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      1. horo\u4fbf\u643a\u673a\u7684\u64cd\u4f5c\u7cfb\u7edf\u751f\u6210\u4e00\u4e2aDNS\u67e5\u8be2\u62a5\u6587\uff0c\u5c06\u5b57\u7b26\u4e32www.baidu.com\u653e\u5165DNS\u62a5\u6587\u7684\u95ee\u9898\u6bb5\u4e2d\u3002\u8be5DNS\u62a5\u6587\u5219\u653e\u7f6e\u5728\u4e00\u4e2a\u5177\u670953\u53f7\uff08DNS\u670d\u52a1\u5668\uff09\u76ee\u7684\u7aef\u53e3\u7684UDP\u62a5\u6587\u6bb5\u4e2d\u3002\u8be5UDP\u62a5\u6587\u6bb5\u5219\u88ab\u653e\u5165\u5177\u6709IP\u76ee\u7684\u5730\u574068.87.71.226\uff08DHCP ACK\u8fd4\u56de\u7684DNS\u670d\u52a1\u5668\u5730\u5740\uff09\u548c\u6e90IP\u5730\u574068.85.2.101\u7684IP\u6570\u636e\u62a5\u4e2d\u3002\u518d\u5c06IP\u6570\u636e\u62a5\u653e\u5165\u4ee5\u592a\u7f51\u5e27\u4e2d\uff0c\u51c6\u5907\u53d1\u7ed9\u5b66\u6821\u7684\u7f51\u5173\u8def\u7531\u5668\uff0c\u6211\u4eec\u77e5\u9053\u6e90MAC\u5730\u5740\u4e3aIP\u4fbf\u643a\u673a\u7f51\u5361MAC\u5730\u5740\uff0c\u4f46\u662f\u7f51\u5173\u8def\u7531\u5668\u7684MAC\u5730\u5740\u5e76\u4e0d\u77e5\u9053\uff0c\u6240\u4ee5\u5c31\u9700\u8981\u4f7f\u7528ARP\u534f\u8bae\u3002<\/li>\n\n\n\n
      2. \u83b7\u53d6\u5b66\u6821\u7f51\u5173\u8def\u7531\u5668\u7684MAC\u5730\u5740\u3002horo\u4fbf\u643a\u673a\u751f\u6210\u4e00\u4e2a\u76ee\u7684IP\u5730\u5740\u4e3a68.85.2.1\uff08\u9ed8\u8ba4\u7f51\u5173\uff09\u7684ARP\u67e5\u8be2\u62a5\u6587\uff0c\u5c06\u8be5ARP\u62a5\u6587\u653e\u7f6e\u5728\u4e00\u4e2a\u76ee\u7684MAC\u5730\u5740\u4e3aFF:FF:FF:FF:FF:FF\uff08\u5e7f\u64ad\u5730\u5740\uff09\u7684\u4ee5\u592a\u7f51\u5e27\u4e2d\uff0c\u5e76\u5411\u4ea4\u6362\u673a\u53d1\u9001\u6b64\u4ee5\u592a\u7f51\u5e27\uff0c\u4ea4\u6362\u673a\u4f1a\u5c06\u8be5\u5e27\u53d1\u9001\u7ed9\u6240\u6709\u8fde\u63a5\u8bbe\u5907\uff0c\u5305\u62ec\u9ed8\u8ba4\u8def\u7531\u3002\u7f51\u5173\u8def\u7531\u63a5\u6536\u5230\u8be5\u5e27\u540e\uff0c\u53d1\u73b0ARP\u67e5\u8be2\u62a5\u6587\u4e2d\u7684\u76ee\u7684IP\u5730\u5740\u4e0e\u5176IP\u5730\u5740\u5339\u914d\uff0c\u9042\u751f\u6210\u4e00\u4e2aARP\u54cd\u5e94\u5206\u7ec4\uff0c\u8be5\u5206\u7ec4\u4e2d\u5305\u542b\u7f51\u5173\u8def\u7531IP\u548cMAC\u7684\u5730\u5740\u7684\u6620\u5c04\uff0c\u5e76\u5411\u4ea4\u6362\u673a\u53d1\u9001\u8be5\u5e27\uff0c\u4ea4\u6362\u673a\u4f1a\u5c06\u8be5\u5e27\u8f6c\u53d1\u7ed9horo\u7684\u4fbf\u643a\u673a\u3002<\/li>\n\n\n\n
