7ecf\u5b8c\u5168\u53ef\u9760\u4fe1\u9053\u7684\u53ef\u9760\u6570\u636e\u4f20\u8f93\uff1ardt1.0<\/h4>\n\n\n\n

        \u6700\u7b80\u5355\u7684\u60c5\u51b5\uff1a\u5e95\u5c42\u4fe1\u9053\u63d0\u4f9b\u53ef\u9760\u6570\u636e\u4f20\u8f93\u3002\u6b64\u65f6\u7684\u6709\u9650\u72b6\u6001\u673a\u8868\u793a\u7684\u534f\u8bae\u5982\u4e0b\u56fe\u6240\u793a\u3002\u56e0\u4e3a\u5e95\u5c42\u63d0\u4f9b\u53ef\u9760\u6570\u636e\u4f20\u8f93\uff0c\u6240\u4ee5\u53d1\u9001\u65b9\u53ea\u9700\u8981\u53d1\u9001\u6570\u636e\u5c31\u884c\u4e86\uff0c\u4e0d\u7528\u62c5\u5fc3\u6570\u636e\u662f\u5426\u6b63\u786e\u4f20\u8f93\u6216\u4e22\u5931\u7684\u60c5\u51b5\uff0c\u5168\u6743\u7531\u5e95\u5c42\u534f\u8bae\u8d1f\u8d23\u3002\u800c\u63a5\u6536\u65b9\u4e5f\u53ea\u7528\u63a5\u6536\u5206\u7ec4\u5c31\u8db3\u591f\u4e86\u3002<\/p>\n\n\n\n

        \"\"
        rdt1.0 \u53d1\u9001\u7aef<\/figcaption><\/figure>\n\n\n\n
        \"\"
        rdt1.0 \u63a5\u6536\u7aef<\/figcaption><\/figure>\n\n\n\n

        \u7ecf\u5177\u6709\u6bd4\u7279\u5dee\u9519\u4fe1\u9053\u7684\u53ef\u9760\u6570\u636e\u4f20\u8f93\uff1ardt2.0<\/h4>\n\n\n\n

        \u8be5\u573a\u666f\u4e0b\uff0c\u5047\u8bbe\u5e95\u5c42\u4fe1\u9053\u4e2d\u7684\u5206\u7ec4\u53ef\u80fd\u53d7\u635f\u3002\u56e0\u4e3a\u4e0d\u50cf\u4e0a\u4e00\u4e2a\u573a\u666f\u6570\u636e\u4f20\u8f93\u5fc5\u5b9a\u4f1a\u6210\u529f\uff0c\u4e3a\u4e86\u8ba9\u53d1\u9001\u65b9\u4e86\u89e3\u5230\u53d1\u9001\u7ed3\u679c\uff0c\u63a5\u6536\u65b9\u9700\u8981\u8fdb\u884c\u53cd\u9988\uff0c\u5373\u901a\u8fc7\u54cd\u5e94\u5206\u7ec4\u7684\u5f62\u5f0f\uff0c\u800c\u8fd9\u65f6\u6570\u636e\u4f20\u8f93\u6709\u4e24\u79cd\u7ed3\u679c\uff0c\u4e00\u79cd\u662f\u6ca1\u6709\u6bd4\u7279\u5dee\u9519\uff0c\u4e00\u79cd\u662f\u5b58\u5728\u6bd4\u7279\u5dee\u9519\uff08\u5148\u5047\u8bbe\u901a\u8fc7\u6821\u9a8c\u548cchecksum\u8fdb\u884c\u5dee\u9519\u68c0\u6d4b\uff09\uff0c\u6839\u636e\u662f\u5426\u6709\u6bd4\u7279\u5dee\u9519\uff0c\u6211\u4eec\u628a\u54cd\u5e94\u5206\u7ec4\u5206\u4e3a”\u5426\u5b9a\u786e\u8ba4”\uff08NAK\uff09\u548c”\u80af\u5b9a\u786e\u8ba4”\uff08ACK\uff09\u3002\u800c\u5f53\u53d1\u9001\u65b9\u63a5\u6536\u5230\u5426\u5b9a\u786e\u8ba4\u65f6\uff0c\u53d1\u9001\u65b9\u5c06\u91cd\u4f20\u8be5\u5206\u7ec4\u3002<\/p>\n\n\n\n

        \"\"
        rdt2.0 \u53d1\u9001\u7aef<\/figcaption><\/figure>\n\n\n\n
        \"\"
        rdt2.0 \u63a5\u6536\u7aef<\/figcaption><\/figure>\n\n\n\n

        \u4e0a\u9762\u7684rdt2.0\u534f\u8bae\u5ffd\u7565\u4e86\u4e00\u4e2a\u95ee\u9898\uff0c\u5373ACK\u548cNAK\u5206\u7ec4\u4e5f\u53ef\u80fd\u53d7\u635f\uff0c\u6240\u4ee5\u5728ACK\u548cNAK\u5206\u7ec4\u4e2d\u4e5f\u8981\u52a0\u5165\u6821\u9a8c\u548c\u7528\u4e8e\u5224\u65ad\u5206\u7ec4\u662f\u5426\u53d7\u635f\uff0c\u4f46\u662f\u95ee\u9898\u5728\u4e8e\u5728\u63a5\u6536\u65b9\u53d1\u9001\u7684ACK\u6216NAK\u53d7\u635f\u540e\uff0c\u53d1\u9001\u65b9\u65e0\u6cd5\u5f97\u77e5\u63a5\u6536\u65b9\u662f\u5426\u6536\u5230\u4e86\u81ea\u5df1\u53d1\u9001\u7684\u5206\u7ec4\u3002\u8fd9\u91cc\u6709\u4e09\u79cd\u89e3\u51b3\u65b9\u5f0f\uff1a<\/p>\n\n\n\n

          \n
        1. \u53d1\u9001\u7aef\u53d1\u9001\u4e00\u4e2a\u8be2\u95ee\u5206\u7ec4\u7528\u4ee5\u8be2\u95ee\u63a5\u6536\u7aef\u662f\u5426\u63a5\u6536\u5230\u4e86\u5206\u7ec4\u3002\u6b64\u65f6\u5982\u679c\u8fd9\u4e2a\u8be2\u95ee\u62a5\u6587\u518d\u6b21\u51fa\u73b0\u6bd4\u7279\u5dee\u9519\uff0c\u5219\u63a5\u6536\u7aef\u672c\u80fd\u7684\u4f1a\u731c\u6d4b\u53d1\u9001\u7aef\u53ef\u80fd\u5b58\u5728\u7684\u4e24\u79cd\u610f\u56fe\uff1a\u4e00\u79cd\u662f\u53d1\u9001\u7aef\u6b63\u5e38\u63a5\u6536\u5230\u81ea\u5df1\u7684\u54cd\u5e94\u5206\u7ec4\u540e\uff0c\u7ee7\u7eed\u53d1\u9001\u7684\u540e\u7eed\u5206\u7ec4\uff1b\u7b2c\u4e8c\u79cd\u662f\u53d1\u9001\u7aef\u6536\u5230\u7684\u54cd\u5e94\u5206\u7ec4\u53d7\u635f\uff0c\u800c\u540e\u53d1\u9001\u7aef\u53d1\u9001\u4e86\u8be2\u95ee\u5206\u7ec4\uff0c\u4e8e\u662f\uff0c\u8fd9\u65f6\u5c31\u51fa\u73b0\u4e86\u4e24\u79cd\u5206\u652f\u60c5\u51b5\uff0c\u540e\u7eed\u5e94\u7b54\u5c06\u53d8\u5f97\u6a21\u7cca\u3002<\/li>\n\n\n\n
        2. \u589e\u52a0\u8db3\u591f\u7684\u68c0\u9a8c\u548c\u6bd4\u7279\uff0c\u4f7f\u53d1\u9001\u65b9\u4e0d\u4ec5\u53ef\u4ee5\u68c0\u6d4b\u5dee\u9519\uff0c\u8fd8\u53ef\u4ee5\u6062\u590d\u5dee\u9519\u3002\u5bf9\u4e8e\u4f1a\u4ea7\u751f\u5dee\u9519\u4f46\u4e0d\u4e22\u5931\u5206\u7ec4\u7684\u4fe1\u9053\uff0c\u8fd9\u5c31\u53ef\u4ee5\u76f4\u63a5\u89e3\u51b3\u95ee\u9898\u3002<\/li>\n\n\n\n
        3. \u5f53\u53d1\u9001\u65b9\u6536\u5230\u542b\u7cca\u4e0d\u6e05\u7684ACK\u6216NAK\u5206\u7ec4\u65f6\uff0c\u53ea\u9700\u91cd\u4f20\u5f53\u524d\u6570\u636e\u5206\u7ec4\u5373\u53ef\u3002\u8fd9\u79cd\u65b9\u6cd5\u7684\u526f\u4f5c\u7528\u662f\u5728\u53d1\u9001\u65b9\u5230\u63a5\u6536\u65b9\u7684\u4fe1\u9053\u4e2d\u5f15\u5165\u4e86\u5197\u4f59\u5206\u7ec4\u3002\u5197\u4f59\u5206\u7ec4\u7684\u95ee\u9898\u5728\u4e8e\u63a5\u6536\u65b9\u73b0\u5728\u4f1a\u63a5\u6536\u5230\u4e24\u79cd\u5206\u7ec4\uff0c\u4e00\u79cd\u662f\u65b0\u5206\u7ec4\uff0c\u4e00\u79cd\u662f\u5197\u4f59\u5206\u7ec4\uff0c\u56e0\u4e3a\u63a5\u6536\u65b9\u5e76\u4e0d\u77e5\u9053\u81ea\u5df1\u53d1\u9001\u7684ACK\u6216NAK\u662f\u5426\u88ab\u53d1\u9001\u65b9\u63a5\u53d7\u5230\uff0c\u6240\u4ee5\u65e0\u6cd5\u5224\u65ad\u63a5\u6536\u5230\u7684\u5206\u7ec4\u662f\u65b0\u5206\u7ec4\u8fd8\u662f\u5197\u4f59\u5206\u7ec4\u3002<\/li>\n<\/ol>\n\n\n\n

