{"id":76680,"date":"2026-02-23T00:49:27","date_gmt":"2026-02-22T16:49:27","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/76680.html"},"modified":"2026-02-23T00:49:27","modified_gmt":"2026-02-22T16:49:27","slug":"%e4%bb%80%e4%b9%88%e6%98%aftcp%e4%b8%89%e6%ac%a1%e6%8f%a1%e6%89%8b%e4%b8%8e%e5%9b%9b%e6%ac%a1%e6%8c%a5%e6%89%8b%ef%bc%9f%e4%b8%80%e7%af%87%e6%96%87%e7%ab%a0%e6%90%9e%e6%87%82%e5%85%b6%e5%a6%82","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/76680.html","title":{"rendered":"\u4ec0\u4e48\u662fTCP\u4e09\u6b21\u63e1\u624b\u4e0e\u56db\u6b21\u6325\u624b\uff1f\u4e00\u7bc7\u6587\u7ae0\u641e\u61c2\u5176\u5982\u4f55\u4fdd\u8bc1TCP\u534f\u8bae\u7684\u4f20\u8f93\u53ef\u9760\u6027"},"content":{"rendered":"<h3>TCP\u534f\u8bae\u901a\u4fe1\u6d41\u7a0b<\/h3>\n<p>TCP\u662f\u4e00\u4e2a\u9762\u5411\u8fde\u63a5\u7684&#xff0c;\u5b89\u5168\u7684&#xff0c;\u6d41\u5f0f\u4f20\u8f93\u534f\u8bae&#xff0c;\u8fd9\u4e2a\u534f\u8bae\u662f\u4e00\u4e2a\u4f20\u8f93\u5c42\u534f\u8bae\u3002<\/p>\n<ul>\n<li>\u9762\u5411\u8fde\u63a5&#xff1a;\u662f\u4e00\u4e2a\u53cc\u5411\u8fde\u63a5&#xff0c;\u901a\u8fc7\u4e09\u6b21\u63e1\u624b\u5b8c\u6210&#xff0c;\u65ad\u5f00\u8fde\u63a5\u9700\u8981\u901a\u8fc7\u56db\u6b21\u6325\u624b\u5b8c\u6210\u3002<\/li>\n<li>\u5b89\u5168&#xff1a;tcp\u901a\u4fe1\u8fc7\u7a0b\u4e2d&#xff0c;\u4f1a\u5bf9\u53d1\u9001\u7684\u6bcf\u4e00\u6570\u636e\u5305\u90fd\u4f1a\u8fdb\u884c\u6821\u9a8c, 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\u786e\u8ba4\u4e22\u5931\u6570\u636e\u3002<\/p>\n<p>seq \u548c ack \u7684\u8fd9\u4e2a\u4f5c\u7528&#xff0c;\u662f\u4ece\u4e09\u6b21\u63e1\u624b\u540c\u6b65\u521d\u59cb\u5e8f\u53f7\u540e\u624d\u6b63\u5f0f\u751f\u6548\u7684\u3002\u4e09\u6b21\u63e1\u624b\u7684\u6838\u5fc3\u5c31\u662f\u8ba9\u53cc\u65b9\u786e\u8ba4\u5f7c\u6b64\u7684\u521d\u59cb seq&#xff08;ISN&#xff09;&#xff0c;\u53ea\u6709\u521d\u59cb\u5e8f\u53f7\u540c\u6b65\u4e86&#xff0c;\u540e\u7eed\u6570\u636e\u4f20\u8f93\u7684 seq \u9012\u589e\u3001ack \u53cd\u9988\u624d\u6709\u7edf\u4e00\u7684\u57fa\u51c6&#xff0c;\u4e0a\u8ff0\u7684\u8fdb\u5ea6\u76d1\u63a7\u3001\u53bb\u91cd\u3001\u91cd\u4f20\u903b\u8f91\u624d\u80fd\u6b63\u5e38\u8fd0\u8f6c\u3002<\/p>\n<li>\u5e8f\u5217\u53f7&#xff08;seq&#xff09;\n<ul>\n<li>\u6807\u8bc6\u5f53\u524d\u62a5\u6587\u672c\u8eab\u7684\u8d77\u59cb\u7f16\u53f7&#xff0c;\u662f\u4e00\u4e2a\u968f\u673a\u751f\u6210\u7684 32 \u4f4d\u6574\u6570&#xff08;\u79f0\u4e3a\u521d\u59cb\u5e8f\u5217\u53f7 ISN&#xff09;\u3002<\/li>\n<li>\u540e\u7eed\u4f20\u8f93\u6570\u636e\u65f6&#xff0c;\u6bcf\u4e2a\u5b57\u8282\u90fd\u4f1a\u88ab\u5206\u914d\u4e00\u4e2a\u5e8f\u53f7&#xff0c;seq \u5c31\u662f\u5f53\u524d\u62a5\u6587\u7b2c\u4e00\u4e2a\u5b57\u8282\u7684\u7f16\u53f7\u3002<\/li>\n<li>\u4e09\u6b21\u63e1\u624b\u9636\u6bb5&#xff0c;seq \u7528\u4e8e\u540c\u6b65\u53cc\u65b9\u7684\u521d\u59cb\u5e8f\u53f7\u57fa\u51c6\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\u786e\u8ba4\u53f7&#xff08;ack&#xff09;\n<ul>\n<li>\u6807\u8bc6\u671f\u671b\u6536\u5230\u7684\u4e0b\u4e00\u4e2a\u5b57\u8282\u7684\u5e8f\u53f7&#xff0c;\u7b49\u4e8e\u5df2\u6210\u529f\u63a5\u6536\u7684\u6700\u9ad8\u5e8f\u53f7 &#043; 1\u3002<\/li>\n<li>\u53ea\u6709\u5f53\u62a5\u6587\u4e2d\u7684 ACK&#061;1 \u65f6&#xff0c;ack \u5b57\u6bb5\u624d\u6709\u6548&#xff1b;ACK&#061;0 \u65f6&#xff0c;ack \u65e0\u610f\u4e49\u3002<\/li>\n<li>\u4e09\u6b21\u63e1\u624b\u9636\u6bb5&#xff0c;ack \u7528\u4e8e\u544a\u8bc9\u5bf9\u65b9 \u201c\u6211\u5df2\u6536\u5230\u4f60\u7684\u62a5\u6587&#xff0c;\u8bf7\u4f60\u4e0b\u6b21\u4ece\u8fd9\u4e2a\u5e8f\u53f7\u5f00\u59cb\u53d1\u9001\u201d\u3002<\/li>\n<\/ul>\n<\/li>\n<p>\u4e09\u6b21\u63e1\u624b\u7684\u6838\u5fc3\u76ee\u6807\u4e4b\u4e00&#xff0c;\u662f\u8ba9\u5ba2\u6237\u7aef\u548c\u670d\u52a1\u7aef\u90fd\u786e\u8ba4 \u201c\u5bf9\u65b9\u80fd\u6b63\u5e38\u53d1&#xff0c;\u6211\u80fd\u6b63\u5e38\u6536&#xff1b;\u6211\u80fd\u6b63\u5e38\u53d1&#xff0c;\u5bf9\u65b9\u80fd\u6b63\u5e38\u6536\u201d\u3002\u800c seq \u548c ack \u5c31\u662f\u9a8c\u8bc1\u8fd9\u4e2a\u80fd\u529b\u7684\u5173\u952e&#xff1a;<\/p>\n<ul>\n<li>\u670d\u52a1\u7aef\u80fd\u6b63\u786e\u8fd4\u56de ack&#061;x&#043;1&#xff0c;\u8bf4\u660e\u5ba2\u6237\u7aef\u7684\u53d1\u9001\u80fd\u529b\u6b63\u5e38&#xff08;\u670d\u52a1\u7aef\u6536\u5230\u4e86\u5ba2\u6237\u7aef\u7684 SYN \u62a5\u6587&#xff09;&#xff0c;\u4e14\u670d\u52a1\u7aef\u7684\u53d1\u9001\u80fd\u529b\u6b63\u5e38&#xff08;\u80fd\u53d1\u51fa\u5e26 ack \u7684\u62a5\u6587&#xff09;\u3002<\/li>\n<li>\u5ba2\u6237\u7aef\u80fd\u6b63\u786e\u8fd4\u56de ack&#061;y&#043;1&#xff0c;\u8bf4\u660e\u670d\u52a1\u7aef\u7684\u53d1\u9001\u80fd\u529b\u6b63\u5e38&#xff08;\u5ba2\u6237\u7aef\u6536\u5230\u4e86\u670d\u52a1\u7aef\u7684 SYN&#043;ACK \u62a5\u6587&#xff09;&#xff0c;\u4e14\u5ba2\u6237\u7aef\u7684\u786e\u8ba4\u80fd\u529b\u6b63\u5e38\u3002<\/li>\n<\/ul>\n<p>\u5982\u679c\u6ca1\u6709 