      3. \u8f6c\u53d1DNS\u67e5\u8be2\u62a5\u6587\u81f3\u7b2c\u4e00\u8df3\u8def\u7531\u3002\u73b0\u5728horo\u7684\u4fbf\u643a\u673a\u5df2\u77e5ISP\u7684DNS\u670d\u52a1IP\u5730\u5740\u548c\u5b66\u6821\u7f51\u5173\u8def\u7531MAC\u5730\u5740\uff0c\u4f1a\u5c06DNS\u67e5\u8be2\u62a5\u6587\u5c01\u88c5\u5728UDP\u62a5\u6587\u6bb5\u4e2d\uff0c\u5e76\u5c06\u8be5\u62a5\u6587\u6bb5\u5c01\u88c5\u5728IP\u6570\u636e\u62a5\u4e2d\uff0c\u76ee\u7684IP\u5730\u5740\u4e3aDNS\u670d\u52a1\u5668\u7684IP\u5730\u5740\uff0c\u6e90IP\u5730\u5740\u4e3a\u4fbf\u643a\u673aIP\u5730\u5740\uff0c\u7136\u540e\u5c06\u8be5IP\u6570\u636e\u62a5\u653e\u5165\u4ee5\u592a\u7f51\u5e27\u4e2d\uff0c\u6e90MAC\u5730\u5740\u4e3a\u4fbf\u643a\u673a\u7f51\u5361MAC\u5730\u5740\uff0c\u76ee\u7684MAC\u5730\u5740\u4e3a\u7f51\u5173\u8def\u7531\u5668\u4e0e\u4ea4\u6362\u673a\u76f8\u8fde\u7684\u7f51\u5361\u7684MAC\u5730\u5740\u3002\u6b64\u65f6DNS\u67e5\u8be2\u62a5\u6587\u5b8c\u6210\u4e86\u6821\u56ed\u5c40\u57df\u7f51\u5185\u7684\u8f6c\u53d1\u5de5\u4f5c\u3002<\/li>\n\n\n\n
      4. \u57df\u5185\u8def\u7531\u9009\u62e9\u5230DNS\u670d\u52a1\u5668\u3002\n
          \n
        1. \u7f51\u5173\u8def\u7531\u5c06DNS\u67e5\u8be2\u62a5\u6587\u8f6c\u53d1\u7ed9ISP\u8fb9\u7f18\u8def\u7531\u5668\u3002\u5f53\u6821\u56ed\u7f51\u5173\u8def\u7531\u5668\u63a5\u6536\u5230\u4ee5\u592a\u7f51\u5e27\u540e\uff0c\u4f1a\u4ece\u4e2d\u62bd\u53d6\u51fa\u76ee\u7684IP\u5730\u5740\uff0868.87.71.226\uff09\uff0c\u5e76\u7531\u8def\u7531\u7684\u8f6c\u53d1\u8868\u786e\u5b9a\u8f6c\u53d1\u8f93\u51fa\u7aef\u53e3\uff08\u786e\u5b9a\u4e3a\u4e0eComcast\u7f51\u7edc\u8fde\u63a5\u7684\u8def\u7531\u5668\uff0c\u5373\u56fe\u4e2d\u7684\u6700\u5de6\u4fa7\u8def\u7531\u5668\uff09\u3002<\/li>\n\n\n\n
        2. \u6839\u636e\u63a7\u5236\u5e73\u9762\u786e\u5b9a\u7684\u8f6c\u53d1\u8868\u8f6c\u53d1DNS\u67e5\u8be2\u62a5\u6587\u3002\u5728\u67e5\u8be2\u62a5\u6587\u5230\u8fbeISP\u7f51\u5185\u65f6\uff0c\u63a7\u5236\u5e73\u9762\u4f1a\u6839\u636e\u76ee\u7684IP\u5730\u5740\u3001\u6e90MAC\u5730\u5740\u7b49\u534f\u8bae\u5c5e\u6027\u786e\u5b9a\u8f6c\u53d1\u8868\uff0c\u5e76\u57fa\u4e8e\u8f6c\u53d1\u8868\u8f6c\u53d1DNS\u67e5\u8be2\u62a5\u6587\u3002<\/li>\n<\/ol>\n<\/li>\n\n\n\n