          \u6211\u4eec\u73b0\u5728\u91c7\u7528\u7b2c\u4e09\u79cd\u65b9\u5f0f\u4f5c\u4e3aACK\u6216NAK\u53d7\u635f\u540e\u901a\u4fe1\u7684\u89e3\u51b3\u65b9\u6848\uff0c\u5e76\u5728\u534f\u8bae\u4e2d\u52a0\u5165\u5206\u7ec4\u5e8f\u53f7\u5b57\u6bb5\u7528\u4e8e\u5b58\u50a8\u5206\u7ec4\u7684\u5e8f\u53f7\uff0c\u4ee5\u6b64\u89e3\u51b3\u63a5\u6536\u65b9\u7684\u5206\u7ec4\u8fa8\u8bc6\u95ee\u9898\u3002<\/p>\n\n\n\n

          \"\"
          rdt2.1 \u53d1\u9001\u7aef<\/figcaption><\/figure>\n\n\n\n
          \"\"
          rdt2.1 \u63a5\u6536\u7aef<\/figcaption><\/figure>\n\n\n\n

          \u534f\u8baerdt2.1\u4f7f\u7528\u4e86\u4ece\u63a5\u6536\u65b9\u5230\u53d1\u9001\u65b9\u7684\u80af\u5b9a\u786e\u8ba4\u548c\u5426\u5b9a\u786e\u8ba4\u3002\u5f53\u63a5\u6536\u5230\u65f6\u5e8f\u7684\u5206\u7ec4\u65f6\uff0c\u63a5\u6536\u65b9\u5bf9\u6240\u63a5\u6536\u7684\u5206\u7ec4\u53d1\u9001\u4e00\u4e2a\u80af\u5b9a\u786e\u8ba4\u3002\u5982\u679c\u6536\u5230\u53d7\u635f\u7684\u5206\u7ec4\uff0c\u5219\u63a5\u6536\u65b9\u5c06\u53d1\u9001\u4e00\u4e2a\u5426\u5b9a\u786e\u8ba4\u3002\u5982\u679c\u4e0d\u53d1\u9001NAK\uff0c\u800c\u662f\u5bf9\u4e0a\u6b21\u6b63\u786e\u63a5\u6536\u7684\u5206\u7ec4\u53d1\u9001\u4e00\u4e2aACK\uff0c\u6211\u4eec\u4e5f\u80fd\u5b9e\u73b0\u4e0eNAK\u4e00\u6837\u7684\u6548\u679c\u3002\u53d1\u9001\u65b9\u63a5\u6536\u5230\u5bf9\u540c\u4e00\u4e2a\u5206\u7ec4\u7684\u4e24\u4e2aACK\uff08\u5373\u63a5\u6536\u5197\u4f59ACK\uff09\u540e\uff0c\u5c31\u77e5\u9053\u63a5\u6536\u65b9\u6ca1\u6709\u6b63\u786e\u63a5\u6536\u5230\u8ddf\u5728\u88ab\u786e\u8ba4\u4e24\u6b21\u7684\u5206\u7ec4\u540e\u9762\u7684\u5206\u7ec4\u3002rdt2.2\u662f\u5728\u6709\u6bd4\u7279\u5dee\u9519\u4fe1\u9053\u4e0a\u65f6\u6548\u5185\u7684\u4e00\u4e2a\u65e0NAK\u7684\u53ef\u9760\u6570\u636e\u4f20\u8f93\u534f\u8bae\u3002<\/p>\n\n\n\n

          \"\"
          rdt2.2 \u53d1\u9001\u65b9<\/figcaption><\/figure>\n\n\n\n
          \"\"
          rdt2.2 \u63a5\u6536\u7aef<\/figcaption><\/figure>\n\n\n\n

          \u7ecf\u5177\u6709\u6bd4\u7279\u5dee\u9519\u548c\u4e22\u5305\u4fe1\u9053\u7684\u53ef\u9760\u6570\u636e\u4f20\u8f93\uff1ardt3.0<\/h4>\n\n\n\n

          \u8be5\u573a\u666f\u4e0b\uff0c\u5e95\u5c42\u4fe1\u9053\u4e0d\u5149\u53ef\u80fd\u4f1a\u4ea7\u751f\u6bd4\u7279\u5dee\u9519\uff0c\u8fd8\u53ef\u80fd\u4f1a\u4ea7\u751f\u4e22\u5305\u3002\u73b0\u5728\u534f\u8bae\u5fc5\u987b\u89e3\u51b3\u4e24\u4e2a\u95ee\u9898\uff0c\u4e00\u4e2a\u662f\u68c0\u6d4b\u4e22\u5305\uff0c\u518d\u4e00\u4e2a\u662f\u5728\u53d1\u751f\u4e22\u5305\u540e\u8be5\u505a\u4e9b\u4ec0\u4e48\u8fdb\u884c\u5904\u7406\u3002<\/p>\n\n\n\n

          \u6211\u4eec\u8ba9\u53d1\u9001\u65b9\u8d1f\u8d23\u68c0\u6d4b\u548c\u6062\u590d\u4e22\u5305\u3002\u4e22\u5305\u53ef\u4ee5\u5927\u4f53\u5206\u4e3a\u4e24\u79cd\u60c5\u51b5\u4e00\u79cd\u662f\u53d1\u9001\u65b9\u7684\u53d1\u9001\u5206\u7ec4\u4e22\u5931\uff0c\u4e00\u79cd\u662f\u63a5\u6536\u65b9\u54cd\u5e94\u7684\u5206\u7ec4\u4e22\u5931\uff0c\u4e0d\u7ba1\u54ea\u79cd\u60c5\u51b5\u90fd\u4f1a\u9020\u6210\u53d1\u9001\u65b9\u65e0\u6cd5\u8fdb\u884c\u540e\u7eed\u5e94\u7b54\u7684\u540e\u679c\uff0c\u6211\u4eec\u5982\u4f55\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\u5462\uff1f\u6bd4\u8f83\u666e\u904d\u7684\u89e3\u51b3\u65b9\u5f0f\u5c31\u662f\u901a\u8fc7\u7b49\u5f85\u8db3\u591f\u957f\u7684\u65f6\u95f4\u6765\u786e\u5b9a\u5206\u7ec4\u5df2\u7ecf\u4e22\u5931\uff0c\u5e76\u5728\u786e\u5b9a\u4e22\u5931\u540e\u91cd\u4f20\u5206\u7ec4<\/em><\/strong>\u3002\u57fa\u4e8e\u8fd9\u79cd\u89e3\u51b3\u65b9\u5f0f\uff0c\u6211\u4eec\u5728\u53d1\u9001\u65b9\u6570\u636e\u4f20\u8f93\u65f6\u52a0\u5165\u5b9a\u65f6\u5668\u8fdb\u884c\u8ba1\u65f6\uff0c\u5f53\u8ba1\u65f6\u65f6\u95f4\u5230\u65f6\uff0c\u5982\u679c\u6ca1\u6536\u5230\u54cd\u5e94\u5206\u7ec4\u5219\u4f1a\u8fdb\u884c\u91cd\u4f20\u3002<\/p>\n\n\n\n

