{"id":114688,"date":"2026-10-09T21:57:39","date_gmt":"2026-10-09T13:57:39","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/114688.html"},"modified":"2026-10-09T21:57:39","modified_gmt":"2026-10-09T13:57:39","slug":"linux%e4%b9%8btcp%e7%90%86%e8%ae%ba%ef%bc%9c3%ef%bc%9e","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/114688.html","title":{"rendered":"Linux\u4e4bTCP\u7406\u8bba\uff1c3\uff1e"},"content":{"rendered":"<h4><\/h4>\n<h4>\u786e\u8ba4\u5e94\u7b54\u673a\u5236<\/h4>\n<p>\u786e\u8ba4\u5e94\u7b54&#xff08;ACK&#xff0c;Acknowledge&#xff09;\u662f TCP \u5b9e\u73b0\u53ef\u9760\u4f20\u8f93\u6700\u57fa\u7840\u7684\u673a\u5236\u3002 \u53d1\u9001\u65b9\u53d1\u51fa\u6570\u636e\u540e&#xff0c;\u63a5\u6536\u65b9\u6536\u5230\u6570\u636e&#xff0c;\u8fd4\u56deACK \u786e\u8ba4\u62a5\u6587&#xff0c;\u544a\u8bc9\u53d1\u9001\u65b9&#xff1a;\u54ea\u4e9b\u6570\u636e\u6211\u5df2\u7ecf\u6210\u529f\u6536\u5230\u4e86\u3002<\/p>\n<p>TCP \u662f\u9762\u5411\u5b57\u8282\u6d41\u7684&#xff0c;\u4e0d\u662f\u6309\u62a5\u6587\u786e\u8ba4&#xff0c;\u800c\u662f\u6309\u5b57\u8282\u5e8f\u53f7\u786e\u8ba4\u3002 ACK \u62a5\u6587\u4e2d\u7684\u786e\u8ba4\u5e8f\u53f7\u542b\u4e49&#xff1a;\u786e\u8ba4\u5e8f\u53f7 N&#xff0c;\u8868\u793a\u3010\u5e8f\u53f7 N \u4e4b\u524d\u7684\u6240\u6709\u5b57\u8282&#xff0c;\u63a5\u6536\u65b9\u5168\u90e8\u6536\u5230\u4e86\u3011&#xff0c;\u4e0b\u4e00\u6b21\u6211\u671f\u671b\u6536\u5230\u5e8f\u53f7 N \u5f00\u59cb\u7684\u6570\u636e\u3002<\/p>\n<p>\u786e\u8ba4\u5e94\u7b54\u673a\u5236\u4fdd\u8bc1\u4e86\u5386\u53f2\u62a5\u6587\u7684\u53ef\u9760\u6027<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"831\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/10\/20261009135730-6ac8f2ca5429f.png\" width=\"1161\" \/><\/p>\n<p>\u5f53\u6bd4\u5982\u4e22\u662f3001\u7684ack\u62a5\u6587,\u4f46\u662f\u6536\u52304001\u65f6,\u4e5f\u662f\u786e\u8ba4\u4e4b\u524d\u7684\u62a5\u6587\u5168\u90e8\u90fd\u6536\u5230\u4e86,\u63d0\u9ad8\u4e86\u6548\u7387<\/p>\n<h4>\u8d85\u65f6\u91cd\u4f20\u673a\u5236<\/h4>\n<p>\u57fa\u4e8e\u524d\u9762\u7684\u786e\u8ba4\u5e94\u7b54\u673a\u5236&#xff0c;\u6709\u4e00\u4e2a\u5173\u952e\u95ee\u9898&#xff1a;\u5982\u679c\u53d1\u9001\u51fa\u53bb\u7684\u6570\u636e&#xff0c;\u4e00\u76f4\u6536\u4e0d\u5230\u5bf9\u65b9\u8fd4\u56de\u7684 ACK \u786e\u8ba4\u62a5\u6587&#xff0c;\u8be5\u600e\u4e48\u5904\u7406&#xff1f;<\/p>\n<p>\u6211\u4eec\u4e0d\u80fd\u65e0\u9650\u671f\u539f\u5730\u7b49\u5f85\u3002\u5982\u679c\u4e00\u76f4\u7b49\u4e0d\u5230\u5e94\u7b54&#xff0c;\u4f20\u8f93\u5c31\u5361\u4f4f\u4e86&#xff0c;\u6240\u4ee5 TCP \u8bbe\u8ba1\u4e86\u8d85\u65f6\u91cd\u4f20\u673a\u5236\u6765\u89e3\u51b3\u4e22\u5305\u95ee\u9898\u3002<\/p>\n<p>\u89e6\u53d1\u8d85\u65f6\u91cd\u4f20\u7684\u4e24\u79cd\u573a\u666f<\/p>\n<p>\u6536\u4e0d\u5230 ACK \u6709\u4e24\u79cd\u53ef\u80fd\u6027&#xff0c;\u53d1\u9001\u65b9\u662f\u65e0\u6cd5\u533a\u5206\u5230\u5e95\u662f\u54ea\u4e00\u79cd&#xff1a;<\/p>\n<li>\u5ba2\u6237\u7aef\u53d1\u51fa\u7684\u6570\u636e\u62a5\u6587&#xff0c;\u5728\u7f51\u7edc\u4f20\u8f93\u9014\u4e2d\u4e22\u5931&#xff0c;\u670d\u52a1\u7aef\u6839\u672c\u6ca1\u6709\u6536\u5230\u6570\u636e&#xff0c;\u81ea\u7136\u4e0d\u4f1a\u8fd4\u56de ACK\u3002<\/li>\n<li>\u6570\u636e\u62a5\u6587\u5df2\u7ecf\u6210\u529f\u5230\u8fbe\u670d\u52a1\u7aef&#xff0c;\u4f46\u662f\u670d\u52a1\u7aef\u56de\u590d\u7684 ACK \u786e\u8ba4\u62a5\u6587&#xff0c;\u5728\u534a\u8def\u4e22\u5931\u4e86\u3002<\/li>\n<p>\u4e0d\u7ba1\u662f\u6570\u636e\u4e22\u5305\u8fd8\u662f ACK \u4e22\u5305&#xff0c;\u53d1\u9001\u65b9\u770b\u5230\u7684\u73b0\u8c61\u90fd\u662f&#xff1a;\u8d85\u65f6\u65f6\u95f4\u5185\u6ca1\u6709\u6536\u5230 ACK\u3002 \u4e8e\u662f TCP \u4f1a\u5224\u5b9a\u672c\u6b21\u4f20\u8f93\u5931\u8d25&#xff0c;\u91cd\u65b0\u53d1\u9001\u8fd9\u4efd\u62a5\u6587&#xff0c;\u5e76\u4e14\u91cd\u65b0\u542f\u52a8\u8d85\u65f6\u8ba1\u65f6\u5668&#xff0c;\u518d\u6b21\u7b49\u5f85 ACK\u3002<\/p>\n<p>\u5982\u679c\u53cd\u590d\u591a\u6b21\u91cd\u4f20\u4e4b\u540e&#xff0c;\u4f9d\u65e7\u6536\u4e0d\u5230\u4efb\u4f55\u786e\u8ba4\u5e94\u7b54&#xff0c;TCP \u5c31\u5224\u5b9a\u7f51\u7edc\u5b8c\u5168\u4e0d\u901a&#xff0c;\u4e3b\u52a8\u53d1\u9001 RST \u590d\u4f4d\u62a5\u6587&#xff0c;\u5f3a\u5236\u5173\u95ed\u8fd9\u6761 TCP \u8fde\u63a5\u3002<\/p>\n<p>\u8d85\u65f6\u65f6\u95f4 RTO \u8be5\u5982\u4f55\u8bbe\u5b9a&#xff1f;<\/p>\n<p>\u8d85\u65f6\u65f6\u95f4\u4e0d\u80fd\u968f\u4fbf\u5199\u6b7b&#xff0c;\u8fd9\u91cc\u5b58\u5728\u6743\u8861&#xff1a;<\/p>\n<ul>\n<li>\u5982\u679c\u8d85\u65f6\u65f6\u95f4\u8bbe\u7f6e\u592a\u77ed&#xff1a;\u7f51\u7edc\u53ea\u662f\u8f7b\u5fae\u5ef6\u8fdf&#xff0c;ACK \u8fd8\u5728\u8def\u4e0a\u6ca1\u56de\u6765&#xff0c;\u53d1\u9001\u65b9\u5c31\u63d0\u524d\u91cd\u53d1\u62a5\u6587&#xff0c;\u4ea7\u751f\u5927\u91cf\u591a\u4f59\u91cd\u590d\u6570\u636e\u5305&#xff0c;\u6d6a\u8d39\u7f51\u7edc\u5e26\u5bbd\u3002<\/li>\n<li>\u5982\u679c\u8d85\u65f6\u65f6\u95f4\u8bbe\u7f6e\u592a\u957f&#xff1a;\u62a5\u6587\u771f\u7684\u4e22\u5305\u4e86&#xff0c;\u53d1\u9001\u65b9\u9700\u8981\u7b49\u5f85\u5f88\u4e45\u624d\u4f1a\u91cd\u4f20&#xff0c;\u964d\u4f4e\u4f20\u8f93\u6548\u7387\u3002<\/li>\n<\/ul>\n<p>\u6240\u4ee5 TCP \u4e0d\u4f1a\u4f7f\u7528\u56fa\u5b9a\u7684\u8d85\u65f6\u65f6\u95f4&#xff0c;\u8d85\u65f6\u65f6\u95f4\u662f\u52a8\u6001\u8ba1\u7b97\u51fa\u6765\u7684\u3002 TCP \u4f1a\u6301\u7eed\u91c7\u96c6\u62a5\u6587\u5f80\u8fd4\u8017\u65f6 RTT&#xff08;Round-Trip Time&#xff0c;\u62a5\u6587\u53d1\u51fa\u5230\u6536\u5230 ACK \u7684\u65f6\u95f4&#xff09;&#xff0c;\u6839\u636e\u91c7\u6837\u5230\u7684 RTT \u4e0d\u65ad\u5e73\u6ed1\u66f4\u65b0&#xff0c;\u52a8\u6001\u8c03\u6574\u91cd\u4f20\u8d85\u65f6\u65f6\u95f4 RTO&#xff0c;\u9002\u914d\u5f53\u524d\u7f51\u7edc\u72b6\u6001\u3002\u7f51\u7edc\u6ce2\u52a8\u5927\u7684\u65f6\u5019 RTO \u81ea\u52a8\u53d8\u5927&#xff0c;\u7f51\u7edc\u7a33\u5b9a\u65f6 RTO \u9002\u5f53\u7f29\u5c0f\u3002<\/p>\n<\/p>\n<h4>\u8fde\u63a5\u7ba1\u7406\u673a\u5236<\/h4>\n<p>\u5728\u6b63\u5e38\u60c5\u51b5\u4e0b, TCP\u8981\u7ecf\u8fc7\u4e09\u6b21\u63e1\u624b\u5efa\u7acb\u8fde\u63a5, \u56db\u6b21\u6325\u624b\u65ad\u5f00\u8fde\u63a5<\/p>\n<h5>\u4e09\u6b21\u63e1\u624b<img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"1017\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/10\/20261009135730-6ac8f2cae2344.png\" width=\"1521\" \/><\/h5>\n<\/p>\n<p>TCP \u662f\u5168\u53cc\u5de5\u901a\u4fe1&#xff0c;\u5ba2\u6237\u7aef\u548c\u670d\u52a1\u5668\u53cc\u65b9\u90fd\u53ef\u4ee5\u540c\u65f6\u6536\u53d1\u6570\u636e\u3002 \u60f3\u8981\u5efa\u7acb\u8fde\u63a5&#xff0c;\u672c\u8d28\u4e0a\u9700\u8981\u786e\u8ba4\u4e24\u4ef6\u6838\u5fc3\u4e8b\u60c5&#xff1a;<\/p>\n<li>\u53cc\u65b9\u6709\u901a\u4fe1\u610f\u613f&#xff0c;\u613f\u610f\u5efa\u7acb TCP \u8fde\u63a5&#xff1b;<\/li>\n<li>\u53cc\u65b9\u6536\u53d1\u901a\u9053\u6b63\u5e38&#xff1a;\u5ba2\u6237\u7aef\u80fd\u53d1\u80fd\u6536\u3001\u670d\u52a1\u7aef\u4e5f\u80fd\u53d1\u80fd\u6536\u3002<\/li>\n<p>\u7406\u8bba\u4e0a\u5b8c\u6210\u8fd9\u4e24\u6b21\u786e\u8ba4\u9700\u8981\u56db\u6b21\u62a5\u6587\u4ea4\u4e92&#xff0c;\u4f46\u662f\u670d\u52a1\u7aef\u6536\u5230\u8fde\u63a5\u8bf7\u6c42\u540e&#xff0c;\u53ef\u4ee5\u628a\u300cSYn \u540c\u6b65\u8bf7\u6c42\u300d\u548c\u300cACK \u786e\u8ba4\u5e94\u7b54\u5408\u5e76\u5230\u540c\u4e00\u4e2a\u62a5\u6587&#xff0c;\u6240\u4ee5\u6700\u7ec8\u53ea\u9700\u8981\u4e09\u6b21\u62a5\u6587\u4ea4\u4e92&#xff0c;\u4e5f\u5c31\u662f\u4e09\u6b21\u63e1\u624b\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"1029\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/10\/20261009135731-6ac8f2cb5d6e2.png\" width=\"1887\" \/><\/p>\n<p>\u4e09\u6b21\u63e1\u624b\u786e\u8ba4\u53cc\u65b9\u6536\u53d1\u80fd\u529b\u4e0e\u901a\u4fe1\u610f\u613f&#xff1b;\u670d\u52a1\u7aef\u628a