seq \u548c ack&#xff0c;\u53cc\u65b9\u53ea\u80fd\u786e\u8ba4 \u201c\u62a5\u6587\u6536\u5230\u4e86\u201d&#xff0c;\u4f46\u65e0\u6cd5\u786e\u8ba4 \u201c\u540e\u7eed\u6570\u636e\u8be5\u600e\u4e48\u7f16\u53f7\u201d&#xff0c;\u66f4\u65e0\u6cd5\u9a8c\u8bc1\u5b8c\u6574\u7684\u6536\u53d1\u94fe\u8def\u3002<\/p>\n<p>\u5982\u679c\u4e09\u6b21\u63e1\u624b\u4e0d\u643a\u5e26\u8fd9\u4e24\u4e2a\u5b57\u6bb5&#xff0c;TCP \u8fde\u63a5\u4f1a\u5b58\u5728\u7684\u81f4\u547d\u95ee\u9898&#xff1a;<\/p>\n<li>\u6570\u636e\u4f20\u8f93\u65e0\u5e8f&#xff1a;\u540e\u7eed\u53d1\u9001\u7684\u62a5\u6587\u6bb5\u6ca1\u6709\u7f16\u53f7&#xff0c;\u63a5\u6536\u65b9\u65e0\u6cd5\u5224\u65ad\u62a5\u6587\u7684\u5148\u540e\u987a\u5e8f&#xff0c;\u53ef\u80fd\u51fa\u73b0 \u201c\u540e\u53d1\u7684\u6570\u636e\u5148\u5230\u201d \u7684\u6df7\u4e71\u3002<\/li>\n<li>\u65e0\u6cd5\u91cd\u4f20\u548c\u53bb\u91cd&#xff1a;\u63a5\u6536\u65b9\u65e0\u6cd5\u786e\u8ba4\u54ea\u4e9b\u6570\u636e\u4e22\u4e86\u3001\u54ea\u4e9b\u6570\u636e\u91cd\u590d\u4e86&#xff0c;TCP \u7684\u53ef\u9760\u4f20\u8f93\u5c31\u65e0\u4ece\u8c08\u8d77\u3002<\/li>\n<li>\u65e7\u8fde\u63a5\u8bf7\u6c42\u6cdb\u6ee5&#xff1a;\u5927\u91cf\u5931\u6548\u7684\u65e7 SYN \u62a5\u6587\u4f1a\u5efa\u7acb\u65e0\u6548\u8fde\u63a5&#xff0c;\u8017\u5c3d\u670d\u52a1\u7aef\u8d44\u6e90\u3002<\/li>\n<h4>\u56db\u6b21\u6325\u624b<\/h4>\n<p>TCP \u662f\u5168\u53cc\u5de5\u901a\u4fe1&#xff08;\u53cc\u65b9\u53ef\u540c\u65f6\u6536\u53d1\u6570\u636e&#xff09;&#xff0c;\u5173\u95ed\u8fde\u63a5\u65f6&#xff0c;\u9700\u8981\u53cc\u65b9\u5206\u522b\u5173\u95ed\u81ea\u5df1\u7684\u53d1\u9001\u901a\u9053&#xff0c;\u56e0\u6b64\u9700\u8981\u56db\u6b21\u4ea4\u4e92\u3002<\/p>\n<p>\u6838\u5fc3\u524d\u63d0<\/p>\n<ul>\n<li>\u8fde\u63a5\u5173\u95ed\u53ef\u7531\u5ba2\u6237\u7aef\u6216\u670d\u52a1\u7aef\u4e3b\u52a8\u53d1\u8d77&#xff0c;\u4ee5\u4e0b\u4ee5\u5ba2\u6237\u7aef\u4e3b\u52a8\u5173\u95ed\u4e3a\u4f8b\u3002<\/li>\n<li>TCP \u62a5\u6587\u7684 FIN \u6807\u5fd7\u4f4d\u8868\u793a \u201c\u6570\u636e\u53d1\u9001\u5b8c\u6bd5&#xff0c;\u8bf7\u6c42\u5173\u95ed\u53d1\u9001\u901a\u9053\u201d\u3002<\/li>\n<\/ul>\n<li>\u7b2c\u4e00\u6b21\u6325\u624b&#xff08;\u5ba2\u6237\u7aef \u2192 \u670d\u52a1\u7aef&#xff09;\n<ul>\n<li>\u5ba2\u6237\u7aef\u4e3b\u52a8\u5173\u95ed\u8fde\u63a5&#xff0c;\u5411\u670d\u52a1\u7aef\u53d1\u9001 FIN \u62a5\u6587&#xff0c;\u62a5\u6587\u5173\u952e\u5b57\u6bb5&#xff1a;\n<ul>\n<li>FIN&#061;1&#xff1a;\u8868\u793a\u5ba2\u6237\u7aef\u6ca1\u6709\u6570\u636e\u8981\u53d1\u9001\u4e86&#xff0c;\u8bf7\u6c42\u5173\u95ed\u53d1\u9001\u901a\u9053\u3002<\/li>\n<li>seq&#061;u&#xff1a;\u5ba2\u6237\u7aef\u5f53\u524d\u7684\u5e8f\u5217\u53f7&#xff08;\u7d2f\u8ba1\u4e4b\u524d\u4f20\u8f93\u7684\u6570\u636e\u540e\u7684\u5e8f\u53f7&#xff09;\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\u5ba2\u6237\u7aef\u8fdb\u5165 FIN_WAIT_1 \u72b6\u6001&#xff0c;\u7b49\u5f85\u670d\u52a1\u7aef\u7684\u786e\u8ba4\u3002<\/li>\n<li>\u4f5c\u7528&#xff1a;\u5ba2\u6237\u7aef\u544a\u8bc9\u670d\u52a1\u7aef \u201c\u6211\u4e0d\u518d\u5411\u4f60\u53d1\u9001\u6570\u636e\u4e86\u201d\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\u7b2c\u4e8c\u6b21\u6325\u624b&#xff08;\u670d\u52a1\u7aef \u2192 \u5ba2\u6237\u7aef&#xff09;\n<ul>\n<li>\u670d\u52a1\u7aef\u6536\u5230 FIN \u62a5\u6587\u540e&#xff0c;\u5411\u5ba2\u6237\u7aef\u56de\u590d ACK \u62a5\u6587&#xff0c;\u62a5\u6587\u5173\u952e\u5b57\u6bb5&#xff1a;\n<ul>\n<li>ACK&#061;1&#xff1a;\u786e\u8ba4\u6807\u5fd7\u4f4d\u3002<\/li>\n<li>ack&#061;u&#043;1&#xff1a;\u786e\u8ba4\u53f7&#xff0c;\u7b49\u4e8e\u5ba2\u6237\u7aef\u7684 FIN \u5e8f\u5217\u53f7 &#043; 1\u3002<\/li>\n<li>seq&#061;v&#xff1a;\u670d\u52a1\u7aef\u5f53\u524d\u7684\u5e8f\u5217\u53f7\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\u670d\u52a1\u7aef\u8fdb\u5165 CLOSE_WAIT \u72b6\u6001&#xff1b;\u5ba2\u6237\u7aef\u6536\u5230 ACK \u540e\u8fdb\u5165 FIN_WAIT_2 \u72b6\u6001\u3002<\/li>\n<li>\u4f5c\u7528&#xff1a;\u670d\u52a1\u7aef\u544a\u8bc9\u5ba2\u6237\u7aef \u201c\u6211\u5df2\u6536\u5230\u4f60\u7684\u5173\u95ed\u8bf7\u6c42&#xff0c;\u4f60\u53ef\u4ee5\u505c\u6b62\u53d1\u9001\u6570\u636e\u4e86&#xff0c;\u4f46\u6211\u53ef\u80fd\u8fd8\u6709\u6570\u636e\u8981\u53d1\u7ed9\u4f60\u201d\u3002<\/li>\n<li>\u6b64\u65f6\u5ba2\u6237\u7aef\u5230\u670d\u52a1\u7aef\u7684\u53d1\u9001\u901a\u9053\u5df2\u5173\u95ed&#xff0c;\u4f46\u670d\u52a1\u7aef\u5230\u5ba2\u6237\u7aef\u7684\u53d1\u9001\u901a\u9053\u4ecd\u53ef\u4f20\u8f93\u6570\u636e\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\u7b2c\u4e09\u6b21\u6325\u624b&#xff08;\u670d\u52a1\u7aef \u2192 \u5ba2\u6237\u7aef&#xff09;\n<ul>\n<li>\u670d\u52a1\u7aef\u5c06\u5269\u4f59\u6570\u636e\u53d1\u9001\u5b8c\u6bd5\u540e&#xff0c;\u5411\u5ba2\u6237\u7aef\u53d1\u9001 FIN \u62a5\u6587&#xff0c;\u62a5\u6587\u5173\u952e\u5b57\u6bb5&#xff1a;\n<ul>\n<li>FIN&#061;1&#xff1a;\u8868\u793a\u670d\u52a1\u7aef\u4e5f\u6ca1\u6709\u6570\u636e\u8981\u53d1\u9001\u4e86&#xff0c;\u8bf7\u6c42\u5173\u95ed\u81ea\u5df1\u7684\u53d1\u9001\u901a\u9053\u3002<\/li>\n<li>ACK&#061;1&#xff1a;\u786e\u8ba4\u6807\u5fd7\u4f4d\u3002<\/li>\n<li>ack&#061;u&#043;1&#xff1a;\u6cbf\u7528\u4e4b\u524d\u7684\u786e\u8ba4\u53f7\u3002<\/li>\n<li>seq&#061;w&#xff1a;\u670d\u52a1\u7aef\u53d1\u9001\u5b8c\u5269\u4f59\u6570\u636e\u540e\u7684\u5e8f\u5217\u53f7\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\u670d\u52a1\u7aef\u8fdb\u5165 LAST_ACK \u72b6\u6001&#xff0c;\u7b49\u5f85\u5ba2\u6237\u7aef\u7684\u786e\u8ba4\u3002<\/li>\n<li>\u4f5c\u7528&#xff1a;\u670d\u52a1\u7aef\u544a\u8bc9\u5ba2\u6237\u7aef \u201c\u6211\u4e5f\u6ca1\u6709\u6570\u636e\u8981\u53d1\u9001\u4e86&#xff0c;\u8bf7\u6c42\u5173\u95ed\u6211\u5230\u4f60\u7684\u53d1\u9001\u901a\u9053\u201d\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\u7b2c\u56db\u6b21\u6325\u624b&#xff08;\u5ba2\u6237\u7aef \u2192 \u670d\u52a1\u7aef&#xff09;\n<ul>\n<li>\u5ba2\u6237\u7aef\u6536\u5230 FIN \u62a5\u6587\u540e&#xff0c;\u5411\u670d\u52a1\u7aef\u56de\u590d ACK \u62a5\u6587&#xff0c;\u62a5\u6587\u5173\u952e\u5b57\u6bb5&#xff1a;\n<ul>\n<li>ACK&#061;1&#xff1a;\u786e\u8ba4\u6807\u5fd7\u4f4d\u3002<\/li>\n<li>ack&#061;w&#043;1&#xff1a;\u786e\u8ba4\u53f7&#xff0c;\u7b49\u4e8e\u670d\u52a1\u7aef\u7684 FIN \u5e8f\u5217\u53f7 &#043; 1\u3002<\/li>\n<li>seq&#061;u&#043;1&#xff1a;\u5ba2\u6237\u7aef\u5f53\u524d\u7684\u5e8f\u5217\u53f7\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\u5ba2\u6237\u7aef\u53d1\u9001 ACK \u540e\u8fdb\u5165 TIME_WAIT \u72b6\u6001&#xff08;\u7b49\u5f85 2MSL \u65f6\u95f4\u540e\u624d\u4f1a\u8fdb\u5165 CLOSED \u72b6\u6001&#xff09;&#xff1b;\u670d\u52a1\u7aef\u6536\u5230 ACK \u540e\u76f4\u63a5\u8fdb\u5165 CLOSED \u72b6\u6001\u3002<\/li>\n<li>\u4f5c\u7528&#xff1a;\u5ba2\u6237\u7aef\u544a\u8bc9\u670d\u52a1\u7aef \u201c\u6211\u5df2\u6536\u5230\u4f60\u7684\u5173\u95ed\u8bf7\u6c42&#xff0c;\u8fde\u63a5\u5373\u5c06\u5b8c\u5168\u5173\u95ed\u201d\u3002<\/li>\n<\/ul>\n<\/li>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/02\/20260222164925-699b3395c9c72.