          \u6ce8\u610f\u4e00\u70b9\uff0c\u6709\u53ef\u80fd\u4f1a\u51fa\u73b0\u53d1\u9001\u65b9\u6536\u5230\u54cd\u5e94\u5206\u7ec4\u7684\u65f6\u5ef6\u957f\u4e8e\u5b9a\u65f6\u65f6\u5ef6\u7684\u60c5\u51b5\uff0c\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u53d1\u9001\u65b9\u63a5\u6536\u5230\u54cd\u5e94\u5206\u7ec4\u524d\uff0c\u5b9a\u65f6\u5668\u5230\u65f6\u4e4b\u540e\uff0c\u4ecd\u4f1a\u53d1\u9001\u91cd\u4f20\u5206\u7ec4\uff0c\u8fd9\u65f6\u5c31\u4f1a\u4ea7\u751f\u5197\u4f59\u5206\u7ec4<\/em><\/strong>\uff0c\u8fd9\u91cc\u5197\u4f59\u5206\u7ec4\u7684\u95ee\u9898\u53ef\u4ee5\u6cbf\u7528rdt2.2\u7684\u5197\u4f59\u5206\u7ec4\u89e3\u51b3\u65b9\u6848\u8fdb\u884c\u6709\u6548\u5904\u7406\u3002<\/p>\n\n\n\n

          \"\"
          rdt3.0 \u53d1\u9001\u65b9<\/figcaption><\/figure>\n\n\n\n
          \"\"
          rdt3.0 \u63a5\u6536\u65b9<\/figcaption><\/figure>\n\n\n\n

          \u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u65f6\u5e8f\u56fe\u89c2\u5bdf\u5230\u534f\u8bae3.0\u5728\u4e00\u822c\u60c5\u51b5\u4e0b\u3001\u6709\u5206\u7ec4\u4e22\u5305\u60c5\u51b5\u548c\u8fc7\u65e9\u8d85\u65f6\u60c5\u51b5\u4e0b\u7684\u8fd0\u4f5c\u60c5\u51b5\u3002<\/p>\n\n\n

          \n
          \"\"
          \u65e0\u4e22\u5305\u64cd\u4f5c<\/figcaption><\/figure>\n<\/div>\n\n
          \n
          \"\"
          \u5206\u7ec4\u4e22\u5931<\/figcaption><\/figure>\n<\/div>\n\n
          \n
          \"\"
          \u4e22\u5931ACK<\/figcaption><\/figure>\n<\/div>\n\n
          \n
          \"\"
          \u8fc7\u65e9\u8d85\u65f6<\/figcaption><\/figure>\n<\/div>\n\n\n

          \u6d41\u6c34\u7ebf\u53ef\u9760\u6570\u636e\u4f20\u8f93\uff1ardt4.0<\/h4>\n\n\n\n

          rdt3.0\u662f\u4e00\u4e2a\u529f\u80fd\u6b63\u786e\u7684\u534f\u8bae\uff0c\u4f46\u662f\u6027\u80fd\u4e0a\u5e76\u4e0d\u80fd\u4ee4\u4eba\u6ee1\u610f\uff0c\u539f\u56e0\u5728\u4e8e\u5b83\u662f\u4e00\u4e2a\u505c\u7b49\u534f\u8bae\u3002\u505c\u7b49\u534f\u8bae\u987e\u540d\u601d\u4e49\uff0c\u4f1a\u5728\u53d1\u9001\u5b8c\u4e00\u4e2a\u5206\u7ec4\u540e\u505c\u4e0b\u6765\u7b49\u5f85\uff0c\u76f4\u5230\u786e\u8ba4\u63a5\u6536\u65b9\u6536\u5230\u5206\u7ec4\u540e\u624d\u4f1a\u53d1\u9001\u540e\u7eed\u7684\u5206\u7ec4\u3002\u56e0\u4e3a\u53d1\u9001\u4e00\u4e2a\u5206\u7ec4\u540e\u9700\u8981\u7b49\u5f85\u4e00\u4e2a\u5f80\u8fd4\u65f6\u5ef6\uff0c\u4fe1\u9053\u5229\u7528\u7387\u4f4e\uff0c\u6240\u4ee5\u6211\u4eec\u6539\u7528\u6d41\u6c34\u7ebf<\/em><\/strong>\u7684\u65b9\u5f0f\u53d1\u9001\u5206\u7ec4\u3002\u800c\u91c7\u7528\u6d41\u6c34\u7ebf\u65b9\u5f0f\u8fdb\u884c\u901a\u8baf\u8ba9\u6211\u4eec\u4e0d\u5f97\u4e0d\u5bf9\u4e4b\u524d\u7684\u534f\u8bae\u505a\u4e00\u4e9b\u6539\u8fdb\uff1a<\/p>\n\n\n\n

            \n
          1. \u589e\u52a0\u5e8f\u53f7\u8303\u56f4\u3002\u56e0\u4e3a\u6bcf\u4e2a\u8f93\u9001\u4e2d\u7684\u5206\u7ec4\u5fc5\u987b\u6709\u4e00\u4e2a\u552f\u4e00\u7684\u5e8f\u53f7\uff0c\u8ba9\u5206\u7ec4\u7684\u63a5\u6536\u548c\u786e\u8ba4\u4e0d\u81f3\u4e8e\u4ea7\u751f\u7d0a\u4e71\u3002<\/li>\n\n\n\n
          2. \u534f\u8bae\u7684\u53d1\u9001\u65b9\u548c\u63a5\u6536\u65b9\u4e24\u7aef\u4e5f\u8bb8\u4e0d\u5f97\u4e0d\u7f13\u5b58\u591a\u4e2a\u5206\u7ec4\u3002<\/li>\n\n\n\n
          3. \u6240\u9700\u5e8f\u53f7\u8303\u56f4\u548c\u5bf9\u7f13\u51b2\u7684\u8981\u6c42\u53d6\u51b3\u4e8e\u6570\u636e\u4f20\u8f93\u534f\u8bae\u5982\u4f55\u5904\u7406\u4e22\u5931\u3001\u635f\u574f\u53ca\u5ef6\u65f6\u8fc7\u5927\u7684\u5206\u7ec4\u3002\u89e3\u51b3\u6d41\u6c34\u7ebf\u7684\u5dee\u9519\u6062\u590d\u6709\u4e24\u79cd\u57fa\u672c\u65b9\u6cd5\u662f\uff1a\u56de\u9000N\u6b65\u548c\u9009\u62e9\u91cd\u4f20<\/li>\n<\/ol>\n\n\n\n

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            \"\"
            \u5728GBN\u4e2d\u53d1\u9001\u65b9\u770b\u5230\u7684\u5e8f\u53f7<\/figcaption><\/figure>\n\n\n\n
            \u56de\u9000N\u6b65<\/h5>\n\n\n\n

            \u901a\u8fc7\u4e0b\u5217\u56fe\u6211\u4eec\u5c06\u770b\u5230GBN\u662f\u5982\u4f55\u8fd0\u4f5c\u7684\u3002<\/p>\n\n\n\n

            \"\"
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            \u9009\u62e9\u91cd\u4f20<\/h5>\n\n\n\n

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            \"\"
            \u9075\u5faaSR\u534f\u8bae\u5206\u7ec4\u901a\u4fe1<\/figcaption><\/figure>\n\n\n\n

            \u6d41\u91cf\u63a7\u5236<\/h3>\n\n\n\n

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            \u62e5\u585e\u63a7\u5236<\/h3>\n\n\n\n

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            \u62e5\u585e\u63a7\u5236\u65b9\u6cd5<\/h4>\n\n\n\n

