{"id":72104,"date":"2026-02-04T22:18:18","date_gmt":"2026-02-04T14:18:18","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/72104.html"},"modified":"2026-02-04T22:18:18","modified_gmt":"2026-02-04T14:18:18","slug":"%e8%ae%a1%e7%ae%97%e6%9c%ba%e7%bd%91%e7%bb%9c%e5%9f%ba%e7%a1%80%ef%bc%9atcp-%e7%9a%84%e6%8b%a5%e5%a1%9e%e6%8e%a7%e5%88%b6","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/72104.html","title":{"rendered":"\u8ba1\u7b97\u673a\u7f51\u7edc\u57fa\u7840\uff1aTCP \u7684\u62e5\u585e\u63a7\u5236"},"content":{"rendered":"<\/p>\n<h4>&#x1f4cc;\u76ee\u5f55<\/h4>\n<ul>\n<li>&#x1f6a6; TCP\u7684\u62e5\u585e\u63a7\u5236&#xff1a;\u7f51\u7edc\u7ea7\u7684\u201c\u4ea4\u901a\u7ba1\u5236\u7cfb\u7edf\u201d<\/li>\n<li>\n<ul>\n<li>&#x1f50d; \u4e00\u3001\u6838\u5fc3\u5b9a\u4e49\u4e0e\u672c\u8d28&#xff1a;\u7f51\u7edc\u7ea7\u901f\u7387\u9002\u914d\u7684\u6838\u5fc3\u903b\u8f91<\/li>\n<li>\n<ul>\n<li>&#xff08;\u4e00&#xff09;\u6743\u5a01\u5b9a\u4e49<\/li>\n<li>&#xff08;\u4e8c&#xff09;\u6838\u5fc3\u672c\u8d28<\/li>\n<li>&#xff08;\u4e09&#xff09;\u6838\u5fc3\u76ee\u6807&#xff08;\u56db\u5927\u6838\u5fc3&#xff09;<\/li>\n<li>&#xff08;\u56db&#xff09;\u6838\u5fc3\u4ef7\u503c<\/li>\n<\/ul>\n<\/li>\n<li>&#x1f9e9; \u4e8c\u3001TCP\u62e5\u585e\u63a7\u5236\u7684\u6838\u5fc3\u5b9e\u73b0\u673a\u5236&#xff1a;\u62e5\u585e\u7a97\u53e3\u4e3b\u5bfc\u7684\u56db\u9636\u6bb5\u903b\u8f91<\/li>\n<li>\n<ul>\n<li>&#xff08;\u4e00&#xff09;\u6838\u5fc3\u8f7d\u4f53&#xff1a;\u62e5\u585e\u7a97\u53e3&#xff08;Congestion Window, cwnd&#xff09;<\/li>\n<li>\n<ul>\n<li>\u5173\u952e\u7ec6\u8282&#xff1a;<\/li>\n<\/ul>\n<\/li>\n<li>&#xff08;\u4e8c&#xff09;\u9636\u6bb51&#xff1a;\u6162\u542f\u52a8&#xff08;Slow Start&#xff09;\u2014\u2014 \u8bd5\u63a2\u7f51\u7edc\u5e26\u5bbd\u7684\u201c\u542f\u52a8\u9636\u6bb5\u201d<\/li>\n<li>\n<ul>\n<li>1. \u6838\u5fc3\u89c4\u5219<\/li>\n<li>2. \u793a\u4f8b&#xff08;\u521d\u59cbcwnd&#061;2 MSS&#xff0c;ssthresh&#061;8 MSS&#xff09;<\/li>\n<li>3. \u6838\u5fc3\u76ee\u7684<\/li>\n<\/ul>\n<\/li>\n<li>&#xff08;\u4e09&#xff09;\u9636\u6bb52&#xff1a;\u62e5\u585e\u907f\u514d&#xff08;Congestion Avoidance&#xff09;\u2014\u2014 \u7a33\u5b9a\u5229\u7528\u5e26\u5bbd\u7684\u201c\u5e73\u7a33\u9636\u6bb5\u201d<\/li>\n<li>\n<ul>\n<li>1. \u6838\u5fc3\u89c4\u5219<\/li>\n<li>2. \u793a\u4f8b&#xff08;cwnd&#061;8 MSS&#xff0c;ssthresh&#061;8 MSS&#xff09;<\/li>\n<li>3. \u6838\u5fc3\u76ee\u7684<\/li>\n<\/ul>\n<\/li>\n<li>&#xff08;\u56db&#xff09;\u9636\u6bb53&#xff1a;\u5feb\u901f\u91cd\u4f20&#xff08;Fast Retransmit&#xff09;\u2014\u2014 \u62e5\u5835\u4fe1\u53f7\u7684\u201c\u5feb\u901f\u54cd\u5e94\u673a\u5236\u201d<\/li>\n<li>\n<ul>\n<li>1. \u6838\u5fc3\u89e6\u53d1\u6761\u4ef6<\/li>\n<li>2. \u6838\u5fc3\u64cd\u4f5c<\/li>\n<li>3. \u4f18\u52bf<\/li>\n<\/ul>\n<\/li>\n<li>&#xff08;\u4e94&#xff09;\u9636\u6bb54&#xff1a;\u5feb\u901f\u6062\u590d&#xff08;Fast Recovery&#xff09;\u2014\u2014 \u8f7b\u5fae\u62e5\u5835\u540e\u7684\u201c\u901f\u7387\u6062\u590d\u673a\u5236\u201d<\/li>\n<li>\n<ul>\n<li>1. \u6838\u5fc3\u64cd\u4f5c&#xff08;\u7ecf\u5178Reno\u7b97\u6cd5&#xff09;<\/li>\n<li>2. \u793a\u4f8b&#xff08;\u5f53\u524dcwnd&#061;10 MSS&#xff0c;ssthresh&#061;8 MSS&#xff0c;\u89e6\u53d1\u5feb\u901f\u91cd\u4f20&#xff09;<\/li>\n<\/ul>\n<\/li>\n<li>&#xff08;\u516d&#xff09;\u8865\u5145&#xff1a;\u8d85\u65f6\u91cd\u4f20\u89e6\u53d1\u7684\u201c\u4e25\u91cd\u62e5\u5835\u5904\u7406\u201d<\/li>\n<\/ul>\n<\/li>\n<li>&#x1f4cc; \u4e09\u3001TCP\u62e5\u585e\u63a7\u5236\u7684\u5b8c\u6574\u5de5\u4f5c\u95ed\u73af&#xff08;\u573a\u666f\u5316\u62c6\u89e3&#xff09;<\/li>\n<li>\n<ul>\n<li>&#xff08;\u4e00&#xff09;\u573a\u666f1&#xff1a;\u6b63\u5e38\u573a\u666f&#xff08;\u7f51\u7edc\u7a7a\u95f2&#xff0c;\u65e0\u62e5\u5835&#xff09;<\/li>\n<li>&#xff08;\u4e8c&#xff09;\u573a\u666f2&#xff1a;\u8f7b\u5fae\u62e5\u5835\u573a\u666f&#xff08;\u89e6\u53d1\u5feb\u901f\u91cd\u4f20\/\u5feb\u901f\u6062\u590d&#xff09;<\/li>\n<li>&#xff08;\u4e09&#xff09;\u573a\u666f3&#xff1a;\u4e25\u91cd\u62e5\u5835\u573a\u666f&#xff08;\u89e6\u53d1\u8d85\u65f6\u91cd\u4f20&#xff09;<\/li>\n<\/ul>\n<\/li>\n<li>&#x1f3af; \u56db\u3001TCP\u62e5\u585e\u63a7\u5236\u4e0e\u6d41\u91cf\u63a7\u5236\u7684\u6838\u5fc3\u533a\u522b&#xff08;\u6613\u6df7\u70b9\u7ec8\u6781\u8fa8\u6790&#xff09;<\/li>\n<li>\n<ul>\n<li>&#xff08;\u4e00&#xff09;\u6838\u5fc3\u533a\u522b\u5bf9\u6bd4\u8868<\/li>\n<li>&#xff08;\u4e8c&#xff09;\u901a\u4fd7\u8fa8\u6790&#xff08;\u4e00\u53e5\u8bdd\u5403\u900f&#xff09;<\/li>\n<li>&#xff08;\u4e09&#xff09;\u534f\u540c\u793a\u4f8b&#xff08;\u5b9e\u9645\u53d1\u9001\u901f\u7387\u7684\u51b3\u5b9a\u903b\u8f91&#xff09;<\/li>\n<\/ul>\n<\/li>\n<li>&#x1f4ca; \u4e94\u3001TCP\u62e5\u585e\u63a7\u5236\u7684\u5178\u578b\u5e94\u7528\u573a\u666f&#xff1a;\u9002\u914d\u590d\u6742\u7f51\u7edc\u73af\u5883<\/li>\n<li>\n<ul>\n<li>&#xff08;\u4e00&#xff09;\u573a\u666f1&#xff1a;\u5e7f\u57df\u7f51\u901a\u4fe1&#xff08;\u8de8\u57ce\u3001\u8de8\u56fd\u94fe\u8def&#xff09;<\/li>\n<li>&#xff08;\u4e8c&#xff09;\u573a\u666f2&#xff1a;\u79fb\u52a8\u7f51\u7edc\u901a\u4fe1&#xff08;4G\/5G\u3001\u7269\u8054\u7f51&#xff09;<\/li>\n<li>&#