        3. DNS\u670d\u52a1\u5668\u54cd\u5e94\u67e5\u8be2\u62a5\u6587\u3002\u6700\u7ec8DNS\u670d\u52a1\u5668\u6536\u5230\u5e26\u6709DNS\u67e5\u8be2\u62a5\u6587\u7684\u4ee5\u592a\u7f51\u5e27\uff0c\u5e76\u62bd\u53d6\u51faDNS\u67e5\u8be2\u62a5\u6587\uff0c\u5728\u57df\u540d\u548cIP\u5730\u5740\u7684\u6620\u5c04\u8868\u4e2d\u67e5\u8be2\u76f8\u5e94\u7684\u6620\u5c04\u8bb0\u5f55\uff0c\u5982\u679c\u7f13\u5b58\u4e2d\u5b58\u5728\u5bf9\u5e94\u7684\u8bb0\u5f55\u5219\u76f4\u63a5\u8fd4\u56deDNS\u54cd\u5e94\u62a5\u6587\uff1b\u5982\u679c\u7f13\u5b58\u4e2d\u4e0d\u5b58\u5728\u5bf9\u5e94\u7684\u8bb0\u5f55\uff0c\u5219\u6839\u636e\u94fe\u5f0f\u67e5\u8be2\u6216\u8fed\u4ee3\u67e5\u8be2\u5411\u4e0a\u7ea7DNS\u670d\u52a1\u5668\u83b7\u53d6\u6620\u5c04\u7ed3\u679c\u3002\u5c06DNS\u54cd\u5e94\u62a5\u6587\u9010\u7ea7\u5c01\u88c5\u8fdb\u4ee5\u592a\u7f51\u5e27\u4e2d\uff0c\u5e76\u6839\u636e\u63a7\u5236\u5e73\u9762\u786e\u5b9a\u7684\u8def\u7531\u8f6c\u53d1\u8def\u5f84\u8fdb\u884c\u8f6c\u53d1\uff0c\u6700\u7ec8\u8f6c\u53d1\u5230horo\u7684\u4fbf\u643a\u673a\u3002<\/li>\n\n\n\n
        4. \u63a5\u6536DNS\u54cd\u5e94\u62a5\u6587\u3002horo\u4fbf\u643a\u673a\u63a5\u6536\u5230\u8f6c\u53d1\u62a5\u6587\u540e\uff0c\u6839\u636eDNS\u54cd\u5e94\u62a5\u6587\u83b7\u53d6\u5230www.baidu.com\u5bf9\u5e94\u7684IP\u5730\u5740\u3002<\/li>\n<\/ol>\n<\/li>\n\n\n\n
        5. \u5efa\u7acbTCP\u8fde\u63a5\u3002\u81f3\u6b64\uff0choro\u4fbf\u643a\u673a\u7ec8\u4e8e\u83b7\u5f97\u4e86www.baidu.com\u7684IP\u5730\u5740\uff0choro\u4fbf\u643a\u673a\u5c31\u80fd\u591f\u751f\u6210TCP\u5957\u63a5\u5b57\uff0c\u8be5\u5957\u63a5\u5b57\u5c06\u7528\u4e8e\u9879www.baidu.com\u53d1\u9001HTTP GET\u62a5\u6587\u3002\u5f53horo\u4fbf\u643a\u673a\u751f\u6210\u5957\u63a5\u5b57\u65f6\uff0c\u4fbf\u643a\u673a\u4e2d\u7684TCP\u5fc5\u987b\u548cwww.baidu.com\u7684TCP\u6267\u884c\u4e09\u6b21\u63e1\u624b\uff1a\n
            \n