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              \n
            • \u7aef\u5230\u7aef\u62e5\u585e\u63a7\u5236\u3002\u5728\u7aef\u5230\u7aef\u62e5\u585e\u63a7\u5236\u65b9\u6cd5\u4e2d\uff0c\u7f51\u7edc\u5c42\u6ca1\u6709\u4e3a\u8fd0\u8f93\u5c42\u62e5\u585e\u63a7\u5236\u63d0\u4f9b\u663e\u793a\u652f\u6301\u3002\u5373\u4f7f\u7f51\u7edc\u4e2d\u5b58\u5728\u62e5\u585e\uff0c\u7aef\u7cfb\u7edf\u4e5f\u5fc5\u987b\u901a\u8fc7\u5bf9\u7f51\u7edc\u884c\u4e3a\u7684\u89c2\u5bdf\u6765\u63a8\u65ad\u4e4b\u3002<\/li>\n\n\n\n
            • \u7f51\u7edc\u8f85\u52a9\u7684\u62e5\u585e\u63a7\u5236\u3002\u5728\u7f51\u7edc\u8f85\u52a9\u7684\u62e5\u585e\u63a7\u5236\u4e2d\uff0c\u8def\u7531\u5668\u5411\u53d1\u9001\u65b9\u63d0\u4f9b\u5173\u4e8e\u7f51\u7edc\u4e2d\u62e5\u585e\u72b6\u6001\u7684\u663e\u5f0f\u53cd\u9988\u4fe1\u606f\u3002<\/li>\n<\/ul>\n\n\n\n

              \u8fd0\u8f93\u5c42\u534f\u8bae<\/h2>\n\n\n\n

              \u65e0\u8fde\u63a5\u8fd0\u8f93\u5c42\u534f\u8bae\uff1aUDP<\/h3>\n\n\n\n

              UDP\u76f8\u8f83\u4e8eTCP\u6709\u4ee5\u4e0b\u7279\u70b9\uff1a<\/p>\n\n\n\n

                \n
              • \u5173\u4e8e\u53d1\u9001\u4ec0\u4e48\u6570\u636e\u4ee5\u53ca\u4f55\u65f6\u53d1\u9001\u7684\u5e94\u7528\u5c42\u63a7\u5236\u66f4\u4e3a\u7cbe\u7ec6\u3002\u91c7\u7528UDP\u65f6\uff0c\u53ea\u8981\u5e94\u7528\u8fdb\u7a0b\u5c06\u6570\u636e\u4f20\u9012\u7ed9UDP\uff0cUDP\u5c31\u4f1a\u5c06\u6b64\u6570\u636e\u6253\u5305\u8fdbUDP\u62a5\u6587\u6bb5\u5e76\u7acb\u5373\u5c06\u5176\u4f20\u9012\u7ed9\u7f51\u7edc\u5c42\u3002<\/li>\n\n\n\n
              • \u65e0\u9700\u5efa\u7acb\u8fde\u63a5\u3002TCP\u5728\u4f20\u8f93\u6570\u636e\u4e4b\u524d\u9700\u8981\u7ecf\u8fc7\u4e09\u6b21\u63e1\u624b\u3002UDP\u5219\u4e0d\u9700\u8981\u4efb\u4f55\u51c6\u5907\u5373\u53ef\u8fdb\u884c\u6570\u636e\u4f20\u8f93\u3002\u56e0\u6b64UDP\u4e0d\u4f1a\u5f15\u5165\u5efa\u7acb\u8fde\u63a5\u7684\u65f6\u5ef6\u3002<\/li>\n\n\n\n
              • \u65e0\u8fde\u63a5\u72b6\u6001\u3002TCP\u9700\u8981\u5728\u7aef\u7cfb\u7edf\u4e2d\u7ef4\u62a4\u8fde\u63a5\u72b6\u6001\u3002\u6b64\u94fe\u63a5\u72b6\u6001\u5305\u62ec\u63a5\u6536\u548c\u53d1\u9001\u7f13\u5b58\u3001\u62e5\u585e\u63a7\u5236\u53c2\u6570\u4ee5\u53ca\u5e8f\u53f7\u4e0e\u786e\u8ba4\u53f7\u7684\u53c2\u6570\u3002\u53e6\u4e00\u65b9\u9762\uff0cUDP\u4e0d\u7ef4\u62a4\u8fde\u63a5\u72b6\u6001\uff0c\u4e5f\u4e0d\u8ddf\u8e2a\u8fd9\u4e9b\u53c2\u6570\u3002\u56e0\u6b64\uff0c\u67d0\u4e9b\u4e13\u95e8\u7528\u4e8e\u67d0\u79cd\u7279\u5b9a\u5e94\u7528\u7684\u670d\u52a1\u5668\u5f53\u5e94\u7528\u7a0b\u5e8f\u8fd0\u884c\u5728UDP\u4e4b\u4e0a\u800c\u4e0d\u662fTCP\u4e4b\u4e0a\u65f6\uff0c\u4e00\u822c\u90fd\u80fd\u652f\u6301\u66f4\u591a\u7684\u6d3b\u8dc3\u7528\u6237\u3002<\/li>\n\n\n\n
              • \u5206\u7ec4\u9996\u90e8\u5f00\u9500\u5c0f\u3002\u6bcf\u4e2aTCP\u62a5\u6587\u6bb5\u90fd\u670920\u5b57\u8282\u7684\u9996\u90e8\u5f00\u9500\uff0c\u800cUDP\u4ec5\u67098\u5b57\u8282\u7684\u5f00\u9500<\/li>\n<\/ul>\n\n\n\n
                \"\"
                \u6d41\u884c\u7684\u56e0\u7279\u7f51\u5e94\u7528\u53ca\u5176\u4e0b\u9762\u7684\u8fd0\u8f93\u5c42\u534f\u8bae<\/figcaption><\/figure>\n\n\n\n

                UDP\u62a5\u6587\u7ed3\u6784<\/h4>\n\n\n
                \n
                \"\"
                UDP\u62a5\u6587\u6bb5\u7ed3\u6784<\/figcaption><\/figure>\n<\/div>\n\n\n

                \u9762\u5411\u8fde\u63a5\u7684\u8fd0\u8f93\uff1aTCP<\/h3>\n\n\n\n

                TCP\u62a5\u6587\u6bb5\u7ed3\u6784<\/h4>\n\n\n
                \n
                \"\"
                TCP\u62a5\u6587\u6bb5\u7ed3\u6784<\/figcaption><\/figure>\n<\/div>\n\n\n
                  \n
                • \u6e90\u7aef\u53e3\u53f7\u548c\u76ee\u7684\u7aef\u53e3\u53f7\u3002\u88ab\u7528\u4e8e\u591a\u8def\u590d\u7528\u6216\u5206\u89e3\u6765\u81ea\u6216\u65b9\u6cd5\u9001\u7ed9\u4e0a\u5c42\u5e94\u7528\u7684\u6570\u636e\u3002<\/li>\n\n\n\n
                • 32\u6bd4\u7279\u5e8f\u53f7\u5b57\u6bb5\u548c32\u6bd4\u7279\u7684\u786e\u8ba4\u53f7\u5b57\u6bb5\u3002\u8fd9\u4e9b\u5b57\u6bb5\u88abTCP\u53d1\u9001\u65b9\u548c\u63a5\u6536\u65b9\u7528\u6765\u5b9e\u73b0\u53ef\u9760\u6570\u636e\u4f20\u8f93\u670d\u52a1\u3002<\/li>\n\n\n\n
                • 4\u6bd4\u7279\u7684\u9996\u90e8\u957f\u5ea6\u5b57\u6bb5\u3002\u8be5\u5b57\u6bb5\u6307\u793a\u4e86\u4ee532\u6bd4\u7279\u7684\u5b57\u4e3a\u5355\u4f4d\u7684TCP\u9996\u90e8\u957f\u5ea6\u3002<\/li>\n\n\n\n
                • 8\u6bd4\u7279\u7684\u6807\u5fd7\u5b57\u6bb5\u3002ACK\u6bd4\u7279\u7528\u4e8e\u6307\u793a\u786e\u8ba4\u5b57\u6bb5\u4e2d\u7684\u503c\u662f\u6709\u6548\u7684\uff0c\u5373\u8be5\u62a5\u6587\u6bb5\u5305\u62ec\u4e00\u4e2a\u5bf9\u5df2\u88ab\u6210\u529f\u63a5\u6536\u62a5\u6587\u6bb5\u7684\u786e\u8ba4\u3002RST\u3001SYN\u548cFIN\u6bd4\u7279\u7528\u4e8e\u8fde\u63a5\u5efa\u7acb\u548c\u62c6\u9664\u3002\u62e5\u585e\u63a7\u5236\u4e2d\u4f7f\u7528\u4e86CWR\u548cECE\u3002\u5f53PSH\u6bd4\u7279\u88ab\u7f6e\u4f4d\u65f6\uff0c\u5c31\u53ea\u662f\u63a5\u6536\u65b9\u5e94\u7acb\u5373\u5c06\u6570\u636e\u4ea4\u7ed9\u4e0a\u5c42\u3002\u6700\u540e\uff0cURG\u6bd4\u7279\u7528\u6765\u6307\u793a\u62a5\u6587\u6bb5\u91cc\u5b58\u5728\u7740\u88ab\u53d1\u9001\u7aef\u7684\u4e0a\u5c42\u5b9e\u4f53\u7f6e\u4e3a\u201c\u7d27\u6025\u201d\u7684\u6570\u636e\u3002<\/li>\n\n\n\n
                • \u68c0\u9a8c\u548c\u5b57\u6bb5\u3002\u7528\u4e8e\u5224\u65ad\u662f\u5426\u5b58\u5728\u6bd4\u7279\u5dee\u9519\u3002<\/li>\n\n\n\n
                • 16\u6bd4\u7279\u7684\u63a5\u6536\u7a97\u53e3\u5b57\u6bb5\uff0c\u8be5\u5b57\u6bb5\u7528\u4e8e\u6d41\u91cf\u63a7\u5236\u3002<\/li>\n<\/ul>\n\n\n\n