SYN \u548c ACK \u5408\u5e76\u53d1\u9001&#xff0c;\u7531\u56db\u6b21\u7b80\u5316\u4e3a\u4e09\u6b21&#xff1b;\u4e24\u6b21\u63e1\u624b\u65e0\u6cd5\u9a8c\u8bc1\u670d\u52a1\u7aef\u53d1\u9001\u80fd\u529b&#xff0c;\u8fd8\u4f1a\u4ea7\u751f\u65e0\u6548\u8fde\u63a5\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"948\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/10\/20261009135732-6ac8f2cc1acec.png\" width=\"1419\" \/><\/p>\n<p>TCP \u5efa\u7acb\u8fde\u63a5\u65f6&#xff0c;\u5ba2\u6237\u7aef\u4e0e\u670d\u52a1\u7aef\u7684 TCP \u5185\u6838\u72b6\u6001\u4f1a\u968f\u62a5\u6587\u4ea4\u4e92\u4e0d\u65ad\u5207\u6362\u3002\u5f53\u4e24\u7aef\u72b6\u6001\u90fd\u53d8\u6210ESTABLISHED&#xff0c;\u4ee3\u8868 TCP \u8fde\u63a5\u5df2\u7ecf\u5728\u5185\u6838\u4e2d\u5efa\u7acb\u5b8c\u6210\u3002 \u6ce8\u610f&#xff1a;\u4e09\u6b21\u63e1\u624b\u7531\u64cd\u4f5c\u7cfb\u7edf\u5185\u6838\u5b8c\u6210&#xff0c;accept \u53ea\u662f\u5e94\u7528\u5c42\u63a5\u53e3&#xff0c;\u4f5c\u7528\u662f\u4ece\u5185\u6838\u7684\u5168\u8fde\u63a5\u961f\u5217\u53d6\u51fa\u5df2\u5efa\u7acb\u597d\u7684\u8fde\u63a5\u3002\u5c31\u7b97\u4e0d\u8c03\u7528 accept&#xff0c;\u5185\u6838\u4f9d\u7136\u53ef\u4ee5\u5b8c\u6210\u4e09\u6b21\u63e1\u624b\u3002 listen \u51fd\u6570\u7684\u7b2c\u4e8c\u4e2a\u53c2\u6570 backlog \u4ee3\u8868\u5168\u8fde\u63a5\u961f\u5217\u7684\u957f\u5ea6&#xff0c;\u7528\u6765\u5b58\u653e\u5df2\u7ecf\u5b8c\u6210\u4e09\u6b21\u63e1\u624b\u7684\u8fde\u63a5\u3002\u5728\u64cd\u4f5c\u7cfb\u7edf\u5b9e\u9645\u5b9e\u73b0\u4e2d&#xff0c;\u5141\u8bb8\u6392\u961f\u7684\u8fde\u63a5\u6570\u91cf\u4f1a\u7565\u5927\u4e8e backlog\u3002<\/p>\n<\/p>\n<p>\u6ca1\u6709accept\u4e5f\u53ef\u4ee5\u5efa\u7acb\u8fde\u63a5<\/p>\n<p>\u63a5\u6536\u7aef\u7ef4\u6301\u7684\u6ca1\u6709\u88abaccept\u63a5\u6536\u7684\u8fde\u63a5(\u5168\u8fde\u63a5\u961f\u5217)\u4e2a\u6570\u662f\u6709\u4e0a\u9650\u7684,\u4e00\u822c\u662flisten\u7684\u7b2c\u4e8c\u4e2a\u53c2\u6570&#043;1,&#8212;-&gt;\u4fdd\u8bc1\u4e86\u670d\u52a1\u5668\u7684\u6ee1\u8f7d\u7387<\/p>\n<hr \/>\n<h5>\u56db\u6b21\u6325\u624b<\/h5>\n<p>\u56db\u6b21\u6325\u624b\u662f\u53ef\u4ee5\u7531\u4efb\u610f\u4e00\u65b9\u65ad\u5f00\u8fde\u63a5,\u4f46\u901a\u5e38\u662fclient\u5148\u5173\u95ed\u8fde\u63a5<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"899\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/10\/20261009135732-6ac8f2cc8e2c8.png\" width=\"1380\" \/><\/p>\n<p>TCP \u662f\u5168\u53cc\u5de5\u901a\u4fe1&#xff0c;\u8fde\u63a5\u53ef\u4ee5\u770b\u4f5c\u4e24\u6761\u72ec\u7acb\u7684\u5355\u5411\u901a\u9053&#xff08;\u4e00\u6761\u5ba2\u6237\u7aef\u2192\u670d\u52a1\u7aef&#xff0c;\u4e00\u6761\u670d\u52a1\u7aef\u2192\u5ba2\u6237\u7aef&#xff09;&#xff0c;\u8bfb\u5199\u662f\u5206\u5f00\u7684\u3002 FIN\u62a5\u6587\u7684\u542b\u4e49&#xff1a;\u6211\u8fd9\u8fb9\u4e0d\u518d\u53d1\u9001\u65b0\u6570\u636e&#xff0c;\u5173\u95ed\u6211\u65b9\u7684\u5199\u901a\u9053&#xff1b;\u4f46\u8bfb\u901a\u9053\u4f9d\u7136\u4fdd\u6301\u6253\u5f00&#xff0c;\u8fd8\u80fd\u7ee7\u7eed\u63a5\u6536\u5bf9\u65b9\u53d1\u6765\u7684\u6570\u636e\u3002<\/p>\n<p>\u8fd9\u5c31\u662f\u56db\u6b21\u6325\u624b\u4e0d\u80fd\u5408\u5e76\u6210\u4e09\u6b21\u7684\u6839\u672c\u539f\u56e0&#xff1a;\u53cc\u65b9\u53ef\u4ee5\u72ec\u7acb\u5173\u95ed\u81ea\u5df1\u7684\u5199\u65b9\u5411\u3002<\/p>\n<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"348\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/10\/20261009135732-6ac8f2ccecf57.png\" width=\"1065\" \/><\/p>\n<p>\u8c03\u7528close\u5c31\u4f1a\u5c06\u8fde\u63a5\u5173\u95ed<\/p>\n<p>\u4f46\u662f\u6211\u4eec\u4e5f\u6709\u5176\u4ed6\u7684\u7cfb\u7edf\u8c03\u7528shotdown<\/p>\n<p>shutdown&#xff1a;\u4e13\u95e8\u7528\u6765\u5173\u95ed\u5355\u5411\u901a\u9053&#xff0c;\u53ef\u4ee5\u9009\u62e9\u53ea\u5173\u95ed\u5199\u7aef&#xff0c;\u4fdd\u7559\u8bfb\u7aef&#xff0c;\u5b8c\u7f8e\u5b9e\u73b0 