{"id":35820,"date":"2023-09-17T19:26:28","date_gmt":"2023-09-17T11:26:28","guid":{"rendered":"https:\/\/www.techphant.cn\/?p=35820"},"modified":"2023-09-17T19:26:32","modified_gmt":"2023-09-17T11:26:32","slug":"pxysjdyssm","status":"publish","type":"post","link":"https:\/\/www.techphant.cn\/blog\/35820.html","title":{"rendered":"PDU\u534f\u8bae\u6570\u636e\u5355\u5143\u662f\u4ec0\u4e48\uff1f"},"content":{"rendered":"\n

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\u3000\u3000\u4e00\u3001PDU\u7684\u5b9a\u4e49<\/h2>\n\n\n\n

\u3000\u3000PDU\uff0c\u5373\u534f\u8bae\u6570\u636e\u5355\u5143\uff0c\u662f\u6307\u5728\u8ba1\u7b97\u673a\u7f51\u7edc\u4e2d\u4f20\u8f93\u7684\u6570\u636e\u5355\u5143\u3002\u5b83\u662f\u5728\u4e0d\u540c\u5c42\u6b21\u534f\u8bae\u4e2d\u4f20\u8f93\u7684\u6700\u5c0f\u6570\u636e\u5355\u5143\uff0c\u7528\u4e8e\u5728\u7f51\u7edc\u4e2d\u4f20\u9012\u4fe1\u606f\u3002PDU\u7684\u5927\u5c0f\u548c\u7ed3\u6784\u53d6\u51b3\u4e8e\u6240\u7528\u534f\u8bae\u7684\u8981\u6c42\u548c\u8bbe\u8ba1\u3002<\/strong><\/p>\n\n\n\n

\u3000\u3000\u4e8c\u3001PDU\u7684\u4f5c\u7528<\/h2>\n\n\n\n

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\u3000\u3000\u4e09\u3001PDU\u7684\u7c7b\u578b<\/h2>\n\n\n\n

\u3000\u3000PDU\u7684\u7c7b\u578b\u53ef\u4ee5\u6839\u636e\u4e0d\u540c\u7684\u7f51\u7edc\u5c42\u6b21\u534f\u8bae\u8fdb\u884c\u5212\u5206\u3002\u5728OSI\u6a21\u578b\u4e2d\uff0c\u6bcf\u4e2a\u5c42\u6b21\u7684\u534f\u8bae\u90fd\u6709\u5bf9\u5e94\u7684PDU\u7c7b\u578b\u3002\u4ee5\u4e0b\u662f\u5e38\u89c1\u7684PDU\u7c7b\u578b\uff1a<\/p>\n\n\n\n

    \n
  • \u3000\u30001. \u7269\u7406\u5c42PDU<\/strong>\uff1a\u7269\u7406\u5c42\u7684PDU\u662f\u6bd4\u7279\u6d41\uff0c\u5b83\u8d1f\u8d23\u5c06\u6570\u636e\u4ece\u4e00\u4e2a\u8282\u70b9\u4f20\u8f93\u5230\u53e6\u4e00\u4e2a\u8282\u70b9\uff0c\u6ca1\u6709\u8fdb\u884c\u4efb\u4f55\u5904\u7406\u6216\u5c01\u88c5\u3002<\/li>\n\n\n\n
  • \u3000\u30002. \u6570\u636e\u94fe\u8def\u5c42PDU<\/strong>\uff1a\u6570\u636e\u94fe\u8def\u5c42\u7684PDU\u79f0\u4e3a\u5e27(Frame)\uff0c\u5b83\u5305\u542b\u4e86\u6570\u636e\u548c\u63a7\u5236\u4fe1\u606f\uff0c\u7528\u4e8e\u5728\u76f8\u90bb\u8282\u70b9\u4e4b\u95f4\u4f20\u8f93\u6570\u636e\u3002<\/li>\n\n\n\n
  • \u3000\u30003. \u7f51\u7edc\u5c42PDU<\/strong>\uff1a\u7f51\u7edc\u5c42\u7684PDU\u79f0\u4e3a\u6570\u636e\u5305(Packet)\uff0c\u5b83\u5305\u542b\u4e86\u6e90\u548c\u76ee\u7684\u4e3b\u673a\u7684IP\u5730\u5740\u4ee5\u53ca\u5176\u4ed6\u5fc5\u8981\u7684\u4fe1\u606f\uff0c\u7528\u4e8e\u5728\u4e0d\u540c\u7f51\u7edc\u4e4b\u95f4\u4f20\u8f93\u6570\u636e\u3002<\/li>\n\n\n\n
  • \u3000\u30004. \u4f20\u8f93\u5c42PDU<\/strong>\uff1a\u4f20\u8f93\u5c42\u7684PDU\u79f0\u4e3a\u6bb5(Segment)\u6216\u7528\u6237\u6570\u636e\u62a5(User Datagram)\uff0c\u5b83\u8d1f\u8d23\u5c06\u6570\u636e\u4f20\u8f93\u5230\u76ee\u6807\u4e3b\u673a\u4e0a\u7684\u5e94\u7528\u7a0b\u5e8f\u3002<\/li>\n\n\n\n
  • \u3000\u30005. \u5e94\u7528\u5c42PDU<\/strong>\uff1a\u5e94\u7528\u5c42\u7684PDU\u79f0\u4e3a\u62a5\u6587(Message)\uff0c\u5b83\u662f\u6700\u9ad8\u5c42\u7684\u6570\u636e\u5355\u5143\uff0c\u7528\u4e8e\u5728\u5e94\u7528\u7a0b\u5e8f\u4e4b\u95f4\u4f20\u9012\u6570\u636e\u3002<\/li>\n<\/ul>\n\n\n\n

    \u3000\u3000\u56db\u3001PDU\u5728\u4e0d\u540c\u7f51\u7edc\u534f\u8bae\u4e2d\u7684\u5e94\u7528<\/h2>\n\n\n\n

    \u3000\u3000PDU\u5728\u4e0d\u540c\u7f51\u7edc\u534f\u8bae\u4e2d\u5177\u6709\u4e0d\u540c\u7684\u5e94\u7528\u3002\u5728\u4ee5\u592a\u7f51\u4e2d\uff0cPDU\u662f\u5e27\uff0c\u7528\u4e8e\u5c06\u6570\u636e\u4ece\u4e00\u4e2a\u8282\u70b9\u4f20\u8f93\u5230\u53e6\u4e00\u4e2a\u8282\u70b9\u3002\u5728IP\u534f\u8bae\u4e2d\uff0cPDU\u662f\u6570\u636e\u5305\uff0c\u7528\u4e8e\u5728\u4e0d\u540c\u7f51\u7edc\u4e4b\u95f4\u8fdb\u884c\u6570\u636e\u4f20\u8f93\u3002\u5728TCP\/IP\u534f\u8bae\u4e2d\uff0cPDU\u662f\u6bb5\u6216\u7528\u6237\u6570\u636e\u62a5\uff0c\u7528\u4e8e\u5c06\u6570\u636e\u4f20\u8f93\u5230\u76ee\u6807\u4e3b\u673a\u4e0a\u7684\u5e94\u7528\u7a0b\u5e8f\u3002\u5728HTTP\u534f\u8bae\u4e2d\uff0cPDU\u662f\u62a5\u6587\uff0c\u7528\u4e8e\u5728\u5ba2\u6237\u7aef\u548c\u670d\u52a1\u5668\u4e4b\u95f4\u4f20\u8f93\u6570\u636e\u3002<\/p>\n\n\n\n

    \u3000\u3000\u7ed3\u8bba<\/h2>\n\n\n\n

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