                  TCP\u8fde\u63a5<\/h4>\n\n\n\n

                  TCP\u8fde\u63a5\u7684\u7ec4\u6210\u5305\u62ec\uff1a\u4e00\u53f0\u4e3b\u673a\u4e0a\u7684\u7f13\u5b58\u3001\u53d8\u91cf\u548c\u4e0e\u8fdb\u7a0b\u8fde\u63a5\u7684\u5957\u63a5\u5b57\u3001\u4ee5\u53ca\u53e6\u4e00\u53f0\u4e3b\u673a\u4e0a\u7684\u53e6\u4e00\u4e2a\u7f13\u5b58\u3001\u53d8\u91cf\u548c\u4e0e\u8fdb\u7a0b\u8fde\u63a5\u7684\u5957\u63a5\u5b57\u3002<\/p>\n\n\n\n

                  TCP\u8fde\u63a5\u6709\u4e00\u4e0b\u7279\u70b9\uff1a<\/p>\n\n\n\n

                    \n
                  1. TCP\u8fde\u63a5\u662f\u4e00\u6761\u903b\u8f91\u8fde\u63a5\uff0c\u800c\u4e0d\u662f\u4e00\u6761\u7269\u7406\u8fde\u63a5\u3002\u4e4b\u6240\u4ee5\u79f0\u4e3a\u8fde\u63a5\u662f\u56e0\u4e3a\u5b83\u5728\u4e00\u6bb5\u65f6\u95f4\u5185\u7ef4\u7cfb\u4e86\u53d1\u9001\u65b9\u548c\u63a5\u6536\u65b9\u4e4b\u95f4\u7279\u5b9a\u8fdb\u7a0b\u95f4\u7684\u901a\u4fe1\uff0c\u5e76\u4e14\u662f\u901a\u8fc7\u4fdd\u7559\u5728\u4e24\u4e2a\u901a\u4fe1\u7aef\u7cfb\u7edf\u4e2d\u7684\u5171\u4eab\u72b6\u6001\u5b57\u6bb5\u6765\u5b9e\u73b0\u7684\uff0c\u6240\u4ee5\u662f\u903b\u8f91\u4e0a\u7684\u3002<\/li>\n\n\n\n
                  2. TCP\u8fde\u63a5\u63d0\u4f9b\u5168\u53cc\u5de5\u670d\u52a1\u3002\u5141\u8bb8\u4e24\u4e2a\u65b9\u5411\u4e0a\u540c\u65f6\u4f20\u8f93\uff0c\u5373\u53ef\u4ee5\u5728\u53d1\u9001\u65b9\u4f20\u8f93\u6570\u636e\u7ed9\u63a5\u6536\u65b9\u7684\u540c\u65f6\uff0c\u63a5\u6536\u65b9\u4f20\u8f93\u6570\u636e\u7ed9\u53d1\u9001\u65b9\u3002<\/li>\n\n\n\n
                  3. TCP\u8fde\u63a5\u662f\u70b9\u5bf9\u70b9\u7684\u3002<\/li>\n<\/ol>\n\n\n\n

                    \u5728\u6574\u4e2aTCP\u8fde\u63a5\u4e2d\u6211\u4eec\u4e00\u822c\u4f1a\u7ecf\u5386\u4e09\u4e2a\u9636\u6bb5\uff0c\u5206\u522b\u662f\uff1aTCP\u8fde\u63a5\u5efa\u7acb\u9636\u6bb5\uff0cTCP\u8fde\u63a5\u6570\u636e\u901a\u4fe1\u9636\u6bb5\uff0cTCP\u8fde\u63a5\u62c6\u9664\u9636\u6bb5\u3002<\/p>\n\n\n\n

                    TCP\u8fde\u63a5\u5efa\u7acb\uff1a\u4e09\u6b21\u63e1\u624b<\/h5>\n\n\n\n

                    \u5728\u901a\u8fc7TCP\u8fde\u63a5\u4f20\u8f93\u6570\u636e\u4e4b\u524d\uff0c\u9700\u8981\u8fdb\u884cTCP\u8fde\u63a5\u7684\u5efa\u7acb\uff0c\u800c\u5efa\u7acb\u8fde\u63a5\u7684\u8fc7\u7a0b\u4e5f\u5c31\u662f\u6211\u4eec\u5e38\u8bf4\u7684\u201c\u4e09\u6b21\u63e1\u624b\u201d\uff0c\u4e3b\u8981\u5305\u62ec\u4ee5\u4e0b\u51e0\u4e2a\u6b65\u9aa4\uff1a<\/p>\n\n\n\n