xff08;\u4e09&#xff09;\u573a\u666f3&#xff1a;\u6570\u636e\u4e2d\u5fc3\u5185\u90e8\u901a\u4fe1&#xff08;\u670d\u52a1\u5668\u96c6\u7fa4&#xff09;<\/li>\n<li>&#xff08;\u56db&#xff09;\u573a\u666f4&#xff1a;\u9ad8\u5e76\u53d1\u7f51\u7edc\u573a\u666f&#xff08;\u7535\u5546\u79d2\u6740\u3001\u76f4\u64ad&#xff09;<\/li>\n<li>&#xff08;\u4e94&#xff09;\u573a\u666f5&#xff1a;\u4f4e\u5e26\u5bbd\u7f51\u7edc\u573a\u666f&#xff08;\u4e61\u6751\u5bbd\u5e26\u3001\u536b\u661f\u901a\u4fe1&#xff09;<\/li>\n<\/ul>\n<\/li>\n<li>&#x1f6a8; \u516d\u3001TCP\u62e5\u585e\u63a7\u5236\u7684\u6f5c\u5728\u95ee\u9898\u4e0e\u4f18\u5316\u65b9\u6848&#xff08;\u7ecf\u5178\u7b97\u6cd5\u5347\u7ea7&#xff09;<\/li>\n<li>\n<ul>\n<li>&#xff08;\u4e00&#xff09;\u6838\u5fc3\u6f5c\u5728\u95ee\u9898&#xff08;\u7ecf\u5178Reno\u7b97\u6cd5\u7684\u77ed\u677f&#xff09;<\/li>\n<li>&#xff08;\u4e8c&#xff09;\u4e3b\u6d41\u4f18\u5316\u65b9\u6848&#xff08;\u9ad8\u6027\u80fd\u62e5\u585e\u63a7\u5236\u7b97\u6cd5&#xff09;<\/li>\n<li>\n<ul>\n<li>1. BBR\u7b97\u6cd5&#xff08;Bottleneck Bandwidth and RTT&#xff0c;\u8c37\u6b4c\u63d0\u51fa&#xff09;<\/li>\n<li>2. CUBIC\u7b97\u6cd5&#xff08;Linux\u9ed8\u8ba4\u7b97\u6cd5&#xff09;<\/li>\n<li>3. SACK\u914d\u5408\u4f18\u5316&#xff08;\u9009\u62e9\u6027\u786e\u8ba4&#xff09;<\/li>\n<li>4. \u7a97\u53e3\u6269\u5927\u56e0\u5b50&#xff08;Window Scale&#xff09;<\/li>\n<li>5. \u6162\u542f\u52a8\u9608\u503c\u4f18\u5316&#xff08;ssthresh\u52a8\u6001\u8c03\u6574&#xff09;<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<li>&#x1f4cb; \u603b\u7ed3&#xff1a;\u6838\u5fc3\u8109\u7edc\u4e0e\u5b66\u4e60\u6307\u5bfc<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<hr \/>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/02\/20260204141817-69835529691e5.gif\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<hr \/>\n<h2>&#x1f6a6; TCP\u7684\u62e5\u585e\u63a7\u5236&#xff1a;\u7f51\u7edc\u7ea7\u7684\u201c\u4ea4\u901a\u7ba1\u5236\u7cfb\u7edf\u201d<\/h2>\n<p>TCP\u62e5\u585e\u63a7\u5236\u662fTCP\u534f\u8bae\u4fdd\u969c\u7f51\u7edc\u7a33\u5b9a\u8fd0\u884c\u7684\u6838\u5fc3\u673a\u5236&#xff0c;\u6838\u5fc3\u8bbe\u8ba1\u7406\u5ff5\u662f\u201c\u8ba9\u53d1\u9001\u7aef\u7684\u53d1\u9001\u901f\u7387&#xff0c;\u7cbe\u51c6\u5339\u914d\u7f51\u7edc\u7684\u5b9e\u9645\u627f\u8f7d\u80fd\u529b\u201d&#xff0c;\u907f\u514d\u56e0\u53d1\u9001\u7aef\u76f2\u76ee\u9ad8\u901f\u53d1\u9001&#xff0c;\u5bfc\u81f4\u7f51\u7edc\u4e2d\u6570\u636e\u5305\u6392\u961f\u3001\u5ef6\u8fdf\u6fc0\u589e\u3001\u4e22\u5305\u52a0\u5267&#xff08;\u5373\u201c\u7f51\u7edc\u62e5\u585e\u201d&#xff09;&#xff0c;\u6700\u7ec8\u5b9e\u73b0\u201c\u7f51\u7edc\u541e\u5410\u91cf\u6700\u5927\u5316\u3001\u5ef6\u8fdf\u6700\u5c0f\u5316\u3001\u4e22\u5305\u7387\u6700\u4f4e\u201d\u7684\u4f20\u8f93\u5e73\u8861\u3002<\/p>\n<p>\u5b83\u5c31\u50cf\u57ce\u5e02\u9053\u8def\u7684\u201c\u4ea4\u901a\u7ba1\u5236\u7cfb\u7edf\u201d\u2014\u2014\u53d1\u9001\u7aef\u662f\u884c\u9a76\u7684\u8f66\u8f86&#xff0c;\u7f51\u7edc\u94fe\u8def&#xff08;\u8def\u7531\u5668\u3001\u4ea4\u6362\u673a&#xff09;\u662f\u9053\u8def&#xff0c;\u62e5\u585e\u63a7\u5236\u5c31\u662f\u4ea4\u901a\u4fe1\u53f7\u706f\u548c\u4ea4\u8b66&#xff0c;\u901a\u8fc7\u52a8\u6001\u8c03\u8282\u8f66\u8f86\u884c\u9a76\u901f\u5ea6&#xff08;\u53d1\u9001\u901f\u7387&#xff09;&#xff0c;\u907f\u514d\u9053\u8def\u62e5\u5835&#xff08;\u6570\u636e\u5305\u6392\u961f&#xff09;\u3001\u4ea4\u901a\u4e8b\u6545&#xff08;\u4e22\u5305&#xff09;&#xff0c;\u786e\u4fdd\u6240\u6709\u8f66\u8f86&#xff08;\u6570\u636e\u5305&#xff09;\u80fd\u9ad8\u6548\u3001\u987a\u7545\u5730\u5230\u8fbe\u76ee\u7684\u5730\u3002<\/p>\n<p>TCP\u62e5\u585e\u63a7\u5236\u4e0e\u6d41\u91cf\u63a7\u5236\u534f\u540c\u5de5\u4f5c&#xff08;\u5b9e\u9645\u53d1\u9001\u7a97\u53e3&#061;min(\u62e5\u585e\u7a97\u53e3, \u63a5\u6536\u7a97\u53e3)&#xff09;&#xff0c;\u6d41\u91cf\u63a7\u5236\u89e3\u51b3\u201c\u63a5\u6536\u7aef\u625b\u4e0d\u4f4f\u201d\u7684\u95ee\u9898&#xff0c;\u62e5\u585e\u63a7\u5236\u89e3\u51b3\u201c\u7f51\u7edc\u625b\u4e0d\u4f4f\u201d\u7684\u95ee\u9898&#xff0c;\u4e8c\u8005\u5171\u540c\u6784\u6210TCP\u901f\u7387\u8c03\u8282\u7684\u201c\u53cc\u91cd\u4fdd\u969c\u201d\u3002\u672c\u6587\u5c06\u4ece\u6838\u5fc3\u5b9a\u4e49\u3001\u672c\u8d28\u903b\u8f91\u3001\u6838\u5fc3\u5b9e\u73b0\u673a\u5236\u3001\u5de5\u4f5c\u6d41\u7a0b\u3001\u4e0e\u6d41\u91cf\u63a7\u5236\u7684\u533a\u522b\u3001\u5178\u578b\u573a\u666f\u3001\u95ee\u9898\u4e0e\u4f18\u5316\u4e03\u4e2a\u7ef4\u5ea6&#xff0c;\u7cfb\u7edf\u62c6\u89e3TCP\u62e5\u585e\u63a7\u5236\u7684\u5e95\u5c42\u539f\u7406&#xff0c;\u5e2e\u4f60\u5f7b\u5e95\u5403\u900f\u8fd9\u4e00\u8ba1\u7b97\u673a\u7f51\u7edc\u6838\u5fc3\u91cd\u96be\u70b9\u3002 <img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/02\/20260204141817-698355297849c.