          1. \u53d1\u9001TCP SYN\u62a5\u6587\u6bb5\u3002horo\u4fbf\u643a\u673a\u9996\u5148\u751f\u6210\u4e00\u4e2a\u5177\u6709\u76ee\u7684\u7aef\u53e380\u7684TCP SYN\u62a5\u6587\u6bb5\uff0c\u5e76\u5c06\u62a5\u6587\u6bb5\u5c01\u88c5\u5728\u76ee\u7684IP\u5730\u5740\u4e3a64.233.169.105\uff08www.baidu.com\uff09\u7684IP\u6570\u636e\u62a5\u4e2d\uff0c\u518d\u5c06\u6570\u636e\u62a5\u5c01\u88c5\u5728\u76ee\u7684MAC\u5730\u5740\u4e3a00:22:6B:45:1F:1B\u7684\u5e27\u4e2d\uff0c\u5e76\u5411\u4ea4\u6362\u673a\u53d1\u9001\u8be5\u5e27\u3002\u62a5\u6587\u7ecf\u7531\u5b66\u6821\u7f51\u7edc\u3001Comcast\u7f51\u7edc\u548c\u767e\u5ea6\u7f51\u7edc\uff0c\u6839\u636eBGP\u534f\u8bae\u786e\u5b9a\u8def\u7531\u5668\u8f6c\u53d1\u8868\u9879\uff0c\u5411\u76ee\u7684\u5730\u5740\u4e00\u8def\u8f6c\u53d1\u8fc7\u53bb\u3002\u6700\u7ec8TCP SYN\u6570\u636e\u62a5\u5230\u8fbewww.baidu.com\u3002<\/li>\n\n\n\n
          2. \u63a5\u6536TCP SYN\u62a5\u6587\u6bb5\uff0c\u5e76\u54cd\u5e94TCP SYNACK\u62a5\u6587\u6bb5\u3002\u76ee\u7684\u4e3b\u673a\u63a5\u6536\u5230\u62a5\u6587\u6bb5\u540e\uff0c\u4ece\u62a5\u6587\u6bb5\u4e2d\u83b7\u53d6\u5230TCP SYN\u62a5\u6587\u5e76\u5206\u89e3\u5230\u4e0e\u7aef\u53e380\u76f8\u8054\u7cfb\u7684\u6b22\u8fce\u5957\u63a5\u5b57\u3002\u5bf9\u4e8e\u767e\u5ea6HTTP\u670d\u52a1\u5668\u548choro\u4fbf\u643a\u673a\u4e4b\u95f4\u7684TCP\u8fde\u63a5\u751f\u6210\u4e00\u4e2a\u8fde\u63a5\u5957\u63a5\u5b57\u3002\u5e76\u751f\u6210\u4e00\u4e2aTCP SYNACK\u62a5\u6587\u6bb5\uff0c\u5c06\u5176\u653e\u5165\u5411horo\u4fbf\u643a\u673a\u5bfb\u5740\u7684\u4e00\u4e2a\u6570\u636e\u62a5\u4e2d\uff0c\u8fd4\u56de\u7ed9horo\u3002<\/li>\n\n\n\n
          3. \u63a5\u6536TCP SYNACK\u62a5\u6587\u6bb5\uff0c\u5e76\u53d1\u9001HTTP GET\u8bf7\u6c42\u3002\u6570\u636e\u62a5\u88ab\u5206\u89e3\u5230horo\u4fbf\u643a\u673a\u7684\u5957\u63a5\u5b57\u4e2d\uff0c\u4ece\u800c\u8fdb\u5165\u8fde\u63a5\u72b6\u6001\uff1bhoro\u4fbf\u643a\u673a\u6d4f\u89c8\u5668\u7f51\u9875\u8bf7\u6c42\u7684GET\u62a5\u6587\uff0c\u5e76\u4f5c\u4e3a\u5728\u548c\u901a\u8fc7\u5957\u63a5\u5b57\u5c01\u88c5\u8fdbTCP\u62a5\u6587\u6bb5\u4e2d\uff0c\u6700\u7ec8\u5c01\u88c5\u5728\u4ee5\u592a\u7f51\u5e27\u4e2d\u53d1\u9001\u7ed9www.baidu.com\u3002<\/li>\n\n\n\n