                      \n
                    • \u7b2c\u4e00\u6b65\uff1a\u53d1\u9001\u8fde\u63a5\u8bf7\u6c42\u3002\u5ba2\u6237\u7aef\u7684TCP\u4f1a\u5411\u670d\u52a1\u7aef\u7684TCP\u53d1\u9001\u4e00\u4e2a\u7279\u6b8a\u62a5\u6587\uff0c\u8be5\u62a5\u6587\u7684SYN\u6807\u5fd7\u4f4d\u88ab\u7f6e\u4e3a1\uff0c\u4e0d\u5305\u542b\u5e94\u7528\u5c42\u6570\u636e\uff0c\u6240\u4ee5\u88ab\u79f0\u4e3aSYN\u62a5\u6587\u6bb5\u3002\u53e6\u5916\u5ba2\u6237\u4f1a\u968f\u673a\u5730\u9009\u62e9\u4e00\u4e2a\u521d\u59cb\u5e8f\u53f7\uff0c\u5e76\u5c06\u5176\u653e\u5728TCP\u7684\u5e8f\u53f7\u5b57\u6bb5\u4e2d\u3002<\/li>\n\n\n\n
                    • \u7b2c\u4e8c\u6b65\uff1a\u63a5\u6536\u65b9\u54cd\u5e94\u8fde\u63a5\u8bf7\u6c42\u3002\u5f53\u63a5\u6536\u65b9\u6b63\u786e\u63a5\u6536\u5230\u5ba2\u6237\u53d1\u9001\u7684\u8fde\u63a5\u8bf7\u6c42\u62a5\u6587\u6bb5\u65f6\uff0c\u4f1a\u63d0\u53d6\u51fa\u62a5\u6587\u6bb5\u5b57\u6bb5\u6570\u636e\uff0c\u5e76\u4e3a\u8be5TCP\u8fde\u63a5\u5206\u914dTCP\u7f13\u5b58\u548c\u53d8\u91cf\uff0c\u5e76\u5411\u5ba2\u6237\u53d1\u9001\u5141\u8bb8\u8fde\u63a5\u7684\u62a5\u6587\u6bb5\u3002\u5728\u6b64\u62a5\u6587\u6bb5\u4e2d\uff0cSYN\u6807\u5fd7\u4f4d\u4f9d\u7136\u88ab\u7f6e\u4e3a1\uff0c\u4e14\u786e\u8ba4\u53f7\u5b57\u6bb5\u88ab\u8d4b\u503c\u4e3aclient_isn+1\uff0c\u5e76\u4e14\u670d\u52a1\u5668TCP\u4f1a\u968f\u673a\u9009\u62e9\u4e00\u4e2a\u521d\u59cb\u5e8f\u53f7\u653e\u5728TCP\u7684\u5e8f\u53f7\u5b57\u6bb5\u4e2d\uff0c\u4e14\u4ecd\u7136\u4e0d\u5305\u542b\u5e94\u7528\u5c42\u6570\u636e\u3002\u8be5\u62a5\u6587\u88ab\u79f0\u4e3aSYNACK\u62a5\u6587\u6bb5\u3002<\/li>\n\n\n\n
                    • \u7b2c\u4e09\u90e8\uff1a\u5ba2\u6237\u7aef\u7aef\u54cd\u5e94\u3002\u5728\u6536\u5230SYNACK\u62a5\u6587\u6bb5\u540e\uff0c\u5ba2\u6237\u4e5f\u8981\u7ed9\u8be5\u8fde\u63a5\u5206\u914d\u7f13\u5b58\u548c\u53d8\u91cf\u3002\u5ba2\u6237\u4e3b\u673a\u5411\u670d\u52a1\u5668\u53d1\u9001\u4e00\u4e2a\u62a5\u6587\u6bb5\uff0c\u4ee5\u786e\u8ba4\u5176\u6536\u5230SYNACK\u62a5\u6587\u6bb5\u3002\u56e0\u4e3a\u8fde\u63a5\u5df2\u7ecf\u5efa\u7acb\u4e86\uff0c\u6240\u4ee5\u6b64\u62a5\u6587\u6bb5\u4e2dSYN\u88ab\u7f6e\u4e3a0\uff0c\u4e14\u53ef\u4ee5\u643a\u5e26\u5e94\u7528\u5c42\u8d1f\u8f7d\u3002<\/li>\n<\/ul>\n\n\n\n

                      \u53ef\u4ee5\u5c06\u4e09\u6b21\u63e1\u624b\u7684\u76ee\u7684\u7b80\u5316\u6210\u786e\u8ba4\u5bf9\u65b9\u80fd\u542c\u5230\u81ea\u5df1\u53d1\u9001\u7684\u6d88\u606f\uff0c\u53ef\u4ee5\u5c06\u4e09\u6b21\u63e1\u624b\u7684\u8fc7\u7a0b\u6bd4\u55bb\u6210\u8fd9\u6837\u4e00\u4e2a\u8fc7\u7a0b\u3002\u5f53\u4f60\u5728\u7f51\u4e0a\u4ea4\u53cb\u8f6f\u4ef6\u4e2d\u770b\u5230\u4e86\u81ea\u5df1\u4e2d\u610f\u7684\u5f02\u6027\uff0c\u5f7c\u6b64\u6709\u4e86\u4e00\u5b9a\u4e86\u89e3\u540e\u4f60\u51b3\u5b9a\u901a\u8fc7\u7535\u8bdd\u8fdb\u884c\u66f4\u76f4\u63a5\u7684\u4ea4\u6d41\uff0c\u5047\u8bbe\u6b64\u65f6\u7684\u7535\u8bdd\u4fe1\u53f7\u4e0d\u90a3\u4e48\u5c3d\u5982\u4eba\u610f\uff0c\u9996\u5148\u4f60\u4f1a\u9700\u8981\u6253\u7535\u8bdd\u7ed9\u5979\uff0c\u73b0\u5728\u7535\u8bdd\u63a5\u901a\u4e86\uff0c\u201c\u5582\uff0c\u4f60\u597d\uff0c\u542c\u5f97\u5230\u5417\uff1f\u201d\uff08\u7b2c\u4e00\u6b21\u63e1\u624b\uff09\uff0c\u201c\u4f60\u597d\uff0c\u6211\u80fd\u542c\u5230\u4f60\u8bf4\u8bdd\uff0c\u4f60\u80fd\u542c\u5230\u6211\u8bf4\u8bdd\u5417\uff1f\u201d\uff08\u7b2c\u4e8c\u6b21\u63e1\u624b\uff09\uff0c\u201c\u53ef\u4ee5\u7684\uff0c\u6211\u53ef\u4ee5\u542c\u5230\u4f60\u8bf4\u8bdd\u201d\uff08\u7b2c\u4e09\u6b21\u63e1\u624b\uff09\uff0c\u5728\u901a\u8fc7\u795e\u5947\u7684\u4e09\u6b21\u63e1\u624b\u540e\u4f60\u4eec\u5c31\u80fd\u6109\u5feb\u7684\u4ea4\u6d41\u4e86\u3002<\/p>\n\n\n\n

                      TCP\u8fde\u63a5\u540e\u7684\u6570\u636e\u901a\u4fe1<\/h5>\n\n\n\n
                      \"\"
                      TCP\u53d1\u9001\u7f13\u5b58\u548c\u63a5\u6536\u7f13\u5b58<\/figcaption><\/figure>\n\n\n\n

                      \u4e00\u65e6\u5efa\u7acb\u8fde\u63a5\uff0c\u4e24\u4e2a\u5e94\u7528\u8fdb\u7a0b\u95f4\u5c31\u80fd\u4e92\u76f8\u53d1\u9001\u6570\u636e\u4e86\u3002\u6211\u4eec\u8003\u8651\u5ba2\u6237\u548c\u670d\u52a1\u5668\u6570\u636e\u4ea4\u4e92\u7684\u573a\u666f\u3002\u9996\u5148\u5ba2\u6237\u4f1a\u901a\u8fc7\u5957\u63a5\u5b57\u5c06\u6570\u636e\u4f20\u9012\u7ed9\u5ba2\u6237\u7aef\u7684TCP\uff0cTCP\u5c06\u8fd9\u4e9b\u6570\u636e\u5f15\u5bfc\u5230\u8be5\u8fde\u63a5\u7684\u53d1\u9001\u7f13\u5b58\uff08\u4e09\u6b21\u63e1\u624b\u4e2d\u521d\u59cb\u5316\u7684\uff09\u4e2d\uff0c\u5f53\u8981\u53d1\u9001\u6570\u636e\u65f6\uff0cTCP\u4f1a\u4e3a\u6bcf\u5757\u5ba2\u6237\u6570\u636e\u914d\u4e0a\u4e00\u4e2aTCP\u9996\u90e8\uff0c\u4ece\u800c\u5f62\u6210\u591a\u4e2aTCP\u62a5\u6587\u6bb5\u3002\u62a5\u6587\u6bb5\u4f1a\u4ea4\u7531\u7f51\u7edc\u5c42\u8fdb\u884c\u540e\u7eed\u5305\u88c5\u548c\u53d1\u9001\u3002\u5f53\u63a5\u6536\u65b9\u6536\u5230TCP\u62a5\u6587\u6bb5\u540e\uff0c\u4f1a\u5c06\u62a5\u6587\u6bb5\u4e2d\u7684\u6570\u636e\u7f13\u5b58\u5728\u8be5TCP\u8fde\u63a5\u7684\u63a5\u6536\u7f13\u5b58\u4e2d\uff0c\u5e94\u7528\u7a0b\u5e8f\u4ece\u6b64\u7f13\u5b58\u4e2d\u8bfb\u53d6\u6570\u636e\u6d41\u3002\u8be5\u8fde\u63a5\u7684\u6bcf\u4e00\u7aef\u90fd\u6709\u683c\u5b50\u7684\u53d1\u9001\u7f13\u5b58\u548c\u63a5\u6536\u7f13\u5b58\u3002<\/p>\n\n\n\n