TCP \u534a\u5173\u95ed\u3002\u4e0d\u53d7\u6587\u4ef6\u63cf\u8ff0\u7b26\u5f15\u7528\u8ba1\u6570\u5f71\u54cd&#xff0c;\u76f4\u63a5\u64cd\u4f5c\u5185\u6838 TCP \u8fde\u63a5\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"692\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/10\/20261009135733-6ac8f2cd27b45.png\" width=\"1482\" \/><\/p>\n<p>\u4e3a\u4ec0\u4e48\u4f1a\u6ca1\u6709\u7acb\u5373\u5173\u95ed???<\/p>\n<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"630\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/10\/20261009135733-6ac8f2cd72ad5.png\" width=\"1713\" \/><\/p>\n<p>\u539f\u56e0 1<\/p>\n<p>\u7b2c\u56db\u6b21\u6325\u624b\u7684 ACK \u62a5\u6587\u5728\u7f51\u7edc\u4f20\u8f93\u65f6\u6709\u53ef\u80fd\u4e22\u5931\u3002 \u5982\u679c\u5ba2\u6237\u7aef\u6536\u5230 FIN \u4e4b\u540e\u76f4\u63a5\u5173\u95ed\u8fde\u63a5&#xff1a;<\/p>\n<ul>\n<li>\u670d\u52a1\u7aef\u6536\u4e0d\u5230 ACK&#xff0c;\u4f1a\u4e00\u76f4\u91cd\u53d1 FIN \u62a5\u6587&#xff0c;\u6301\u7eed\u5360\u7528\u7cfb\u7edf\u8d44\u6e90&#xff1b;<\/li>\n<li>\u6b64\u65f6\u5ba2\u6237\u7aef\u8fde\u63a5\u5df2\u7ecf\u9500\u6bc1&#xff0c;\u6536\u5230\u91cd\u4f20 FIN \u53ea\u80fd\u56de\u590d RST&#xff0c;\u5bfc\u81f4\u670d\u52a1\u7aef\u65e0\u6cd5\u6b63\u5e38\u5173\u95ed\u3002<\/li>\n<\/ul>\n<p>\u5ba2\u6237\u7aef\u4fdd\u6301TIME_WAIT\u72b6\u6001\u7b49\u5f85 2MSL&#xff1a; \u53ea\u8981\u670d\u52a1\u7aef\u91cd\u53d1 FIN&#xff0c;\u5ba2\u6237\u7aef\u5185\u6838\u5c31\u53ef\u4ee5\u91cd\u65b0\u56de\u590d ACK&#xff0c;\u4fdd\u8bc1\u670d\u52a1\u7aef\u6b63\u5e38\u5b8c\u6210\u5173\u95ed\u6d41\u7a0b\u3002<\/p>\n<p>\u539f\u56e0 2<\/p>\n<p>\u7f51\u7edc\u4f20\u8f93\u5b58\u5728\u5ef6\u8fdf&#xff0c;\u53ef\u80fd\u5b58\u5728\u8fdf\u5230\u7684\u65e7\u6570\u636e\u5305&#xff08;\u9648\u5e74\u62a5\u6587&#xff09;\u5728\u7f51\u7edc\u91cc\u6e38\u8361\u3002 \u5982\u679c\u5ba2\u6237\u7aef\u7acb\u523b\u91ca\u653e\u7aef\u53e3&#xff0c;\u9a6c\u4e0a\u7528\u76f8\u540c IP &#043; \u7aef\u53e3\u65b0\u5efa TCP \u8fde\u63a5&#xff1a; \u65e7\u7684\u6ede\u7559\u62a5\u6587\u5230\u8fbe\u540e&#xff0c;\u5305\u5934\u7684\u5e8f\u5217\u53f7\u3001\u7aef\u53e3\u521a\u597d\u5339\u914d&#xff0c;\u65b0\u8fde\u63a5\u4f1a\u9519\u8bef\u63a5\u6536\u8fd9\u4efd\u4e0d\u5c5e\u4e8e\u81ea\u5df1\u7684\u65e7\u6570\u636e&#xff0c;\u9020\u6210\u6570\u636e\u9519\u4e71\u3002<\/p>\n<p>2MSL \u662f\u62a5\u6587\u5728\u7f51\u7edc\u4e2d\u6700\u5927\u5b58\u6d3b\u65f6\u95f4\u3002\u7b49\u5f85\u6ee1 2MSL&#xff0c;\u53ef\u4ee5\u786e\u4fdd&#xff1a;\u4e0a\u4e00\u8f6e\u8fde\u63a5\u6240\u6709\u6b8b\u7559\u62a5\u6587&#xff0c;\u5168\u90e8\u5728\u7f51\u7edc\u4e2d\u5931\u6548\u6d88\u5931&#xff0c;\u4e0d\u4f1a\u5e72\u6270\u540e\u7eed\u65b0\u8fde\u63a5\u3002<\/p>\n<p>\u00a0TCP \u5728\u65b0\u5efa\u8fde\u63a5\u65f6&#xff0c;\u521d\u59cb\u5e8f\u5217\u53f7 ISN \u4f1a\u4f7f\u7528\u968f\u673a\u503c\u3002\u5c31\u7b97\u6709\u6b8b\u7559\u62a5\u6587&#xff0c;\u5e8f\u5217\u53f7\u5927\u6982\u7387\u5bf9\u4e0d\u4e0a&#xff0c;\u8fdb\u4e00\u6b65\u964d\u4f4e\u65e7\u62a5\u6587\u88ab\u8bef\u63a5\u6536\u7684\u6982\u7387&#xff0c;\u4f5c\u4e3a\u8f85\u52a9\u9632\u62a4\u624b\u6bb5\u3002<\/p>\n<\/p>\n<p>\u5e94\u7528\u5c42\u7684 fd \u5df2\u7ecf\u5173\u6389\u4e86&#xff0c;\u4f46\u662f\u5185\u6838\u8fd8\u8981 \u201c\u7ad9\u5c97\u7b49 2MSL\u201d&#xff0c;\u9632\u6b62\u62a5\u6587\u6ede\u7559&#xff0c;\u6240\u4ee5\u7aef\u53e3\u8fd8\u88ab\u5185\u6838\u5360\u7740&#xff0c;2MSL \u8d85\u65f6\u540e\u5185\u6838\u624d\u5f7b\u5e95\u91ca\u653e\u7aef\u53e3\u4e0e TCP \u8d44\u6e90\u3002<\/p>\n<\/p>\n<h4>\u6d41\u91cf\u63a7\u5236<\/h4>\n<p><img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"546\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/10\/20261009135733-6ac8f2cddee42.png\" width=\"1386\" \/><\/p>\n<p>Client \u4e0d\u505c\u53d1\u6d88\u606f&#xff0c;Server \u5e94\u7528\u5c42\u5904\u7406\u901f\u5ea6\u8ddf\u4e0d\u4e0a&#xff0c;Server \u5185\u6838\u7684 TCP \u63a5\u6536\u7f13\u51b2\u533a\u88ab\u586b\u6ee1\u3002 \u5f53\u63a5\u6536\u7f13\u51b2\u533a\u6ee1\u4e4b\u540e&#xff0c;\u65b0\u5230\u8fbe\u7684 TCP \u62a5\u6587\u6bb5\u5c31\u4f1a\u88ab\u4e22\u5f03&#xff0c;\u9020\u6210\u7f51\u7edc\u8d44\u6e90\u6d6a\u8d39\u3002 &#x1f449; \u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\u7684\u673a\u5236\u5c31\u662f TCP \u6d41\u91cf\u63a7\u5236<\/p>\n<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"1011\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/10\/20261009135734-6ac8f2ce27f53.png\" width=\"1818\" \/><\/p>\n<h3><\/h3>\n<p>TCP \u63d0\u4f9b\u6d41\u91cf\u63a7\u5236\u673a\u5236&#xff1a;\u6839\u636e\u63a5\u6536\u7aef\u5b9e\u9645\u7684\u6570\u636e\u5904\u7406\u80fd\u529b&#xff0c;\u52a8\u6001\u9650\u5236\u53d1\u9001\u7aef\u7684\u6570\u636e\u53d1\u9001\u901f\u7387&#xff0c;\u907f\u514d\u53d1\u9001\u65b9\u53d1\u9001\u901f\u5ea6\u8fc7\u5feb&#xff0c;\u63a5\u6536\u65b9\u6765\u4e0d\u53ca\u8bfb\u53d6&#xff0c;\u6700\u7ec8\u5bfc\u81f4\u5185\u6838\u63a5\u6536\u7f13\u51b2\u533a\u6ea2\u51fa\u3001\u62a5\u6587\u4e22\u5931&#xff0c;\u6d6a\u8d39\u7f51\u7edc\u8d44\u6e90\u3002<\/p>\n<p>TCP \u62a5\u5934\u4e2d\u5b58\u572816 \u4f4d\u7a97\u53e3\u5927\u5c0f\u5b57\u6bb5&#xff0c;\u8be5\u5b57\u6bb5\u627f\u8f7d\u7684\u503c\u5c31\u662f\u63a5\u6536\u7a97\u53e3 rwnd&#xff08;Receive Window&#xff09;\u3002 \u63a5\u6536\u65b9\u5728\u56de\u590d\u7684 ACK \u62a5\u6587\u4e2d&#xff0c;\u5c06\u5f53\u524d\u5185\u6838\u63a5\u6536\u7f13\u51b2\u533a\u5269\u4f59\u53ef\u7528\u5b57\u8282\u6570\u586b\u5165\u8be5\u5b57\u6bb5&#xff0c;\u544a\u77e5\u53d1\u9001\u65b9&#xff1a;\u6211\u5f53\u524d\u6700\u591a\u8fd8\u80fd\u63a5\u6536\u591a\u5c11\u5b57\u8282\u7684\u6570\u636e\u3002<\/p>\n<p>\u6838\u5fc3\u89c4\u5219<\/p>\n<li>\u7a97\u53e3\u5927\u5c0f\u6570\u503c\u8d8a\u5927&#xff0c;\u4ee3\u8868\u63a5\u6536\u7aef\u7a7a\u95f2\u7f13\u51b2\u533a\u7a7a\u95f4\u8d8a\u591a&#xff0c;\u901a\u4fe1\u7684\u541e\u5410\u91cf\u8d8a\u9ad8\u3002<\/li>\n<li>\u5f53\u63a5\u6536\u7aef\u76d1\u6d4b\u5230\u81ea\u8eab\u63a5\u6536\u7f13\u51b2\u533a\u5feb\u8981\u88ab\u586b\u6ee1\u65f6&#xff0c;\u4f1a\u5728 ACK \u62a5\u6587\u4e2d\u586b\u5165\u66f4\u5c0f\u7684\u7a97\u53e3\u503c&#xff0c;\u901a\u77e5\u53d1\u9001\u65b9\u964d\u4f4e\u53d1\u9001\u901f\u7387\u3002<\/li>\n<li>\u53d1\u9001\u65b9\u6536\u5230\u66f4\u65b0\u540e\u7684\u7a97\u53e3\u503c&#xff0c;\u4e3b\u52a8\u51cf\u6162\u6570\u636e\u53d1\u9001\u901f\u5ea6&#xff0c;\u9632\u6b62\u63a5\u6536\u7f13\u51b2\u533a\u6ea2\u51fa\u4e22\u5305\u3002<\/li>\n<li>\u82e5\u63a5\u6536\u7aef\u7f13\u51b2\u533a\u5b8c\u5168\u5360\u6ee1&#xff0c;\u5219\u5c06\u7a97\u53e3\u5927\u5c0f\u7f6e\u4e3a0&#xff1a;\n<ul>\n<li>\u53d1\u9001\u65b9\u6536\u5230rwnd&#061;0\u540e&#xff0c;\u505c\u6b62\u53d1\u9001\u65b0\u7684\u6570\u636e\u62a5\u6587&#xff1b;<\/li>\n<li>\u4f46\u53d1\u9001\u65b9\u9700\u8981\u5b9a\u671f\u53d1\u9001\u7a97\u53e3\u63a2\u6d4b\u62a5\u6587\u6bb5&#xff0c;\u6301\u7eed\u8be2\u95ee\u63a5\u6536\u7aef\u6700\u65b0\u7a97\u53e3\u5927\u5c0f\u3002<\/li>\n<\/ul>\n<p>\u63a2\u6d4b\u62a5\u6587\u7684\u610f\u4e49&#xff1a;\u5982\u679c\u63a5\u6536\u7aef\u540e\u7eed\u7a97\u53e3\u6062\u590d\u7684 ACK \u62a5\u6587\u5728\u7f51\u7edc\u4e2d\u4e22\u5931&#xff0c;\u53d1\u9001\u65b9\u4f1a\u6c38\u4e45\u963b\u585e\u7b49\u5f85\u3002\u7a97\u53e3\u63a2\u6d4b\u7528\u6765\u907f\u514d\u8fd9\u79cd\u901a\u4fe1\u6b7b\u9501\u3002<\/p>\n<\/li>\n<h4>\u6ed1\u52a8\u7a97\u53e3<\/h4>\n<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"954\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/10\/20261009135734-6ac8f2ceccbaf.png\" width=\"948\" \/><\/p>\n<\/p>\n<p>\u6ed1\u52a8\u7a97\u53e3\u672c\u8d28\u662f\u53d1\u9001\u7f13\u51b2\u533a\u91cc\u7684\u4e00\u6bb5\u533a\u95f4&#xff0c;\u5b83\u4ee3\u8868\u5f53\u524d\u53ef\u4ee5\u76f4\u63a5\u53d1\u9001\u3001\u4e0d\u9700\u8981\u7b49\u5f85\u524d\u9762\u6bcf\u4e00\u6bb5\u786e\u8ba4\u5e94\u7b54\u7684\u6570\u636e\u8303\u56f4\u3002<\/p>\n<li>\u7eff\u8272&#xff1a;\u5df2\u786e\u8ba4\u6570\u636e \u6570\u636e\u5df2\u7ecf\u53d1\u9001\u51fa\u53bb&#xff0c;\u5e76\u4e14\u6536\u5230\u4e86\u5bf9\u65b9\u7684 ACK \u786e\u8ba4\u3002\u8fd9\u90e8\u5206\u6570\u636e\u4f7f\u547d\u5b8c\u6210&#xff0c;\u53ef\u4ee5\u76f4\u63a5\u4ece\u7f13\u51b2\u533a\u6e05\u9664&#xff0c;\u91ca\u653e\u7a7a\u95f4\u3002<\/li>\n<li>\u7ea2\u8272&#xff1a;\u6ed1\u52a8\u7a97\u53e3&#xff08;\u7a97\u53e3\u5185\u5f85\u53d1\u9001 \/ \u5df2\u53d1\u9001\u672a\u786e\u8ba4&#xff09; \u8fd9\u5c31\u662f\u6ed1\u52a8\u7a97\u53e3\u8986\u76d6\u7684\u533a\u57df\u3002\u7a97\u53e3\u5185\u7684\u6570\u636e\u53ef\u4ee5\u76f4\u63a5\u53d1\u9001\u51fa\u53bb&#xff0c;\u4e0d\u9700\u8981\u7b49\u524d\u9762\u6bcf\u4e00\u6761\u62a5\u6587\u7684 ACK\u3002\n<ul>\n<li>\u4e00\u90e8\u5206\u53ef\u80fd\u5df2\u7ecf\u53d1\u51fa\u53bb&#xff0c;\u6b63\u5728\u7b49\u5f85 ACK&#xff1b;<\/li>\n<li>\u4e00\u90e8\u5206\u8fd8\u5728\u7f13\u51b2\u533a&#xff0c;\u968f\u65f6\u53ef\u4ee5\u53d1\u9001\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\u84dd\u8272&#xff1a;\u5f85\u53d1\u9001\u6570\u636e&#xff08;\u7a97\u53e3\u5916&#xff09; \u5728\u6ed1\u52a8\u7a97\u53e3\u5916\u9762&#xff0c;\u6682\u65f6\u4e0d\u80fd\u53d1\u9001\u3002\u53ea\u6709\u5f53\u6536\u5230 ACK&#xff0c;\u7a97\u53e3\u5411\u53f3\u6ed1\u52a8\u3001\u5305\u542b\u8fd9\u90e8\u5206\u6570\u636e\u4e4b\u540e&#xff0c;\u624d\u5141\u8bb8\u53d1\u9001\u3002<\/li>\n<p><img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"747\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/10\/20261009135735-6ac8f2cf158fa.png\" width=\"957\" \/><\/p>\n<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"936\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/10\/20261009135735-6ac8f2cf4881e.png\" width=\"2325\" \/><\/p>\n<p>start_win &#061; 1001&#xff0c;end_win &#061; 5001 \u7a97\u53e3\u5927\u5c0f&#xff1a;end_win &#8211; start_win &#061; 4000\u5b57\u8282\u3002 \u7a97\u53e3\u5185\u5e8f\u53f7\u8303\u56f4&#xff1a;[1001, 5000]&#xff0c;\u8fd9\u4e00\u6bb5\u6570\u636e\u53ef\u4ee5\u4e00\u6b21\u6027\u8fde\u7eed\u53d1\u9001&#xff0c;\u4e0d\u7528\u7b49\u6bcf\u4e00\u6bb5 ACK\u3002 \u4e3b\u673a A \u628a\u7a97\u53e3\u5185\u7684\u6570\u636e\u5206\u6210 4 \u6bb5&#xff0c;\u4f9d\u6b21\u53d1\u9001\u7ed9\u4e3b\u673a B\u3002<\/p>\n<p>\u6536\u5230 ACK \u62a5\u6587<\/p>\n<p>\u4e3b\u673a B \u6536\u52301001~2000\u7684\u6570\u636e\u4e4b\u540e&#xff0c;\u56de\u590d ACK \u62a5\u6587&#xff1a;<\/p>\n<ul>\n<li>\u786e\u8ba4\u5e8f\u53f7&#xff1a;2001&#xff0c;\u542b\u4e49&#xff1a;\u5e8f\u53f7 2001 \u4e4b\u524d\u7684\u6570\u636e\u5168\u90e8\u6536\u5230&#xff0c;\u671f\u671b\u4e0b\u4e00\u6b21\u6536\u5230\u5e8f\u53f7 2001 \u5f00\u59cb\u7684\u6570\u636e<\/li>\n<li>ACK-win&#xff08;rwnd \u63a5\u6536\u7a97\u53e3&#xff09;&#061;4000&#xff0c;\u4ee3\u8868\u4e3b\u673a B \u8fd8\u80fd\u63a5\u6536 4000 \u5b57\u8282<\/li>\n<\/ul>\n<h4>\u66f4\u65b0\u7a97\u53e3\u8fb9\u754c\u516c\u5f0f<\/h4>\n<li>\u65b0\u7684start_win &#061; ACK\u786e\u8ba4\u5e8f\u53f7<\/li>\n<li>\u65b0\u7684end_win &#061; \u65b0start_win &#043; ACK-win<\/li>\n<p>\u6ed1\u52a8\u7a97\u53e3\u7684\u5927\u5c0f\u662f\u4f1a\u53d1\u751f\u53d8\u5316\u7684<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"891\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/10\/20261009135736-6ac8f2d044109.png\" width=\"546\" \/><\/p>\n<p>\u6ed1\u52a8\u7a97\u53e3\u4f1a\u5411\u5de6\u6ed1\u52a8\u5417????