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<h3>&#x1f50d; \u4e00\u3001\u6838\u5fc3\u5b9a\u4e49\u4e0e\u672c\u8d28&#xff1a;\u7f51\u7edc\u7ea7\u901f\u7387\u9002\u914d\u7684\u6838\u5fc3\u903b\u8f91<\/h3>\n<h4>&#xff08;\u4e00&#xff09;\u6743\u5a01\u5b9a\u4e49<\/h4>\n<p>TCP\u62e5\u585e\u63a7\u5236\u662f\u6307&#xff0c;\u53d1\u9001\u7aef\u901a\u8fc7\u5b9e\u65f6\u63a2\u6d4b\u7f51\u7edc\u94fe\u8def\u7684\u62e5\u5835\u72b6\u51b5&#xff08;\u5982\u4e22\u5305\u3001\u5ef6\u8fdf\u3001\u541e\u5410\u91cf\u53d8\u5316&#xff09;&#xff0c;\u52a8\u6001\u8c03\u6574\u81ea\u8eab\u7684\u62e5\u585e\u7a97\u53e3&#xff08;cwnd&#xff09; \u5927\u5c0f&#xff0c;\u8fdb\u800c\u63a7\u5236\u53d1\u9001\u901f\u7387&#xff0c;\u4f7f\u53d1\u9001\u7aef\u7684\u53d1\u9001\u91cf\u4e0d\u8d85\u8fc7\u7f51\u7edc\u7684\u627f\u8f7d\u80fd\u529b&#xff0c;\u907f\u514d\u7f51\u7edc\u62e5\u585e\u52a0\u5267&#xff0c;\u540c\u65f6\u5c3d\u53ef\u80fd\u5145\u5206\u5229\u7528\u7f51\u7edc\u5e26\u5bbd\u7684\u7f51\u7edc\u7ea7\u63a7\u5236\u673a\u5236\u3002<\/p>\n<h4>&#xff08;\u4e8c&#xff09;\u6838\u5fc3\u672c\u8d28<\/h4>\n<p>TCP\u62e5\u585e\u63a7\u5236\u7684\u672c\u8d28\u662f\u201c\u7f51\u7edc\u7ea7\u7684\u901f\u7387\u8bd5\u63a2\u4e0e\u9002\u914d\u201d&#xff0c;\u6838\u5fc3\u903b\u8f91\u53ef\u6982\u62ec\u4e3a&#xff1a;\u201c\u8bd5\u63a2\u5e26\u5bbd\u3001\u611f\u77e5\u62e5\u5835\u3001\u52a8\u6001\u8c03\u6574\u3001\u515c\u5e95\u7a33\u5b9a\u201d\u3002\u5176\u6838\u5fc3\u524d\u63d0\u662f&#xff1a;\u7f51\u7edc\u7684\u5e26\u5bbd\u3001\u7f13\u5b58\u8d44\u6e90\u662f\u6709\u9650\u7684&#xff0c;\u8def\u7531\u5668\u3001\u4ea4\u6362\u673a\u7684\u8f6c\u53d1\u80fd\u529b\u6709\u4e0a\u9650&#xff0c;\u82e5\u591a\u4e2a\u53d1\u9001\u7aef\u540c\u65f6\u9ad8\u901f\u53d1\u9001\u6570\u636e&#xff0c;\u4f1a\u5bfc\u81f4\u6570\u636e\u5305\u5728\u4e2d\u95f4\u8bbe\u5907\u6392\u961f\u3001\u7f13\u5b58\u6ea2\u51fa&#xff0c;\u8fdb\u800c\u5f15\u53d1\u4e22\u5305\u3001\u5ef6\u8fdf\u6fc0\u589e&#xff0c;\u5f62\u6210\u201c\u62e5\u585e\u6076\u6027\u5faa\u73af\u201d&#xff08;\u4e22\u5305\u2192\u91cd\u4f20\u2192\u66f4\u62e5\u585e\u2192\u66f4\u591a\u4e22\u5305&#xff09;\u3002<\/p>\n<p>\u62e5\u585e\u63a7\u5236\u7684\u6838\u5fc3\u7279\u70b9\u662f\u201c\u7f51\u7edc\u611f\u77e5\u3001\u53d1\u9001\u7aef\u4e3b\u5bfc\u3001\u5168\u5c40\u9002\u914d\u201d&#xff1a;<\/p>\n<ul>\n<li>\u7f51\u7edc\u611f\u77e5&#xff1a;\u53d1\u9001\u7aef\u901a\u8fc7\u4e22\u5305\u3001\u5ef6\u8fdf\u7b49\u4fe1\u53f7&#xff0c;\u95f4\u63a5\u5224\u65ad\u7f51\u7edc\u62e5\u5835\u72b6\u51b5&#xff0c;\u65e0\u9700\u4e2d\u95f4\u8bbe\u5907&#xff08;\u8def\u7531\u5668&#xff09;\u4e3b\u52a8\u53cd\u9988&#xff1b;<\/li>\n<li>\u53d1\u9001\u7aef\u4e3b\u5bfc&#xff1a;\u62e5\u585e\u7a97\u53e3\u7531\u53d1\u9001\u7aef\u81ea\u4e3b\u8ba1\u7b97\u3001\u52a8\u6001\u8c03\u6574&#xff0c;\u65e0\u9700\u63a5\u6536\u7aef\u53c2\u4e0e&#xff0c;\u662f\u53d1\u9001\u7aef\u63a7\u5236\u901f\u7387\u7684\u6838\u5fc3\u4f9d\u636e&#xff1b;<\/li>\n<li>\u5168\u5c40\u9002\u914d&#xff1a;\u5173\u6ce8\u6574\u4e2a\u7f51\u7edc\u94fe\u8def\u7684\u627f\u8f7d\u80fd\u529b&#xff0c;\u800c\u975e\u5355\u4e00\u53d1\u9001\u7aef\u4e0e\u63a5\u6536\u7aef\u7684\u5339\u914d&#xff0c;\u907f\u514d\u5355\u4e2a\u8fde\u63a5\u5360\u7528\u8fc7\u591a\u7f51\u7edc\u8d44\u6e90\u3002<\/li>\n<\/ul>\n<h4>&#xff08;\u4e09&#xff09;\u6838\u5fc3\u76ee\u6807&#xff08;\u56db\u5927\u6838\u5fc3&#xff09;<\/h4>\n<li>\u907f\u514d\u7f51\u7edc\u62e5\u585e&#xff1a;\u63a7\u5236\u53d1\u9001\u901f\u7387&#xff0c;\u9632\u6b62\u6570\u636e\u5305\u5728\u4e2d\u95f4\u8bbe\u5907\u6392\u961f\u3001\u7f13\u5b58\u6ea2\u51fa&#xff0c;\u51cf\u5c11\u4e22\u5305\u548c\u5ef6\u8fdf&#xff1b;<\/li>\n<li>\u5145\u5206\u5229\u7528\u7f51\u7edc\u5e26\u5bbd&#xff1a;\u5728\u4e0d\u62e5\u5835\u7684\u524d\u63d0\u4e0b&#xff0c;\u5c3d\u53ef\u80fd\u6700\u5927\u5316\u53d1\u9001\u901f\u7387&#xff0c;\u63d0\u5347\u7f51\u7edc\u541e\u5410\u91cf&#xff0c;\u907f\u514d\u5e26\u5bbd\u6d6a\u8d39&#xff1b;<\/li>\n<li>\u4fdd\u969c\u4f20\u8f93\u7a33\u5b9a\u6027&#xff1a;\u907f\u514d\u56e0\u62e5\u585e\u5bfc\u81f4\u7684\u4e22\u5305\u3001\u91cd\u4f20\u52a0\u5267&#xff0c;\u786e\u4fddTCP\u8fde\u63a5\u7684\u4f20\u8f93\u5ef6\u8fdf\u7a33\u5b9a\u3001\u4e22\u5305\u7387\u53ef\u63a7&#xff1b;<\/li>\n<li>\u516c\u5e73\u5206\u914d\u5e26\u5bbd&#xff1a;\u591a\u4e2aTCP\u8fde\u63a5\u5171\u4eab\u7f51\u7edc\u8d44\u6e90\u65f6&#xff0c;\u901a\u8fc7\u62e5\u585e\u63a7\u5236\u673a\u5236&#xff0c;\u4f7f\u5404\u8fde\u63a5\u516c\u5e73\u5360\u7528\u5e26\u5bbd&#xff0c;\u907f\u514d\u5355\u4e2a\u8fde\u63a5\u72ec\u5360\u8d44\u6e90\u3002<\/li>\n<h4>&#xff08;\u56db&#xff09;\u6838\u5fc3\u4ef7\u503c<\/h4>\n<li>\u4fdd\u969c\u7f51\u7edc\u5168\u5c40\u7a33\u5b9a&#xff1a;\u907f\u514d\u5355\u4e2aTCP\u8fde\u63a5\u7684\u8fc7\u5ea6\u53d1\u9001&#xff0c;\u5bfc\u81f4\u6574\u4e2a\u7f51\u7edc\u94fe\u8def\u762b\u75ea&#xff0c;\u662f\u4e92\u8054\u7f51\u5927\u89c4\u6a21\u7a33\u5b9a\u8fd0\u884c\u7684\u6838\u5fc3\u4fdd\u969c&#xff1b;<\/li>\n<li>\u63d0\u5347\u4f20\u8f93\u4f53\u9a8c&#xff1a;\u51cf\u5c11\u62e5\u585e\u5bfc\u81f4\u7684\u5ef6\u8fdf\u3001\u4e22\u5305&#xff0c;\u8ba9\u6587\u4ef6\u4f20\u8f93\u3001\u5728\u7ebf\u652f\u4ed8\u3001\u89c6\u9891\u901a\u8bdd\u7b49\u573a\u666f\u7684\u4f53\u9a8c\u66f4\u6d41\u7545&#xff1b;<\/li>\n<li>\u4f18\u5316\u5e26\u5bbd\u5229\u7528\u7387&#xff1a;\u5728\u201c\u4e0d\u62e5\u5835\u201d\u548c\u201c\u9ad8\u5229\u7528\u7387\u201d\u4e4b\u95f4\u627e\u5230\u5e73\u8861&#xff0c;\u907f\u514d\u5e26\u5bbd\u6d6a\u8d39\u6216\u8