                      TCP\u8fde\u63a5\u5173\u95ed\uff1a\u56db\u6b21\u6325\u624b<\/h5>\n\n\n\n

                      \u56db\u6b21\u6325\u624b\u76f8\u5bf9\u4e8e\u4e09\u6b21\u63e1\u624b\u66f4\u4e3a\u7b80\u5355\u3002\u5f53\u5ba2\u6237\u8981\u5173\u95ed\u8fde\u63a5\u65f6\uff0c\u5b83\u4f1a\u53d1\u9001\u4e00\u4e2aFIN\u6bd4\u7279\u7f6e\u4f4d\u4e3a1\u7684\u7ec8\u6b62\u8bf7\u6c42\u62a5\u6587\u6bb5\u7ed9\u670d\u52a1\u7aef\uff0c\u5e76\u540c\u65f6\u5173\u95ed\u5ba2\u6237\u7aef\u5411\u670d\u52a1\u7aef\u7684\u6570\u636e\u4f20\u8f93\uff0c\u5f53\u670d\u52a1\u7aef\u6536\u5230FIN\u62a5\u6587\u6bb5\u540e\uff0c\u4f1a\u8fd4\u56de\u4e00\u4e2a\u786e\u8ba4\u62a5\u6587\u3002\u540c\u6837\u670d\u52a1\u7aef\u4e5f\u4f1a\u53d1\u9001\u4e00\u4e2a\u81ea\u5df1\u7684\u7ec8\u6b62\u62a5\u6587\u6bb5\u7ed9\u5ba2\u6237\uff0cFIN\u6bd4\u7279\u7f6e\u4f4d\u4e3a1\uff0c\u5e76\u540c\u65f6\u5173\u95ed\u670d\u52a1\u7aef\u5411\u5ba2\u6237\u7684\u6570\u636e\u4f20\u9001\uff0c\u5ba2\u6237\u6536\u5230\u670d\u52a1\u7aef\u7684\u7ec8\u6b62\u62a5\u6587\u540e\u4f1a\u8fd4\u56de\u4e00\u4e2a\u786e\u8ba4\u62a5\u6587\uff0c\u6b64\u65f6\uff0c\u8fd9\u4e24\u53f0\u4e3b\u673a\u4e0a\u7528\u4e8e\u8be5\u8fde\u63a5\u7684\u6240\u6709\u8d44\u6e90\u90fd\u88ab\u91ca\u653e\u4e86\u3002<\/p>\n\n\n\n

                      TCP\u6d41\u91cf\u63a7\u5236<\/h4>\n\n\n\n

                      \u4e00\u6761TCP\u8fde\u63a5\u7684\u6bcf\u4e00\u4fa7\u90fd\u4e3a\u8be5\u8fde\u63a5\u8bbe\u7f6e\u4e86\u63a5\u6536\u7f13\u5b58\u3002\u5f53TCP\u8fde\u63a5\u6536\u5230\u6b63\u786e\u6309\u5e8f\u7684\u5b57\u8282\u540e\uff0c\u5b83\u5c31\u5c06\u6570\u636e\u653e\u5165\u63a5\u6536\u7f13\u5b58\u3002\u4f46\u662f\u53ea\u6709\u5f53\u4e0a\u5c42\u5e94\u7528\u5904\u4e8e\u7b49\u5f85\u63a5\u6536\u7f13\u5b58\u7684\u72b6\u6001\u65f6\u624d\u80fd\u8bfb\u53d6\u7f13\u5b58\uff0c\u5982\u679c\u4e0a\u5c42\u5e94\u7528\u5904\u4e8e\u5fd9\u788c\u72b6\u6001\uff0c\u5219\u4f1a\u63a8\u8fdf\u7f13\u5b58\u7684\u8bfb\u53d6\u65f6\u95f4\u3002\u56e0\u6b64\uff0c\u5f53\u53d1\u9001\u65b9\u53d1\u9001\u901f\u7387\u8fc7\u5feb\uff0c\u63a5\u6536\u65b9\u8bfb\u53d6\u901f\u7387\u51cf\u7f13\u65f6\uff0c\u63a5\u6536\u7f13\u5b58\u4e2d\u7684\u6570\u636e\u5c06\u4f1a\u8d8a\u6765\u8d8a\u591a\uff0c\u5e76\u6700\u7ec8\u5360\u6ee1\uff0c\u8fd9\u65f6\u4ecd\u6709\u6570\u636e\u53d1\u9001\u8fc7\u6765\u5219\u4f1a\u8ba9\u7f13\u5b58\u6ea2\u51fa\uff0c\u5bfc\u81f4\u4e22\u5305\u4e8b\u4ef6\uff0c\u589e\u52a0\u4e86\u91cd\u4f20\u5206\u7ec4\u7684\u6570\u91cf\uff0c\u53d8\u76f8\u589e\u52a0\u4e86\u6bcf\u4e00\u4e2a\u5206\u7ec4\u7684\u5e73\u5747\u4ea4\u4e92\u6b21\u6570\uff0c\u589e\u52a0\u4e86\u4f20\u8f93\u4fe1\u9053\u7684\u8d1f\u8f7d\u3002\u6240\u4ee5\u4e3a\u4e86\u907f\u514d\u8fd9\u6837\u7684\u4e8b\u60c5\u53d1\u751f\uff0c\u589e\u52a0\u6d41\u91cf\u63a7\u5236\u670d\u52a1\uff0cTCP\u901a\u8fc7\u8ba9\u53d1\u9001\u65b9\u7ef4\u62a4\u4e00\u4e2a\u79f0\u4e3a\u63a5\u53d7\u7a97\u53e3\u7684\u53d8\u91cf\u6765\u63d0\u4f9b\u6d41\u91cf\u63a7\u5236\uff08\u63a5\u53d7\u7a97\u53e3\u7528\u4e8e\u544a\u8bc9\u53d1\u9001\u65b9\u63a5\u6536\u65b9\u8fd8\u6709\u591a\u5c11\u53ef\u7528\u7684\u7f13\u5b58\u7a7a\u95f4\uff09\uff0c\u800c\u53ea\u8981\u786e\u4fddlastseqnum-base<=rwnd\uff0c\u5c31\u80fd\u4fdd\u8bc1\u63a5\u53d7\u7a97\u53e3\u4e0d\u4f1a\u6ea2\u51fa\uff0c\u6240\u4ee5\u6700\u540e\u5728\u53d1\u9001\u7aef\u63a7\u5236\u53d1\u9001\u7a97\u53e3\u7684\u5927\u5c0f\u5373lastseqnum-base<=rwnd\uff0c\u6211\u4eec\u5c31\u80fd\u5b9e\u73b0TCP\u6d41\u91cf\u63a7\u5236\u3002<\/p>\n\n\n\n

                      TCP\u62e5\u585e\u63a7\u5236<\/h4>\n\n\n\n

                      TCP\u4f7f\u7528\u7684\u662f\u7aef\u5230\u7aef\u62e5\u585e\u63a7\u5236\u3002TCP\u8ba9\u6bcf\u4e00\u4e2a\u53d1\u9001\u65b9\u6839\u636e\u6240\u611f\u77e5\u5230\u7684\u7f51\u7edc\u62e5\u585e\u7a0b\u5ea6\u6765\u9650\u5236\u5176\u80fd\u5411\u8fde\u63a5\u53d1\u9001\u6d41\u91cf\u7684\u901f\u7387\uff0c\u4ee5\u6b64\u6765\u8fbe\u5230\u7aef\u5230\u7aef\u62e5\u585e\u63a7\u5236\u7684\u76ee\u7684\u3002\u4f46\u662f\u4f7f\u7528\u6b64\u65b9\u6cd5\u5b58\u5728\u4e09\u4e2a\u95ee\u9898\uff1a<\/p>\n\n\n\n

                        \n
                      1. \u4e00\u4e2aTCP\u53d1\u9001\u65b9\u5982\u4f55\u9650\u5236\u5176\u5411\u8fde\u63a5\u7684\u6d41\u91cf\u53d1\u9001\u901f\u7387<\/li>\n\n\n\n
                      2. \u53d1\u9001\u65b9\u5982\u4f55\u611f\u77e5\u8fde\u63a5\u94fe\u8def\u4e0a\u7684\u7f51\u7edc\u62e5\u585e<\/li>\n\n\n\n
                      3. \u5f53\u51fa\u73b0\u62e5\u585e\u65f6\uff0c\u91c7\u7528\u4f55\u79cd\u7b97\u6cd5\u6539\u53d8\u5176\u53d1\u9001\u901f\u7387<\/li>\n<\/ol>\n\n\n\n
                        \u4e00\u4e2aTCP\u53d1\u9001\u65b9\u5982\u4f55\u9650\u5236\u5176\u5411\u8fde\u63a5\u7684\u6d41\u91cf\u53d1\u9001\u901f\u7387<\/h5>\n\n\n\n