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<h5>TIME_WAIT \u72b6\u6001\u4e0e 2MSL<\/h5>\n<ul>\n<li>MgSL&#xff08;Maximum Segment Lifetime&#xff09;&#xff1a;\u62a5\u6587\u5728\u7f51\u7edc\u4e2d\u7684\u6700\u5927\u751f\u5b58\u65f6\u95f4&#xff0c;\u8d85\u8fc7\u8be5\u65f6\u95f4\u62a5\u6587\u4f1a\u88ab\u4e22\u5f03\u3002<\/li>\n<li>\u5ba2\u6237\u7aef\u53d1\u9001\u7b2c\u56db\u6b21 ACK \u540e&#xff0c;\u9700\u8981\u7b49\u5f85 2MSL \u65f6\u95f4&#xff1a;\n<li>\u786e\u4fdd\u670d\u52a1\u7aef\u80fd\u6536\u5230\u7b2c\u56db\u6b21\u7684 ACK \u62a5\u6587\u3002\u5982\u679c\u670d\u52a1\u7aef\u6ca1\u6536\u5230&#xff0c;\u4f1a\u91cd\u53d1\u7b2c\u4e09\u6b21\u7684 FIN \u62a5\u6587&#xff0c;\u5ba2\u6237\u7aef\u5728 2MSL \u5185\u6536\u5230\u540e\u4f1a\u91cd\u65b0\u53d1\u9001 ACK&#xff0c;\u5e76\u5237\u65b0\u7b49\u5f85\u65f6\u95f4\u3002<\/li>\n<li>\u786e\u4fdd\u672c\u6b21\u8fde\u63a5\u7684\u6240\u6709\u62a5\u6587\u90fd\u4ece\u7f51\u7edc\u4e2d\u6d88\u5931&#xff0c;\u907f\u514d\u65b0\u8fde\u63a5\u6536\u5230\u65e7\u8fde\u63a5\u7684\u6b8b\u7559\u62a5\u6587\u3002<\/li>\n<\/li>\n<\/ul>\n<h5>\u4e3a\u4ec0\u4e48\u8981\u56db\u6b21\u6325\u624b&#xff0c;\u4e09\u6b21\u6325\u624b\u53ef\u4ee5\u5417&#xff1f;<\/h5>\n<p>TCP \u8fde\u63a5\u662f\u5168\u53cc\u5de5\u7684&#xff0c;\u610f\u5473\u7740\u5ba2\u6237\u7aef\u548c\u670d\u52a1\u7aef\u53ef\u4ee5\u540c\u65f6\u53cc\u5411\u6536\u53d1\u6570\u636e&#xff0c;\u4e24\u4e2a\u65b9\u5411\u7684\u6570\u636e\u6d41\u662f\u76f8\u4e92\u72ec\u7acb\u7684\u3002\u5173\u95ed\u8fde\u63a5\u4e0d\u662f 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\u5ba2\u6237\u7aef<\/td>\n<td>ACK<\/td>\n<td>\u670d\u52a1\u7aef\u8bf4&#xff1a;\u6211\u6536\u5230\u4f60\u7684\u5173\u95ed\u8bf7\u6c42\u4e86&#xff0c;\u6211\u8fd8\u6709\u6570\u636e\u8981\u53d1&#xff0c;\u4f60\u7b49\u6211\u53d1\u5b8c<\/td>\n<\/tr>\n<tr>\n<td>3<\/td>\n<td>\u670d\u52a1\u7aef \u2192 \u5ba2\u6237\u7aef<\/td>\n<td>FIN<\/td>\n<td>\u670d\u52a1\u7aef\u8bf4&#xff1a;\u6211\u4e5f\u4e0d\u7ed9\u4f60\u53d1\u6570\u636e\u4e86&#xff08;\u5173\u95ed\u81ea\u5df1\u7684\u53d1\u9001\u901a\u9053&#xff09;<\/td>\n<\/tr>\n<tr>\n<td>4<\/td>\n<td>\u5ba2\u6237\u7aef \u2192 \u670d\u52a1\u7aef<\/td>\n<td>ACK<\/td>\n<td>\u5ba2\u6237\u7aef\u8bf4&#xff1a;\u6211\u6536\u5230\u4f60\u7684\u5173\u95ed\u8bf7\u6c42\u4e86&#xff0c;\u8fde\u63a5\u53ef\u4ee5\u5f7b\u5e95\u5173\u95ed\u4e86<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<ul>\n<li>\u4e09\u6b21\u6325\u624b&#xff1a;\u6307\u5efa\u7acb\u8fde\u63a5\u65f6&#xff0c;\u53ea\u9700\u8981\u53cc\u65b9\u786e\u8ba4 \u201c\u6536\u53d1\u80fd\u529b\u6b63\u5e38 &#043; 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