<\/p>\n<p>\u4e0d\u53ef\u80fd!!!<\/p>\n<p>\u786e\u8ba4\u5e8f\u53f7\u53ea\u4f1a\u8d8a\u6765\u8d8a\u5927&#xff0c;\u6240\u4ee5start_win\u53ea\u80fd\u4e0d\u65ad\u5411\u53f3&#xff08;\u5e8f\u53f7\u589e\u5927\u65b9\u5411&#xff09;\u79fb\u52a8&#xff0c;\u4e0d\u53ef\u80fd\u56de\u9000\u3001\u5411\u5de6\u79fb\u52a8\u3002<\/p>\n<\/p>\n<hr \/>\n<p><img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"633\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/10\/20261009135736-6ac8f2d05a176.png\" width=\"1074\" \/><\/p>\n<\/p>\n<\/p>\n<h5>\u5feb\u91cd\u4f20\u673a\u5236<\/h5>\n<p>TCP \u8d85\u65f6\u91cd\u4f20\u6709\u4e00\u4e2a\u7f3a\u70b9&#xff1a;\u9700\u8981\u7b49\u5f85\u8d85\u65f6\u8ba1\u65f6\u5668\u5230\u671f\u4e4b\u540e&#xff0c;\u624d\u4f1a\u91cd\u4f20\u4e22\u5931\u62a5\u6587\u3002\u4e00\u65e6\u8d85\u65f6\u65f6\u95f4\u6bd4\u8f83\u957f&#xff0c;\u4f20\u8f93\u5c31\u4f1a\u5361\u987f&#xff0c;\u964d\u4f4e\u541e\u5410\u91cf\u3002\u5feb\u91cd\u4f20&#xff08;\u5feb\u901f\u91cd\u4f20&#xff09;\u5c31\u662f\u7528\u6765\u4f18\u5316\u8fd9\u4e2a\u573a\u666f&#xff0c;\u4e0d\u7528\u7b49\u5f85\u8d85\u65f6&#xff0c;\u63d0\u524d\u89e6\u53d1\u91cd\u4f20\u3002<\/p>\n<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"1053\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/10\/20261009135736-6ac8f2d09f4da.png\" width=\"1392\" \/><\/p>\n<p>\u6211\u4eec\u53ef\u4ee5\u601d\u8003\u4e00\u4e0b\u8fd9\u4e2a\u8fc7\u7a0b\u4e2d\u5bf9\u65b9\u7684\u786e\u8ba4\u5e8f\u53f7\u662f\u4ec0\u4e48????<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"1023\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/10\/20261009135737-6ac8f2d115942.png\" width=\"1482\" \/><\/p>\n<p>\u5982\u679c\u53d1\u9001\u7aef\u4e3b\u673a\u8fde\u7eed\u4e09\u6b21\u6536\u5230\u4e86\u540c\u6837\u4e00\u4e2a &#034;4001&#034; \u8fd9\u6837\u7684\u5e94\u7b54, \u5c31\u4f1a\u5c06\u5bf9\u5e94\u7684\u6570\u636e 4001-5000 \u91cd \u65b0\u53d1\u9001; \u2022 \u8fd9\u4e2a\u65f6\u5019\u63a5\u6536\u7aef\u6536\u5230\u4e86 4001 \u4e4b\u540e, \u518d\u6b21\u8fd4\u56de\u7684ACK\u5c31\u662f7001\u4e86(\u56e0\u4e3a2001 &#8211; 7000)\u63a5\u6536\u7aef\u5176\u5b9e\u4e4b\u524d \u5c31\u5df2\u7ecf\u6536\u5230\u4e86, \u88ab\u653e\u5230\u4e86\u63a5\u6536\u7aef\u64cd\u4f5c\u7cfb\u7edf\u5185\u6838\u7684\u63a5\u6536\u7f13\u51b2\u533a\u4e2d;<\/p>\n<p>\u5feb\u91cd\u4f20\u6838\u5fc3\u89c4\u5219<\/p>\n<li>\u89e6\u53d1\u6761\u4ef6&#xff1a;\u53d1\u9001\u65b9\u6536\u52303 \u4e2a\u91cd\u590d ACK&#xff08;\u5197\u4f59 ACK&#xff09;&#xff0c;\u76f4\u63a5\u5224\u5b9a\u62a5\u6587\u4e22\u5931&#xff0c;\u7acb\u5373\u91cd\u4f20\u4e22\u5931\u62a5\u6587&#xff0c;\u4e0d\u7b49\u5f85\u8d85\u65f6\u91cd\u4f20\u5b9a\u65f6\u5668\u3002<\/li>\n<li>\u539f\u7406&#xff1a;\u63a5\u6536\u65b9\u6536\u5230\u4e71\u5e8f\u62a5\u6587\u65f6&#xff0c;\u4f1a\u6301\u7eed\u53d1\u9001\u91cd\u590d ACK&#xff0c;\u544a\u8bc9\u53d1\u9001\u65b9\u7f3a\u5c11\u54ea\u4e00\u6bb5\u6570\u636e\u3002\u591a\u4e2a\u91cd\u590d ACK \u4ee3\u8868\u8fd9\u4e2a\u4e22\u5305\u6982\u7387\u5f88\u9ad8\u3002<\/li>\n<li>\u53ea\u91cd\u4f20\u4e22\u5931\u7684\u90a3\u4e00\u6bb5\u62a5\u6587&#xff0c;\u4e0d\u9700\u8981\u91cd\u4f20\u6ed1\u52a8\u7a97\u53e3\u5185\u6240\u6709\u6570\u636e\u3002<\/li>\n<p><img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"1188\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/10\/20261009135737-6ac8f2d17fceb.png\" width=\"1869\" \/><\/p>\n<\/p>\n<p>TCP \u63a5\u6536\u65b9\u662f\u6309\u5e8f\u63a5\u6536\u5b57\u8282\u6d41&#xff0c;\u53ea\u6709\u8865\u9f50\u5f53\u524d\u7f3a\u5931\u7684\u6700\u524d\u9762\u4e00\u6bb5&#xff0c;\u624d\u80fd\u7ee7\u7eed\u786e\u8ba4\u540e\u9762\u7684\u6570\u636e\u3002<\/p>\n<p>\u54ea\u6015\u540e\u9762\u7684\u62a5\u6587\u5df2\u7ecf\u5230\u8fbe\u63a5\u6536\u7f13\u51b2\u533a&#xff0c;\u53ea\u8981\u524d\u9762\u4e00\u6bb5\u7a7a\u7f3a&#xff0c;\u5c31\u4e0d\u4f1a\u4ea7\u751f\u66f4\u5927\u7684\u786e\u8ba4\u5e8f\u53f7&#xff0c;\u53ea\u4f1a\u4e0d\u65ad\u91cd\u590d \u201c\u6211\u7f3a\u5f53\u524d\u7a97\u53e3\u6700\u5f00\u5934\u8fd9\u4e00\u6bb5\u201d\u3002 \u6240\u4ee5&#xff1a;\u7a97\u53e3\u5185\u4efb\u610f\u4f4d\u7f6e\u4e22\u5305&#xff0c;\u90fd\u4f1a\u7b49\u4ef7\u4e8e\u5f53\u524d\u7a97\u53e3\u8d77\u70b9\u5904\u4e22\u5305&#xff0c;\u53ea\u9700\u8981\u91cd\u4f20\u7f3a\u5931\u7684\u8fd9\u4e00\u6bb5&#xff0c;\u4e0d\u9700\u8981\u91cd\u4f20\u6574\u4e2a\u7a97\u53e3\u5168\u90e8\u6570\u636e\u3002<\/p>\n<p>\u4e24\u79cd\u91cd\u4f20\u89e6\u53d1\u65b9\u5f0f<\/p>\n<li>\u5feb\u91cd\u4f20&#xff1a;\u6536\u5230 3 \u4e2a\u76f8\u540c\u7684\u91cd\u590d ACK&#xff0c;\u7acb\u523b\u91cd\u4f20\u4e22\u5931\u62a5\u6587&#xff0c;\u4e0d\u7b49\u5f85\u8d85\u65f6\u3002<\/li>\n<li>\u8d85\u65f6\u91cd\u4f20&#xff1a;\u515c\u5e95\u65b9\u6848&#xff0c;\u8fdf\u8fdf\u6536\u4e0d\u5230\u8db3\u591f\u91cd\u590d ACK&#xff0c;\u5b9a\u65f6\u5668\u5230\u671f\u540e\u91cd\u4f20\u3002<\/li>\n<h4>\u62e5\u585e\u63a7\u5236<\/h4>\n<\/p>\n<h4>\u5ef6\u65f6\u5e94\u7b54<\/h4>\n<\/p>\n<h4>\u634e\u5e26\u5e94\u7b54<\/h4>\n","protected":false},"excerpt":{"rendered":"<p>\u786e\u8ba4\u5e94\u7b54\u673a\u5236\u786e\u8ba4\u5e94\u7b54&#xff08;ACK&#xff0c;Acknowledge&#xff09;\u662f TCP \u5b9e\u73b0\u53ef\u9760\u4f20\u8f93\u6700\u57fa\u7840\u7684\u673a\u5236\u3002 \u53d1\u9001\u65b9\u53d1\u51fa\u6570\u636e\u540e&#xff0c;\u63a5\u6536\u65b9\u6536\u5230\u6570\u636e&#xff0c;\u8fd4\u56deACK \u786e\u8ba4\u62a5\u6587&#xff0c;\u544a\u8bc9\u53d1\u9001\u65b9&#xff1a;\u54ea\u4e9b\u6570\u636e\u6211\u5df2\u7ecf\u6210\u529f\u6536\u5230\u4e86\u3002TCP \u662f\u9762\u5411\u5b57\u8282\u6d41\u7684&#xff0c;\u4e0d\u662f\u6309\u62a5\u6587\u786e\u8ba4&#xff0c;\u800c\u662f\u6309\u5b57\u8282\u5e8f\u53f7\u786e\u8ba4\u3002 ACK \u62a5\u6587\u4e2d\u7684\u786e\u8ba4\u5e8f\u53f7\u542b\u4e49&#xff1a;\u786e\u8ba4\u5e8f\u53f7 N&#xff0c;\u8868\u793a\u3010\u5e8f\u53f7 N \u4e4b\u524d\u7684\u6240\u6709\u5b57\u8282&amp;<\/p>\n","protected":false},"author":2,"featured_media":114670,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[205,43,191],"topic":[],"class_list":["post-114688","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-server","tag-tcp-ip","tag-43","tag-191"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v20.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Linux\u4e4bTCP\u7406\u8bba\uff1c3\uff1e - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.wsisp.com\/helps\/114688.html\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Linux\u4e4bTCP\u7406\u8bba\uff1c3\uff1e - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\" \/>\n<meta property=\"og:description\" content=\"\u786e\u8ba4\u5e94\u7b54\u673a\u5236\u786e\u8ba4\u5e94\u7b54&#xff08;ACK&#xff0c;Acknowledge&#xff09;\u662f TCP \u5b9e\u73b0\u53ef\u9760\u4f20\u8f93\u6700\u57fa\u7840\u7684\u673a\u5236\u3002 \u53d1\u9001\u65b9\u53d1\u51fa\u6570\u636e\u540e&#xff0c;\u63a5\u6536\u65b9\u6536\u5230\u6570\u636e&#xff0c;\u8fd4\u56deACK \u786e\u8ba4\u62a5\u6587&#xff0c;\u544a\u8bc9\u53d1\u9001\u65b9&#xff1a;\u54ea\u4e9b\u6570\u636e\u6211\u5df2\u7ecf\u6210\u529f\u6536\u5230\u4e86\u3002TCP \u662f\u9762\u5411\u5b57\u8282\u6d41\u7684&#xff0c;\u4e0d\u662f\u6309\u62a5\u6587\u786e\u8ba4&#xff0c;\u800c\u662f\u6309\u5b57\u8282\u5e8f\u53f7\u786e\u8ba4\u3002 ACK \u62a5\u6587\u4e2d\u7684\u786e\u8ba4\u5e8f\u53f7\u542b\u4e49&#xff1a;\u786e\u8ba4\u5e8f\u53f7 N&#xff0c;\u8868\u793a\u3010\u5e8f\u53f7 N 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