                        \u6211\u4eec\u77e5\u9053\u6bcf\u4e00\u7aef\u90fd\u6709\u4e00\u4e2a\u53d1\u9001\u7f13\u5b58\u548c\u63a5\u6536\u7f13\u5b58\uff0c\u4e14\u53d1\u9001\u65b9\u6709\u4e00\u4e2a\u62e5\u585e\u7a97\u53e3\uff0c\u540c\u4e00\u65f6\u95f4\u5185\u5f85\u786e\u8ba4\u7684\u5206\u7ec4\u6570\u4e0d\u4f1a\u8d85\u8fc7\u62e5\u585e\u63a7\u5236\u7a97\u53e3\u548c\u63a5\u6536\u7a97\u53e3\u7684\u5927\u5c0f\uff0c\u73b0\u5047\u8bbe\u63a5\u6536\u7a97\u53e3\u4e3a\u65e0\u9650\u5927\uff0c\u5e76\u5ffd\u7565\u53d1\u9001\u65f6\u5ef6\u548c\u4e22\u5305\uff0c\u540c\u4e00\u65f6\u95f4\u53d1\u9001\u4e00\u4e2a\u62e5\u585e\u7a97\u53e3\u5927\u5c0f\u7684\u6570\u636e\u9700\u8981\u7b49\u5f85\u4e00\u4e2a\u5f80\u8fd4\u65f6\u5ef6\u7684\u65f6\u95f4\uff08RTT\uff09\uff0c\u56e0\u6b64\uff0c\u8be5\u53d1\u9001\u65b9\u7684\u53d1\u9001\u901f\u7387\u5927\u6982\u662fcwnd\/RTT\u5b57\u8282\/\u79d2\u3002\u53ef\u4ee5\u901a\u8fc7\u8c03\u8282cwnd\u7684\u503c\uff0c\u53d1\u9001\u65b9\u56e0\u6b64\u80fd\u8c03\u6574\u5b83\u5411\u8fde\u63a5\u53d1\u9001\u6570\u636e\u7684\u901f\u7387\u3002<\/p>\n\n\n\n

                        \u53d1\u9001\u65b9\u5982\u4f55\u611f\u77e5\u8fde\u63a5\u94fe\u8def\u4e0a\u7684\u7f51\u7edc\u62e5\u585e<\/h5>\n\n\n\n

                        \u51fa\u73b0\u4e22\u5305\u4e8b\u4ef6\u5373\u8868\u793a\u5b58\u5728\u7f51\u7edc\u62e5\u585e\u3002<\/p>\n\n\n\n

                        \u5f53\u51fa\u73b0\u62e5\u585e\u65f6\uff0c\u91c7\u7528\u4f55\u79cd\u7b97\u6cd5\u6539\u53d8\u5176\u53d1\u9001\u901f\u7387<\/h5>\n\n\n\n

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                          \n
                        • \u4e00\u4e2a\u4e22\u5931\u7684\u62a5\u6587\u6bb5\u610f\u5473\u7740\u62e5\u585e\uff0c\u56e0\u6b64\u5f53\u4e22\u5931\u62a5\u6587\u6bb5\u65f6\u5e94\u5f53\u964d\u4f4eTCP\u53d1\u9001\u901f\u7387\u3002<\/li>\n\n\n\n
                        • \u4e00\u4e2a\u786e\u8ba4\u62a5\u6587\u6bb5\u8868\u793a\u8be5\u7f51\u7edc\u6b63\u786e\u5730\u4ea4\u4ed8\u4e86\u6570\u636e\uff0c\u8be5\u7f51\u7edc\u6b64\u65f6\u80fd\u6210\u529f\u4ea4\u4ed8\u62a5\u6587\u6bb5\uff0c\u6240\u4ee5\u6ca1\u6709\u62e5\u585e\u3002\u56e0\u6b64\u5f53\u6536\u5230\u786e\u8ba4\u62a5\u6587\u6bb5\u65f6\u5e94\u5f53\u589e\u52a0\u53d1\u9001\u901f\u7387\u3002<\/li>\n\n\n\n
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                          \u6162\u542f\u52a8<\/h6>\n\n\n\n

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                          \u5982\u679c\u51fa\u73b0\u4e22\u5305\uff0c\u8fd9\u65f6\u6211\u4eec\u5c06cwnd\u8bbe\u7f6e\u4e3a1MSS\uff0c\u5e76\u7ee7\u7eed\u8ba9cwnd\u6307\u6570\u589e\u957f\uff0c\u540c\u65f6\u5c06ssthresh\u8bbe\u7f6e\u4e3a\u5f53\u524dcwnd\u7684\u4e00\u534a\u3002<\/p>\n\n\n\n

                          cwnd\u5982\u679c\u6210\u529f\u589e\u957f\u5230\u6162\u542f\u52a8\u9608\u503c\uff0c\u4e4b\u540e\u5c06\u8fdb\u5165\u62e5\u585e\u907f\u514d\u9636\u6bb5\u3002<\/p>\n\n\n\n

                          \u62e5\u585e\u907f\u514d<\/h6>\n\n\n\n

                          \u8fdb\u5165\u62e5\u585e\u907f\u514d\u9636\u6bb5\uff0c\u4e00\u4e2aRTTcwnd\u5c06\u53ea\u589e\u52a0\u4e00\u4e2aMSS\u3002\u8fd9\u65f6\u5982\u679c\u51fa\u73b0\u4e22\u5305\uff0ccwnd\u5c06\u53d8\u4e3a1\u4e2aMSS\uff0c\u5e76\u5f00\u59cb\u6162\u542f\u52a8\uff0c\u540c\u65f6\u5c06ssthresh\u8bbe\u7f6e\u4e3a\u5f53\u524dcwnd\u7684\u4e00\u534a\u3002<\/p>\n\n\n\n

                          \u5feb\u901f\u6062\u590d<\/h6>\n\n\n\n

                          TCP\u65e9\u671f\u7248\u672cTCP Tahoe\u6ca1\u6709\u5feb\u901f\u6062\u590d\u9636\u6bb5\uff0c\u800cTCP\u7684\u8f83\u65b0\u7248\u672cTCP Reno\u5219\u7efc\u5408\u4e86\u5feb\u901f\u6062\u590d\u3002\u6211\u4eec\u77e5\u9053\u591a\u79cd\u60c5\u51b5\u90fd\u80fd\u88ab\u8ba4\u5b9a\u4e3a\u53d1\u751f\u4e86\u4e22\u5305\u4e8b\u4ef6\uff0c\u4e00\u79cd\u662f\u8d85\u65f6\uff0c\u5373\u6700\u5e38\u89c1\u7684\u89e6\u53d1\u4e22\u5305\u4e8b\u4ef6\u7684\u89e6\u53d1\u6761\u4ef6\uff0c\u8fd9\u79cd\u60c5\u51b5\u4e0b\u65b0\u8001\u7248\u672cTCP\u7684\u884c\u4e3a\u662f\u76f8\u540c\u7684\uff0ccwnd\u4f1a\u4ece1MSS\u5f00\u59cb\u6162\u542f\u52a8\u3002\u4f46\u662f\u5f53\u89e6\u53d1\u4e22\u5305\u4e8b\u4ef6\u7684\u662f3\u4e2a\u5197\u4f59ACK\uff0c\u65b0\u7248\u672cTCP\u7684\u7b97\u6cd5\u5219\u4e0d\u540c\uff0c\u6b64\u65f6ssthresh\u4ecd\u8bbe\u7f6e\u4e3acwnd\u7684\u4e00\u534a\uff0c\u4e4b\u540ecwnd\u5219\u53d8\u4e3assthresh+3\uff083\u4e2a\u5197\u4f59ACK\u8981\u52a0\u4e0a3\u4e2aMSS\uff09\uff0c\u5e76\u5728\u6b64\u57fa\u7840\u4e0a\u7ebf\u6027\u589e\u957f\u3002\u8fd9\u5c31\u662f\u5feb\u901f\u6062\u590d\u3002<\/p>\n\n\n\n

                          \"\"
                          TCP\u62e5\u585e\u63a7\u5236\u7684FSM\u63cf\u8ff0<\/figcaption><\/figure>\n","protected":false},"excerpt":{"rendered":"

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