          4. \u54cd\u5e94HTTP\u8bf7\u6c42\u3002www.baidu.com\u63a5\u6536\u5230HTTP\u8bf7\u6c42\u540e\uff0c\u751f\u6210HTTP\u54cd\u5e94\u62a5\u6587\uff0c\u5c06\u7f51\u9875\u653e\u5165\u54cd\u5e94\u4f53\u4e2d\uff0c\u901a\u8fc7\u5957\u63a5\u5b57\u5c01\u88c5\u5728TCP\u62a5\u6587\u6bb5\u4e2d\uff0c\u53d1\u9001\u7ed9horo\u4fbf\u643a\u673a\u3002<\/li>\n\n\n\n
          5. \u83b7\u53d6HTTP\u54cd\u5e94\u62a5\u6587\uff0c\u5c06\u9875\u9762\u663e\u793a\u5230\u6d4f\u89c8\u5668\u4e0a\u3002horo\u4fbf\u643a\u673a\u6536\u5230\u54cd\u5e94\u62a5\u6587\u540e\uff0c\u901a\u8fc7\u5957\u63a5\u5b57\u5c06HTTP\u7684\u54cd\u5e94\u4f53\u4e2d\u7684\u5185\u5bb9\u53d6\u51fa\uff0c\u5e76\u663e\u793a\u5728Web\u7f51\u9875\u4e0a\u3002<\/li>\n<\/ol>\n<\/li>\n<\/ol>\n\n\n\n

            \u5404\u5c42\u7684\u4f5c\u7528<\/h3>\n\n\n\n
              \n
            1. \u5e94\u7528\u5c42\u3002\u4e3a\u7528\u6237\u63d0\u4f9b\u5404\u79cd\u670d\u52a1\uff0c\u6362\u53e5\u8bdd\u8bf4\u5404\u7c7b\u7f51\u7edc\u534f\u8bae\u53ca\u6846\u67b6\u7684\u5b58\u5728\u610f\u4e49\u4e5f\u4ec5\u662f\u4e3a\u7f51\u7edc\u5e94\u7528\u63d0\u4f9b\u5408\u9002\u7684\u8fd0\u8425\u73af\u5883\u3002<\/li>\n\n\n\n
            2. \u8fd0\u8f93\u5c42\u3002\u63d0\u4f9b\u8fdb\u7a0b\u95f4\u901a\u4fe1\u3002<\/li>\n\n\n\n
            3. \u7f51\u7edc\u5c42\u3002\u63d0\u4f9b\u4e3b\u673a\u95f4\u901a\u4fe1\u3002<\/li>\n\n\n\n
            4. \u94fe\u8def\u5c42\u3002\u63d0\u4f9b\u900f\u660e\u7684\u6570\u636e\u4f20\u8f93\u670d\u52a1\u3002<\/li>\n\n\n\n
            5. \u7269\u7406\u5c42\u3002\u4e3a\u8bbe\u5907\u63d0\u4f9b\u6570\u636e\u4f20\u8f93\u7684\u901a\u8def\u3002<\/li>\n<\/ol>\n\n\n\n

              \u5404\u5c42\u7684\u5206\u7ec4\u540d\u79f0<\/h3>\n\n\n\n
                \n
              1. \u5e94\u7528\u5c42\uff1a\u62a5\u6587<\/li>\n\n\n\n
              2. \u8fd0\u8f93\u5c42\uff1a\u62a5\u6587\u6bb5<\/li>\n\n\n\n
              3. \u7f51\u7edc\u5c42\uff1a\u6570\u636e\u62a5<\/li>\n\n\n\n
              4. \u94fe\u8def\u5c42\uff1a\u5e27<\/li>\n\n\n\n
              5. \u7269\u7406\u5c42\uff1a\u6bd4\u7279\u6d41<\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"

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