\u4e16\u8cbf\u7db2\u5de5\u73ed\u7b2c\u5341\u5929<\/p>\n
<\/p>\n
\u4eca\u5929\u6301\u7e8c\u8b1b\u89e3TCP\u7684\u904b\u4f5c\u539f\u7406\u3002<\/p>\n
TCP\u6a19\u984c\u6709\u4e00\u500bfield\u53ebwindow\uff0c\u4e2d\u6587\u53eb\u8a0a\u6846\u3002\u5b83\u662f\u7528\u4f86\u63d0\u9192\u9023\u7dda\u7684\u5c0d\u65b9\u81ea\u5df1\u9084\u6709\u591a\u5c11\u7de9\u885d\u5340\u53ef\u5b58\u653e\u5c01\u5305\u8cc7\u6599\uff0c\u4ee5\u907f\u514d\u5c0d\u65b9\u50b3\u9001\u904e\u591a\u7684\u5c01\u5305\u800c\u5c0e\u81f4\u907a\u6f0f\u7684\u72c0\u6cc1\u767c\u751f\u3002<\/p>\n
TCP\u7684\u9023\u7dda\u662f\u900f\u904e\u300c\u4e09\u65b9\u4ea4\u63e1(three handshake)\u300d\u7684\u6a5f\u5236\u4f86\u5efa\u7acb\u9023\u7dda\u3002\u5148\u7531\u8981\u6c42\u9023\u7dda\u7684\u4e00\u65b9\u9001\u51fa\u542b\u6709syn\u8a0a\u865f\u7684\u5c01\u5305\uff0c\u800c\u6536\u5230\u5c01\u5305\u7684\u4e00\u65b9\u6703\u56de\u61c9\u542bsyn\u53caack\u8a0a\u865f\u7684\u5c01\u5305\uff0c\u8981\u6c42\u9023\u7dda\u7aef\u5728\u6536\u5230\u56de\u61c9\u5c01\u5305\u5f8c\u6703\u518d\u9001\u4e00\u6b21ack\u8a0a\u865f\uff0c\u4ee5\u78ba\u8a8d\u9023\u7dda\u72c0\u6cc1\u5efa\u7acb\uff0c\u4e4b\u5f8c\u624d\u6703\u958b\u59cb\u9032\u884c\u8cc7\u6599\u7684\u50b3\u905e\u3002<\/p>\n
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