fc7\u5ea6\u5360\u7528&#xff1b;<\/li>\n<li>\u652f\u6491\u591a\u8fde\u63a5\u5e76\u53d1&#xff1a;\u9002\u914d\u4e92\u8054\u7f51\u4e2d\u5927\u91cfTCP\u8fde\u63a5\u5e76\u53d1\u7684\u573a\u666f&#xff0c;\u5b9e\u73b0\u5e26\u5bbd\u7684\u516c\u5e73\u5206\u914d&#xff0c;\u4fdd\u969c\u6240\u6709\u8fde\u63a5\u7684\u6b63\u5e38\u4f20\u8f93\u3002<\/li>\n<h3>&#x1f9e9; \u4e8c\u3001TCP\u62e5\u585e\u63a7\u5236\u7684\u6838\u5fc3\u5b9e\u73b0\u673a\u5236&#xff1a;\u62e5\u585e\u7a97\u53e3\u4e3b\u5bfc\u7684\u56db\u9636\u6bb5\u903b\u8f91<\/h3>\n<p>TCP\u62e5\u585e\u63a7\u5236\u7684\u6838\u5fc3\u5b9e\u73b0\u4f9d\u8d56\u201c\u62e5\u585e\u7a97\u53e3&#xff08;cwnd&#xff09; \u201d&#xff0c;\u901a\u8fc7\u52a8\u6001\u8c03\u6574cwnd\u7684\u5927\u5c0f&#xff0c;\u63a7\u5236\u53d1\u9001\u7aef\u7684\u53d1\u9001\u901f\u7387\u3002\u7ecf\u5178TCP\u62e5\u585e\u63a7\u5236&#xff08;Reno\u7b97\u6cd5&#xff09;\u5206\u4e3a\u56db\u4e2a\u6838\u5fc3\u9636\u6bb5&#xff1a;\u6162\u542f\u52a8\u3001\u62e5\u585e\u907f\u514d\u3001\u5feb\u901f\u91cd\u4f20\u3001\u5feb\u901f\u6062\u590d&#xff0c;\u5404\u9636\u6bb5\u5faa\u5e8f\u6e10\u8fdb\u3001\u534f\u540c\u5de5\u4f5c&#xff0c;\u5b9e\u73b0\u201c\u8bd5\u63a2-\u7a33\u5b9a-\u4fee\u590d-\u518d\u7a33\u5b9a\u201d\u7684\u5b8c\u6574\u95ed\u73af\u3002<\/p>\n<h4>&#xff08;\u4e00&#xff09;\u6838\u5fc3\u8f7d\u4f53&#xff1a;\u62e5\u585e\u7a97\u53e3&#xff08;Congestion Window, cwnd&#xff09;<\/h4>\n<p>\u62e5\u585e\u7a97\u53e3\u662f\u53d1\u9001\u7aef\u6839\u636e\u7f51\u7edc\u62e5\u5835\u72b6\u51b5&#xff0c;\u81ea\u4e3b\u7ef4\u62a4\u7684\u4e00\u4e2a\u201c\u865a\u62df\u7a97\u53e3\u201d&#xff0c;\u5355\u4f4d\u4e3a\u5b57\u8282&#xff08;\u6216\u6700\u5927\u62a5\u6587\u6bb5MSS&#xff09;&#xff0c;\u8868\u793a\u53d1\u9001\u7aef\u5728\u4e0d\u5f15\u53d1\u7f51\u7edc\u62e5\u585e\u7684\u524d\u63d0\u4e0b&#xff0c;\u6700\u591a\u53ef\u8fde\u7eed\u53d1\u9001\u7684\u672a\u786e\u8ba4\u6570\u636e\u91cf\u3002<\/p>\n<h5>\u5173\u952e\u7ec6\u8282&#xff1a;<\/h5>\n<li>\u62e5\u585e\u7a97\u53e3\u4e0e\u53d1\u9001\u7a97\u53e3\u7684\u5173\u7cfb&#xff1a;\u5b9e\u9645\u53d1\u9001\u7a97\u53e3 &#061; min(\u62e5\u585e\u7a97\u53e3cwnd, \u63a5\u6536\u7a97\u53e3rwnd)&#xff0c;\u5373\u53d1\u9001\u7aef\u7684\u53d1\u9001\u901f\u7387&#xff0c;\u540c\u65f6\u53d7\u201c\u7f51\u7edc\u627f\u8f7d\u80fd\u529b\u201d&#xff08;cwnd&#xff09;\u548c\u201c\u63a5\u6536\u7aef\u5904\u7406\u80fd\u529b\u201d&#xff08;rwnd&#xff09;\u7684\u9650\u5236&#xff0c;\u53d6\u4e24\u8005\u6700\u5c0f\u503c&#xff1b;<\/li>\n<li>\u62e5\u585e\u7a97\u53e3\u7684\u52a8\u6001\u8c03\u6574&#xff1a;\u53d1\u9001\u7aef\u901a\u8fc7\u611f\u77e5\u7f51\u7edc\u62e5\u5835\u4fe1\u53f7&#xff08;\u4e22\u5305\u3001\u5ef6\u8fdf&#xff09;&#xff0c;\u52a8\u6001\u589e\u5927\u6216\u51cf\u5c0fcwnd&#xff0c;\u62e5\u5835\u65f6\u7f29\u5c0f&#xff0c;\u7a7a\u95f2\u65f6\u589e\u5927&#xff1b;<\/li>\n<li>\u521d\u59cb\u503c&#xff1a;\u8fde\u63a5\u5efa\u7acb\u521d\u671f&#xff0c;cwnd\u7684\u521d\u59cb\u503c\u8f83\u5c0f&#xff08;\u901a\u5e38\u4e3a1~2\u4e2aMSS&#xff09;&#xff0c;\u907f\u514d\u521d\u59cb\u53d1\u9001\u901f\u7387\u8fc7\u9ad8\u5bfc\u81f4\u7f51\u7edc\u62e5\u5835\u3002<\/li>\n<h4>&#xff08;\u4e8c&#xff09;\u9636\u6bb51&#xff1a;\u6162\u542f\u52a8&#xff08;Slow Start&#xff09;\u2014\u2014 \u8bd5\u63a2\u7f51\u7edc\u5e26\u5bbd\u7684\u201c\u542f\u52a8\u9636\u6bb5\u201d<\/h4>\n<p>\u6162\u542f\u52a8\u662fTCP\u8fde\u63a5\u5efa\u7acb\u540e&#xff0c;\u53d1\u9001\u7aef\u9010\u6b65\u8bd5\u63a2\u7f51\u7edc\u5e26\u5bbd\u7684\u521d\u59cb\u9636\u6bb5&#xff0c;\u6838\u5fc3\u903b\u8f91\u662f\u201c\u6307\u6570\u7ea7\u589e\u957f&#xff0c;\u5feb\u901f\u8bd5\u63a2\u7f51\u7edc\u627f\u8f7d\u4e0a\u9650\u201d\u3002<\/p>\n<h5>1. \u6838\u5fc3\u89c4\u5219<\/h5>\n<ul>\n<li>\u521d\u59cbcwnd &#061; 1~2\u4e2aMSS&#xff08;\u7531\u64cd\u4f5c\u7cfb\u7edf\u914d\u7f6e&#xff0c;\u9ed8\u8ba4\u901a\u5e38\u4e3a2 MSS&#xff09;&#xff1b;<\/li>\n<li>\u6bcf\u7ecf\u8fc7\u4e00\u4e2a\u5f80\u8fd4\u65f6\u95f4&#xff08;RTT&#xff09; &#xff0c;cwnd\u5c31\u6307\u6570\u7ea7\u589e\u957f&#xff08;\u5373cwnd &#061; cwnd \u00d7 2&#xff09;&#xff1b;<\/li>\n<li>\u7ec8\u6b62\u6761\u4ef6&#xff1a;cwnd\u589e\u957f\u5230\u201c\u6162\u542f\u52a8\u9608\u503c&#xff08;ssthresh&#xff0c;Slow Start Threshold&#xff09;\u201d\u65f6&#xff0c;\u505c\u6b62\u6307\u6570\u7ea7\u589e\u957f&#xff0c;\u8fdb\u5165\u62e5\u585e\u907f\u514d\u9636\u6bb5\u3002<\/li>\n<\/ul>\n<h5>2. \u793a\u4f8b&#xff08;\u521d\u59cbcwnd&#061;2 MSS&#xff0c;ssthresh&#061;8 MSS&#xff09;<\/h5>\n<ul>\n<li>RTT1\u7ed3\u675f&#xff1a;cwnd&#061;2\u00d72&#061;4 MSS&#xff1b;<\/li>\n<li>RTT2\u7ed3\u675f&#xff1a;cwnd&#061;4\u00d72&#061;8 MSS&#xff08;\u8fbe\u5230ssthresh&#xff09;&#xff1b;<\/li>\n<li>\u8fdb\u5165\u62e5\u585e\u907f\u514d\u9636\u6bb5&#xff0c;\u540e\u7eedcwnd\u6539\u4e3a\u7ebf\u6027\u589e\u957f\u3002<\/li>\n<\/ul>\n<h5>3. \u6838\u5fc3\u76ee\u7684<\/h5>\n<ul>\n<li>\u8fde\u63a5\u5efa\u7acb\u521d\u671f&#xff0c;\u53d1\u9001\u7aef\u4e0d\u77e5\u9053\u7f51\u7edc\u7684\u5e26\u5bbd\u4e0a\u9650&#xff0c;\u901a\u8fc7\u6307\u6570\u7ea7\u589e\u957f\u5feb\u901f\u8bd5\u63a2&#xff0c;\u907f\u514d\u521d\u59cb\u901f\u7387\u8fc7\u9ad8\u5bfc\u81f4\u62e5\u5835&#xff1b;<\/li>\n<li>\u540c\u65f6\u5feb\u901f\u5229\u7528\u7a7a\u95f2\u7f51\u7edc\u5e26\u5bbd&#xff0c;\u7f29\u77ed\u542f\u52a8\u9636\u6bb5\u7684\u4f4e\u6548\u4f20\u8f93\u65f6\u95f4\u3002<\/li>\n<\/ul>\n<h4>&#xff08;\u4e09&#xff09;\u9636\u6bb52&#xff1a;\u62e5\u585e\u907f\u514d&#xff08;Congestion Avoidance&#xff09;\u2014\u2014 \u7a33\u5b9a\u5229\u7528\u5e26\u5bbd\u7684\u201c\u5e73\u7a33\u9636\u6bb5\u201d<\/h4>\n<p>\u62e5\u585e\u907f\u514d\u9636\u6bb5\u662fTCP\u62e5\u585e\u63a7\u5236\u7684\u6838\u5fc3\u7a33\u5b9a\u9636\u6bb5&#xff0c;\u6838\u5fc3\u903b\u8f91\u662f\u201c\u7ebf\u6027\u589e\u957f&#xff0c;\u5e73\u7a33\u63d0\u5347\u901f\u7387&#xff0c;\u907f\u514d\u89e6\u53d1\u62e5\u5835\u201d\u3002<\/p>\n<h5>1. \u6838\u5fc3\u89c4\u5219<\/h5>\n<ul>\n<li>cwnd\u8fbe\u5230ssthresh\u540e&#xff0c;\u6bcf\u7ecf\u8fc7\u4e00\u4e2aRTT&#xff0c;cwnd\u7ebf\u6027\u589e\u957f&#xff08;\u5373cwnd &#061; cwnd &#043; 1 MSS&#xff09;&#xff1b;<\/li>\n<li>\u7ec8\u6b62\u6761\u4ef6&#xff1a;\u51fa\u73b0\u7f51\u7edc\u62e5\u5835\u4fe1\u53f7&#xff08;\u4e22\u5305&#xff09;&#xff0c;\u7acb\u5373\u7ec8\u6b62\u7ebf\u6027\u589e\u957f&#xff0c;\u8fdb\u5165\u5feb\u901f\u91cd\u4f20\/\u5feb\u901f\u6062\u590d\u9636\u6bb5&#xff08;\u8f7b\u5fae\u62e5\u5835&#xff09;&#xff0c;\u6216\u76f4\u63a5\u56de\u5230\u6162\u542f\u52a8\u9636\u6bb5&#xff08;\u4e25\u91cd\u62e5\u5835&#xff09;\u3002<\/li>\n<\/ul>\n<h5>2. \u793a\u4f8b&#xff08;cwnd&#061;8 MSS&#xff0c;ssthresh&#061;8 MSS&#xff09;<\/h5>\n<ul>\n<li>RTT1\u7ed3\u675f&#xff1a;cwnd&#061;8&#043;1&#061;9 MSS&#xff1b;<\/li>\n<li>RTT2\u7ed3\u675f&#xff1a;cwnd&#061;9&#043;1&#061;10 MSS&#xff1b;<\/li>\n<li>\u4ee5\u6b64\u7c7b\u63a8&#xff0c;\u6bcfRTT\u589e\u52a01 MSS&#xff0c;\u5e73\u7a33\u63d0\u5347\u901f\u7387\u3002<\/li>\n<\/ul>\n<h5>3. \u6838\u5fc3\u76ee\u7684<\/h5>\n<ul>\n<li>\u907f\u514dcwnd\u5feb\u901f\u589e\u957f\u5f15\u53d1\u7f51\u7edc\u62e5\u5835&#xff0c;\u5728\u201c\u5145\u5206\u5229\u7528\u5e26\u5bbd\u201d\u548c\u201c\u907f\u514d\u62e5\u5835\u201d\u4e4b\u95f4\u627e\u5230\u5e73\u8861&#xff1b;<\/li>\n<li>\u7ebf\u6027\u589e\u957f\u7684\u901f\u7387\u7684&#xff0c;\u65e2\u80fd\u9010\u6b65\u63d0\u5347\u541e\u5410\u91cf&#xff0c;\u53c8\u80fd\u7ed9\u7f51\u7edc\u8db3\u591f\u7684\u7f13\u51b2\u7a7a\u95f4&#xff0c;\u51cf\u5c11\u62e5\u5835\u98ce\u9669\u3002<\/li>\n<\/ul>\n<h4>&#xff08;\u56db&#xff09;\u9636\u6bb53&#xff1a;\u5feb\u901f\u91cd\u4f20&#xff08;Fast Retransmit&#xff09;\u2014\u2014 \u62e5\u5835\u4fe1\u53f7\u7684\u201c\u5feb\u901f\u54cd\u5e94\u673a\u5236\u201d<\/h4>\n<p>\u5feb\u901f\u91cd\u4f20\u662fTCP\u611f\u77e5\u201c\u8f7b\u5fae\u62e5\u5835\u201d\u7684\u6838\u5fc3\u673a\u5236&#xff0c;\u6838\u5fc3\u903b\u8f91\u662f\u201c\u65e0\u9700\u7b49\u5f85\u8d85\u65f6&#xff0c;\u901a\u8fc7\u91cd\u590dACK\u5feb\u901f\u5224\u65ad\u4e22\u5305&#xff0c;\u7acb\u5373\u91cd\u4f20&#xff0c;\u51cf\u5c11\u5ef6\u8fdf\u201d&#xff0c;\u907f\u514d\u56e0\u8d85\u65f6\u91cd\u4f20\u5bfc\u81f4\u7684\u62e5\u5835\u52a0\u5267\u3002<\/p>\n<h5>1. \u6838\u5fc3\u89e6\u53d1\u6761\u4ef6<\/h5>\n<ul>\n<li>\u53d1\u9001\u7aef\u6536\u52303\u4e2a\u8fde\u7eed\u7684\u91cd\u590dACK&#xff08;\u5373\u540c\u4e00\u786e\u8ba4\u53f7\u7684ACK\u8fde\u7eed\u51fa\u73b03\u6b21&#xff09;&#xff0c;\u5219\u5224\u5b9a\u5bf9\u5e94\u62a5\u6587\u6bb5\u4e22\u5931&#xff08;\u8f7b\u5fae\u62e5\u5835\u5bfc\u81f4\u4e22\u5305&#xff09;&#xff1b;<\/li>\n<li>\u91cd\u590dACK\u7684\u542b\u4e49&#xff1a;\u63a5\u6536\u7aef\u6536\u5230\u4e71\u5e8f\u62a5\u6587\u6bb5&#xff08;\u5982\u671f\u671bSeq&#061;5&#xff0c;\u5374\u6536\u5230Seq&#061;6&#xff09;&#xff0c;\u4f1a\u8fde\u7eed\u8fd4\u56de\u786e\u8ba4\u53f7&#061;5\u7684ACK&#xff0c;\u544a\u77e5\u53d1\u9001\u7aef\u201cSeq&#061;5\u7684\u62a5\u6587\u6bb5\u4e22\u5931&#xff0c;\u8bf7\u91cd\u4f20\u201d\u3002<\/li>\n<\/ul>\n<h5>2. \u6838\u5fc3\u64cd\u4f5c<\/h5>\n<ul>\n<li>\u7acb\u5373\u91cd\u4f20\u4e22\u5931\u7684\u62a5\u6587\u6bb5&#xff0c;\u65e0\u9700\u7b49\u5f85\u8d85\u65f6\u8ba1\u65f6\u5668&#xff08;RTO&#xff09;\u8d85\u65f6&#xff1b;<\/li>\n<li>\u91cd\u4f20\u540e&#xff0c;\u4e0d\u56de\u5230\u6162\u542f\u52a8\u9636\u6bb5&#xff0c;\u800c\u662f\u8fdb\u5165\u5feb\u901f\u6062\u590d\u9636\u6bb5&#xff0c;\u907f\u514d\u901f\u7387\u9aa4\u964d\u5bfc\u81f4\u7684\u5e26\u5bbd\u6d6a\u8d39\u3002<\/li>\n<\/ul>\n<h5>3. \u4f18\u52bf<\/h5>\n<ul>\n<li>\u5927\u5e45\u7f29\u77ed\u91cd\u4f20\u5ef6\u8fdf&#xff08;\u65e0\u9700\u7b49\u5f85RTO&#xff09;&#xff0c;\u5c24\u5176\u9002\u5408\u9ad8\u901f\u94fe\u8def&#xff08;RTT\u8f83\u5c0f&#xff0c;\u8d85\u65f6\u91cd\u4f20\u5ef6\u8fdf\u5f71\u54cd\u8f83\u5927&#xff09;&#xff1b;<\/li>\n<li>\u5feb\u901f\u4fee\u590d\u4e22\u5305\u95ee\u9898&#xff0c;\u907f\u514d\u56e0\u4e22\u5305\u5bfc\u81f4\u7684\u53d1\u9001\u7aef\u7ee7\u7eed\u9ad8\u901f\u53d1\u9001&#xff0c;\u52a0\u5267\u7f51\u7edc\u62e5\u5835\u3002<\/li>\n<\/ul>\n<h4>&#xff08;\u4e94&#xff09;\u9636\u6bb54&#xff1a;\u5feb\u901f\u6062\u590d&#xff08;Fast Recovery&#xff09;\u2014\u2014 \u8f7b\u5fae\u62e5\u5835\u540e\u7684\u201c\u901f\u7387\u6062\u590d\u673a\u5236\u201d<\/h4>\n<p>\u5feb\u901f\u6062\u590d\u662f\u5feb\u901f\u91cd\u4f20\u540e\u7684\u914d\u5957\u673a\u5236&#xff0c;\u6838\u5fc3\u903b\u8f91\u662f\u201c\u8f7b\u5fae\u62e5\u5835\u540e&#xff0c;\u5feb\u901f\u8c03\u6574cwnd\u548cssthresh&#xff0c;\u5e73\u7a33\u6062\u590d\u901f\u7387&#xff0c;\u907f\u514d\u901f\u7387\u9aa4\u964d\u201d&#xff0c;\u9002\u7528\u4e8e\u201c3\u4e2a\u91cd\u590dACK\u89e6\u53d1\u7684\u8f7b\u5fae\u4e22\u5305\u201d\u573a\u666f\u3002<\/p>\n<h5>1. \u6838\u5fc3\u64cd\u4f5c&#xff08;\u7ecf\u5178Reno\u7b97\u6cd5&#xff09;<\/h5>\n<li>\u6536\u52303\u4e2a\u8fde\u7eed\u91cd\u590dACK\u540e&#xff0c;\u5c06\u201c\u6162\u542f\u52a8\u9608\u503c&#xff08;ssthresh&#xff09;\u201d\u8c03\u6574\u4e3a\u5f53\u524dcwnd\u7684\u4e00\u534a&#xff08;ssthresh &#061; cwnd \/ 2&#xff09;&#xff0c;\u51cf\u5c11\u540e\u7eed\u901f\u7387\u589e\u957f\u7684\u4e0a\u9650&#xff0c;\u907f\u514d\u518d\u6b21\u62e5\u5835&#xff1b;<\/li>\n<li>\u5c06\u62e5\u585e\u7a97\u53e3&#xff08;cwnd&#xff09;\u8bbe\u7f6e\u4e3assthresh &#043; 3 MSS&#xff08;cwnd &#061; ssthresh &#043; 3&#xff09;&#xff0c;\u8865\u507f3\u4e2a\u91cd\u590dACK\u5bf9\u5e94\u7684\u201c\u5df2\u88ab\u63a5\u6536\u7aef\u63a5\u6536\u7684\u4e71\u5e8f\u6570\u636e\u201d&#xff0c;\u907f\u514d\u901f\u7387\u8fc7\u5ea6\u4e0b\u964d&#xff1b;<\/li>\n<li>\u4e4b\u540e\u6bcf\u6536\u5230\u4e00\u4e2a\u91cd\u590dACK&#xff0c;cwnd\u5c31\u589e\u52a01 MSS&#xff0c;\u76f4\u81f3\u6536\u5230\u6b63\u786e\u7684ACK&#xff08;\u786e\u8ba4\u4e22\u5305\u62a5\u6587\u6bb5\u5df2\u91cd\u4f20\u6210\u529f&#xff09;&#xff1b;<\/li>\n<li>\u6536\u5230\u6b63\u786eACK\u540e&#xff0c;cwnd\u6062\u590d\u4e3assthresh&#xff0c;\u91cd\u65b0\u8fdb\u5165\u62e5\u585e\u907f\u514d\u9636\u6bb5&#xff0c;\u7ebf\u6027\u589e\u957f\u901f\u7387\u3002<\/li>\n<h5>2. \u793a\u4f8b&#xff08;\u5f53\u524dcwnd&#061;10 MSS&#xff0c;ssthresh&#061;8 MSS&#xff0c;\u89e6\u53d1\u5feb\u901f\u91cd\u4f20&#xff09;<\/h5>\n<li>\u89e6\u53d1\u5feb\u901f\u91cd\u4f20\u540e&#xff0c;ssthresh &#061; 10 \/ 2 &#061; 5 MSS&#xff1b;<\/li>\n<li>cwnd &#061; 5 &#043; 3 &#061; 8 MSS&#xff1b;<\/li>\n<li>\u6bcf\u6536\u5230\u4e00\u4e2a\u91cd\u590dACK&#xff0c;cwnd\u589e\u52a01 MSS&#xff08;8\u21929\u219210\u2026&#xff09;&#xff1b;<\/li>\n<li>\u6536\u5230\u6b63\u786eACK\u540e&#xff0c;cwnd\u6062\u590d\u4e3a5 MSS&#xff0c;\u8fdb\u5165\u62e5\u585e\u907f\u514d\u9636\u6bb5&#xff0c;\u6bcfRTT\u589e\u52a01 MSS&#xff08;5\u21926\u21927\u2026&#xff09;\u3002<\/li>\n<h4>&#xff08;\u516d&#xff09;\u8865\u5145&#xff1a;\u8d85\u65f6\u91cd\u4f20\u89e6\u53d1\u7684\u201c\u4e25\u91cd\u62e5\u5835\u5904\u7406\u201d<\/h4>\n<p>\u82e5\u53d1\u9001\u7aef\u672a\u6536\u52303\u4e2a\u8fde\u7eed\u91cd\u590dACK&#xff0c;\u800c\u662f\u7b49\u5f85\u8d85\u65f6\u8ba1\u65f6\u5668&#xff08;RTO&#xff09;\u8d85\u65f6&#xff0c;\u5224\u5b9a\u4e3a\u201c\u4e25\u91cd\u62e5\u5835\u201d&#xff08;\u7f51\u7edc\u62e5\u5835\u4e25\u91cd&#xff0c;\u4e22\u5305\u8f83\u591a&#xff09;&#xff0c;\u5904\u7406\u903b\u8f91\u4e0e\u8f7b\u5fae\u62e5\u5835\u4e0d\u540c&#xff1a;<\/p>\n<li>\u5c06\u6162\u542f\u52a8\u9608\u503c&#xff08;ssthresh&#xff09;\u8c03\u6574\u4e3a\u5f53\u524dcwnd\u7684\u4e00\u534a&#xff08;ssthresh &#061; cwnd \/ 2&#xff09;&#xff1b;<\/li>\n<li>\u5c06\u62e5\u585e\u7a97\u53e3&#xff08;cwnd&#xff09;\u91cd\u7f6e\u4e3a\u521d\u59cb\u503c&#xff08;1~2 MSS&#xff09;&#xff1b;<\/li>\n<li>\u91cd\u65b0\u8fdb\u5165\u6162\u542f\u52a8\u9636\u6bb5&#xff0c;\u4ece\u5934\u5f00\u59cb\u6307\u6570\u7ea7\u8bd5\u63a2\u7f51\u7edc\u5e26\u5bbd&#xff0c;\u907f\u514d\u7ee7\u7eed\u9ad8\u901f\u53d1\u9001\u52a0\u5267\u62e5\u5835\u3002<\/li>\n<h3>&#x1f4cc; \u4e09\u3001TCP\u62e5\u585e\u63a7\u5236\u7684\u5b8c\u6574\u5de5\u4f5c\u95ed\u73af&#xff08;\u573a\u666f\u5316\u62c6\u89e3&#xff09;<\/h3>\n<p>TCP\u62e5\u585e\u63a7\u5236\u7684\u56db\u4e2a\u9636\u6bb5\u5e76\u975e\u72ec\u7acb\u5b58\u5728&#xff0c;\u800c\u662f\u5728\u4e0d\u540c\u7f51\u7edc\u573a\u666f\u4e0b\u534f\u540c\u914d\u5408&#xff0c;\u5f62\u6210\u201c\u542f\u52a8-\u5e73\u7a33-\u4fee\u590d-\u518d\u5e73\u7a33\u201d\u7684\u5b8c\u6574\u95ed\u73af\u3002\u4ee5\u4e0b\u52063\u79cd\u5178\u578b\u573a\u666f&#xff0c;\u62c6\u89e3\u5b8c\u6574\u5de5\u4f5c\u6d41\u7a0b&#xff08;\u5047\u8bbe\u521d\u59cbcwnd&#061;2 MSS&#xff0c;ssthresh&#061;8 MSS&#xff0c;MSS&#061;1000\u5b57\u8282&#xff09;\u3002<\/p>\n<h4>&#xff08;\u4e00&#xff09;\u573a\u666f1&#xff1a;\u6b63\u5e38\u573a\u666f&#xff08;\u7f51\u7edc\u7a7a\u95f2&#xff0c;\u65e0\u62e5\u5835&#xff09;<\/h4>\n<li>\u6162\u542f\u52a8\u9636\u6bb5&#xff1a;\u53d1\u9001\u7aefcwnd\u4ece2 MSS\u5f00\u59cb&#xff0c;\u6bcfRTT\u6307\u6570\u7ea7\u589e\u957f&#xff08;2\u21924\u21928 MSS&#xff09;&#xff0c;\u8fbe\u5230ssthresh&#061;8 MSS\u540e&#xff0c;\u8fdb\u5165\u62e5\u585e\u907f\u514d\u9636\u6bb5&#xff1b;<\/li>\n<li>\u62e5\u585e\u907f\u514d\u9636\u6bb5&#xff1a;cwnd\u6bcfRTT\u7ebf\u6027\u589e\u957f&#xff08;8\u21929\u219210\u219211\u2026 MSS&#xff09;&#xff0c;\u53d1\u9001\u901f\u7387\u5e73\u7a33\u63d0\u5347&#xff0c;\u5145\u5206\u5229\u7528\u7f51\u7edc\u5e26\u5bbd&#xff1b;<\/li>\n<li>\u6301\u7eed\u5faa\u73af&#xff1a;\u53ea\u8981\u7f51\u7edc\u65e0\u62e5\u5835&#xff08;\u65e0\u4e22\u5305\u3001\u65e0\u5ef6\u8fdf\u6fc0\u589e&#xff09;&#xff0c;\u5c31\u4e00\u76f4\u5904\u4e8e\u62e5\u585e\u907f\u514d\u9636\u6bb5&#xff0c;cwnd\u6301\u7eed\u7ebf\u6027\u589e\u957f&#xff0c;\u76f4\u81f3\u8fbe\u5230\u7f51\u7edc\u5e26\u5bbd\u4e0a\u9650&#xff1b;<\/li>\n<li>\u4f20\u8f93\u7ed3\u675f&#xff1a;\u6240\u6709\u6570\u636e\u53d1\u9001\u5b8c\u6bd5&#xff0c;\u63a5\u6536\u7aef\u53cd\u9988\u6700\u7ec8ACK&#xff0c;\u62e5\u585e\u63a7\u5236\u673a\u5236\u7ec8\u6b62\u3002<\/li>\n<h4>&#xff08;\u4e8c&#xff09;\u573a\u666f2&#xff1a;\u8f7b\u5fae\u62e5\u5835\u573a\u666f&#xff08;\u89e6\u53d1\u5feb\u901f\u91cd\u4f20\/\u5feb\u901f\u6062\u590d&#xff09;<\/h4>\n<li>\u6162\u542f\u52a8\u2192\u62e5\u585e\u907f\u514d&#xff1a;cwnd\u4ece2\u21924\u21928\u21929\u219210 MSS&#xff08;\u8fdb\u5165\u62e5\u585e\u907f\u514d\u9636\u6bb5&#xff0c;cwnd&#061;10 MSS&#xff09;&#xff1b;<\/li>\n<li>\u89e6\u53d1\u62e5\u5835&#xff1a;\u7f51\u7edc\u51fa\u73b0\u8f7b\u5fae\u62e5\u5835&#xff0c;Seq&#061;9001\u7684\u62a5\u6587\u6bb5\u4e22\u5931&#xff0c;\u63a5\u6536\u7aef\u6536\u5230Seq&#061;10001\u7684\u62a5\u6587\u6bb5\u540e&#xff0c;\u8fde\u7eed\u8fd4\u56de3\u4e2a\u91cd\u590dACK&#xff08;\u786e\u8ba4\u53f7&#061;9001&#xff09;&#xff1b;<\/li>\n<li>\u5feb\u901f\u91cd\u4f20&#xff1a;\u53d1\u9001\u7aef\u6536\u52303\u4e2a\u91cd\u590dACK&#xff0c;\u7acb\u5373\u91cd\u4f20Seq&#061;9001\u7684\u62a5\u6587\u6bb5&#xff0c;\u8fdb\u5165\u5feb\u901f\u6062\u590d\u9636\u6bb5&#xff1b;<\/li>\n<li>\u5feb\u901f\u6062\u590d&#xff1a;\n<ul>\n<li>ssthresh &#061; 10 \/ 2 &#061; 5 MSS&#xff1b;<\/li>\n<li>cwnd &#061; 5 &#043; 3 &#061; 8 MSS&#xff1b;<\/li>\n<li>\u6bcf\u6536\u5230\u4e00\u4e2a\u91cd\u590dACK&#xff0c;cwnd\u589e\u52a01 MSS&#xff08;8\u21929\u219210 MSS&#xff09;&#xff1b;<\/li>\n<\/ul>\n<\/li>\n<li>\u6062\u590d\u5e73\u7a33&#xff1a;\u6536\u5230\u6b63\u786eACK&#xff08;\u786e\u8ba4\u53f7&#061;11001&#xff09;&#xff0c;cwnd\u6062\u590d\u4e3a5 MSS&#xff0c;\u91cd\u65b0\u8fdb\u5165\u62e5\u585e\u907f\u514d\u9636\u6bb5&#xff0c;\u7ebf\u6027\u589e\u957f&#xff08;5\u21926\u21927\u2026&#xff09;\u3002<\/li>\n<h4>&#xff08;\u4e09&#xff09;\u573a\u666f3&#xff1a;\u4e25\u91cd\u62e5\u5835\u573a\u666f&#xff08;\u89e6\u53d1\u8d85\u65f6\u91cd\u4f20&#xff09;<\/h4>\n<li>\u6162\u542f\u52a8\u2192\u62e5\u585e\u907f\u514d&#xff1a;cwnd\u4ece2\u21924\u21928\u21929\u219210\u219211 MSS&#xff08;\u62e5\u585e\u907f\u514d\u9636\u6bb5&#xff0c;cwnd&#061;11 MSS&#xff09;&#xff1b;<\/li>\n<li>\u89e6\u53d1\u4e25\u91cd\u62e5\u5835&#xff1a;\u7f51\u7edc\u62e5\u5835\u52a0\u5267&#xff0c;\u591a\u4e2a\u62a5\u6587\u6bb5\u4e22\u5931&#xff0c;\u53d1\u9001\u7aef\u672a\u6536\u5230\u4efb\u4f55ACK&#xff0c;\u8d85\u65f6\u8ba1\u65f6\u5668&#xff08;RTO&#xff09;\u8d85\u65f6&#xff1b;<\/li>\n<li>\u8d85\u65f6\u91cd\u4f20\u5904\u7406&#xff1a;\n<ul>\n<li>ssthresh &#061; 11 \/ 2 \u2248 5 MSS&#xff08;\u5411\u4e0b\u53d6\u6574&#xff09;&#xff1b;<\/li>\n<li>cwnd\u91cd\u7f6e\u4e3a2 MSS&#xff08;\u521d\u59cb\u503c&#xff09;&#xff1b;<\/li>\n<\/ul>\n<\/li>\n<li>\u91cd\u65b0\u542f\u52a8&#xff1a;\u91cd\u65b0\u8fdb\u5165\u6162\u542f\u52a8\u9636\u6bb5&#xff0c;cwnd\u6307\u6570\u7ea7\u589e\u957f&#xff08;2\u21924\u21925 MSS&#xff0c;\u8fbe\u5230ssthresh&#061;5 MSS&#xff09;&#xff1b;<\/li>\n<li>\u518d\u6b21\u5e73\u7a33&#xff1a;\u8fdb\u5165\u62e5\u585e\u907f\u514d\u9636\u6bb5&#xff0c;cwnd\u6bcfRTT\u7ebf\u6027\u589e\u957f&#xff08;5\u21926\u21927\u2026&#xff09;&#xff0c;\u9002\u914d\u5f53\u524d\u62e5\u5835\u540e\u7684\u7f51\u7edc\u5e26\u5bbd\u3002<\/li>\n<h3>&#x1f3af; \u56db\u3001TCP\u62e5\u585e\u63a7\u5236\u4e0e\u6d41\u91cf\u63a7\u5236\u7684\u6838\u5fc3\u533a\u522b&#xff08;\u6613\u6df7\u70b9\u7ec8\u6781\u8fa8\u6790&#xff09;<\/h3>\n<p>TCP\u62e5\u585e\u63a7\u5236\u4e0e\u6d41\u91cf\u63a7\u5236&#xff0c;\u662fTCP\u534f\u8bae\u4e2d\u6700\u6613\u6df7\u6dc6\u7684\u4e24\u4e2a\u673a\u5236&#xff0c;\u4e8c\u8005\u5747\u7528\u4e8e\u8c03\u8282\u53d1\u9001\u7aef\u7684\u53d1\u9001\u901f\u7387&#xff0c;\u4f46\u6838\u5fc3\u76ee\u6807\u3001\u63a7\u5236\u89c6\u89d2\u3001\u5b9e\u73b0\u903b\u8f91\u5b8c\u5168\u4e0d\u540c&#xff0c;\u662f\u638c\u63e1TCP\u7684\u5173\u952e\u96be\u70b9\u3002\u4ee5\u4e0b\u901a\u8fc7\u8868\u683c&#043;\u901a\u4fd7\u89e3\u6790&#xff0c;\u5f7b\u5e95\u8fa8\u6790\u4e24\u8005\u5dee\u5f02\u3002<\/p>\n<h4>&#xff08;\u4e00&#xff09;\u6838\u5fc3\u533a\u522b\u5bf9\u6bd4\u8868<\/h4>\n<table>\n<tr>\u5bf9\u6bd4\u7ef4\u5ea6TCP\u62e5\u585e\u63a7\u5236TCP\u6d41\u91cf\u63a7\u5236\u6838\u5fc3\u5dee\u5f02\u903b\u8f91<\/tr>\n<tbody>\n<tr>\n<td>\u6838\u5fc3\u76ee\u6807<\/td>\n<td>\u5339\u914d\u53d1\u9001\u7aef\u4e0e\u7f51\u7edc\u7684\u627f\u8f7d\u80fd\u529b&#xff0c;\u907f\u514d\u7f51\u7edc\u62e5\u5835<\/td>\n<td>\u5339\u914d\u53d1\u9001\u7aef\u4e0e\u63a5\u6536\u7aef\u7684\u5904\u7406\u80fd\u529b&#xff0c;\u907f\u514d\u63a5\u6536\u7aef\u7f13\u51b2\u533a\u6ea2\u51fa<\/td>\n<td>\u7f51\u7edc\u7ea7\u9002\u914d vs \u7aef\u5230\u7aef\u9002\u914d<\/td>\n<\/tr>\n<tr>\n<td>\u63a7\u5236\u89c6\u89d2<\/td>\n<td>\u5168\u5c40\u89c6\u89d2&#xff08;\u5173\u6ce8\u6574\u4e2a\u7f51\u7edc\u94fe\u8def\u7684\u62e5\u5835\u72b6\u51b5&#xff09;<\/td>\n<td>\u5c40\u90e8\u89c6\u89d2&#xff08;\u4ec5\u5173\u6ce8\u53d1\u9001\u7aef\u3001\u63a5\u6536\u7aef&#xff09;<\/td>\n<td>\u611f\u77e5\u7f51\u7edc vs \u4e0d\u611f\u77e5\u7f51\u7edc<\/td>\n<\/tr>\n<tr>\n<td>\u6838\u5fc3\u4f9d\u636e<\/td>\n<td>\u62e5\u585e\u7a97\u53e3&#xff08;cwnd&#xff09;&#xff0c;\u7531\u53d1\u9001\u7aef\u81ea\u4e3b\u8ba1\u7b97<\/td>\n<td>\u63a5\u6536\u7a97\u53e3&#xff08;rwnd&#xff09;&#xff0c;\u7531\u63a5\u6536\u7aef\u53cd\u9988<\/td>\n<td>\u53d1\u9001\u7aef\u4e3b\u5bfc vs \u63a5\u6536\u7aef\u4e3b\u5bfc<\/td>\n<\/tr>\n<tr>\n<td>\u89e6\u53d1\u6761\u4ef6<\/td>\n<td>\u7f51\u7edc\u4e22\u5305\u3001\u5ef6\u8fdf\u6fc0\u589e\u3001\u541e\u5410\u91cf\u4e0b\u964d<\/td>\n<td>\u63a5\u6536\u7aef\u5904\u7406\u7f13\u6162\u3001\u7f13\u51b2\u533a\u4e0d\u8db3<\/td>\n<td>\u7f51\u7edc\u8fc7\u8f7d vs \u63a5\u6536\u7aef\u8fc7\u8f7d<\/td>\n<\/tr>\n<tr>\n<td>\u5b9e\u73b0\u673a\u5236<\/td>\n<td>\u6162\u542f\u52a8\u3001\u62e5\u585e\u907f\u514d\u3001\u5feb\u901f\u91cd\u4f20\u3001\u5feb\u901f\u6062\u590d<\/td>\n<td>\u63a5\u6536\u7a97\u53e3\u53cd\u9988\u3001\u96f6\u7a97\u53e3\u673a\u5236\u3001\u7a97\u53e3\u63a2\u6d4b<\/td>\n<td>\u591a\u9636\u6bb5\u901f\u7387\u8bd5\u63a2 vs \u7a97\u53e3\u52a8\u6001\u8c03\u8282<\/td>\n<\/tr>\n<tr>\n<td>\u534f\u540c\u5173\u7cfb<\/td>\n<td>\u4e0e\u6d41\u91cf\u63a7\u5236\u914d\u5408&#xff0c;\u5171\u540c\u51b3\u5b9a\u53d1\u9001\u7aef\u5b9e\u9645\u53d1\u9001\u901f\u7387<\/td>\n<td>\u4e0e\u62e5\u585e\u63a7\u5236\u914d\u5408&#xff0c;\u9650\u5236\u53d1\u9001\u7aef\u4e0d\u8d85\u8fc7\u63a5\u6536\u7aef\u80fd\u529b<\/td>\n<td>\u4e92\u8865\u534f\u540c&#xff0c;\u7f3a\u4e00\u4e0d\u53ef<\/td>\n<\/tr>\n<tr>\n<td>\u5178\u578b\u573a\u666f<\/td>\n<td>\u5e7f\u57df\u7f51\u3001\u79fb\u52a8\u7f51\u7edc\u3001\u9ad8\u5e76\u53d1\u94fe\u8def&#xff08;\u7f51\u7edc\u590d\u6742&#xff09;<\/td>\n<td>\u4f4e\u7b97\u529b\u7ec8\u7aef\u3001\u5e94\u7528\u5c42\u963b\u585e&#xff08;\u7ec8\u7aef\u80fd\u529b\u6709\u9650&#xff09;<\/td>\n<td>\u7f51\u7edc\u625b\u4e0d\u4f4f vs \u63a5\u6536\u7aef\u625b\u4e0d\u4f4f<\/td>\n<\/tr>\n<tr>\n<td>\u6838\u5fc3\u4fe1\u53f7<\/td>\n<td>\u4e22\u5305\u3001RTT\u6ce2\u52a8&#xff08;\u95f4\u63a5\u611f\u77e5\u7f51\u7edc\u72b6\u6001&#xff09;<\/td>\n<td>\u63a5\u6536\u7a97\u53e3\u5927\u5c0f&#xff08;\u76f4\u63a5\u63a5\u6536\u63a5\u6536\u7aef\u53cd\u9988&#xff09;<\/td>\n<td>\u95f4\u63a5\u611f\u77e5 vs \u76f4\u63a5\u53cd\u9988<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h4>&#xff08;\u4e8c&#xff09;\u901a\u4fd7\u8fa8\u6790&#xff08;\u4e00\u53e5\u8bdd\u5403\u900f&#xff09;<\/h4>\n<ul>\n<li>\u62e5\u585e\u63a7\u5236&#xff1a;\u201c\u7f51\u7edc\u592a\u5835\u4e86&#xff0c;\u6211&#xff08;\u53d1\u9001\u7aef&#xff09;\u6162\u4e00\u70b9&#xff0c;\u522b\u7ed9\u8def\u7531\u5668\u3001\u4ea4\u6362\u673a\u6dfb\u8d1f\u62c5&#xff0c;\u907f\u514d\u5927\u5bb6\u90fd\u4f20\u4e0d\u52a8\u201d&#xff1b;<\/li>\n<li>\u6d41\u91cf\u63a7\u5236&#xff1a;\u201c\u4f60&#xff08;\u63a5\u6536\u7aef&#xff09;\u5904\u7406\u592a\u6162\u4e86&#xff0c;\u6211&#xff08;\u53d1\u9001\u7aef&#xff09;\u6162\u4e00\u70b9&#xff0c;\u522b\u7ed9\u4f60\u7684\u7f13\u51b2\u533a\u53d1\u6ee1\u4e86&#xff0c;\u907f\u514d\u6570\u636e\u4e22\u5931\u201d\u3002<\/li>\n<\/ul>\n<h4>&#xff08;\u4e09&#xff09;\u534f\u540c\u793a\u4f8b&#xff08;\u5b9e\u9645\u53d1\u9001\u901f\u7387\u7684\u51b3\u5b9a\u903b\u8f91&#xff09;<\/h4>\n<p>\u5047\u8bbe\u53d1\u9001\u7aef\u5f53\u524dcwnd&#061;10 MSS&#xff08;\u7f51\u7edc\u5141\u8bb8\u7684\u6700\u5927\u901f\u7387&#xff09;&#xff0c;\u63a5\u6536\u7aef\u53cd\u9988rwnd&#061;5 MSS&#xff08;\u63a5\u6536\u7aef\u80fd\u5904\u7406\u7684\u6700\u5927\u901f\u7387&#xff09;&#xff1a;<\/p>\n<ul>\n<li>\u5b9e\u9645\u53d1\u9001\u7a97\u53e3 &#061; min(10 MSS, 5 MSS) &#061; 5 MSS&#xff1b;<\/li>\n<li>\u53d1\u9001\u7aef\u4f1a\u4ee55 MSS\u7684\u901f\u7387\u53d1\u9001\u6570\u636e&#xff0c;\u65e2\u4e0d\u8d85\u8fc7\u7f51\u7edc\u627f\u8f7d\u80fd\u529b&#xff08;\u907f\u514d\u62e5\u5835&#xff09;&#xff0c;\u4e5f\u4e0d\u8d85\u8fc7\u63a5\u6536\u7aef\u5904\u7406\u80fd\u529b&#xff08;\u907f\u514d\u6ea2\u51fa&#xff09;&#xff1b;<\/li>\n<li>\u82e5\u7f51\u7edc\u62e5\u5835&#xff0c;cwnd\u964d\u81f33 MSS&#xff0c;\u5b9e\u9645\u53d1\u9001\u7a97\u53e3\u53d8\u4e3a3 MSS&#xff1b;\u82e5\u63a5\u6536\u7aef\u5fd9\u788c&#xff0c;rwnd\u964d\u81f32 MSS&#xff0c;\u5b9e\u9645\u53d1\u9001\u7a97\u53e3\u53d8\u4e3a2 MSS\u3002<\/li>\n<\/ul>\n<h3>&#x1f4ca; \u4e94\u3001TCP\u62e5\u585e\u63a7\u5236\u7684\u5178\u578b\u5e94\u7528\u573a\u666f&#xff1a;\u9002\u914d\u590d\u6742\u7f51\u7edc\u73af\u5883<\/h3>\n<p>TCP\u62e5\u585e\u63a7\u5236\u7684\u8bbe\u8ba1&#xff0c;\u6838\u5fc3\u662f\u9002\u914d\u201c\u7f51\u7edc\u72b6\u51b5\u590d\u6742\u3001\u5e26\u5bbd\u6ce2\u52a8\u5927\u201d\u7684\u573a\u666f&#xff0c;\u901a\u8fc7\u52a8\u6001\u8c03\u6574\u901f\u7387&#xff0c;\u4fdd\u969c\u4e0d\u540c\u7f51\u7edc\u73af\u5883\u4e0b\u7684\u4f20\u8f93\u7a33\u5b9a\u6027\u3002\u4ee5\u4e0b\u662f\u5178\u578b\u5e94\u7528\u573a\u666f\u53ca\u9002\u914d\u903b\u8f91\u3002<\/p>\n<h4>&#xff08;\u4e00&#xff09;\u573a\u666f1&#xff1a;\u5e7f\u57df\u7f51\u901a\u4fe1&#xff08;\u8de8\u57ce\u3001\u8de8\u56fd\u94fe\u8def&#xff09;<\/h4>\n<ul>\n<li>\u6838\u5fc3\u9700\u6c42&#xff1a;\u5e7f\u57df\u7f51\u94fe\u8def\u957f&#xff08;RTT\u5927&#xff0c;\u5982\u8de8\u57ceRTT&#061;50~100ms&#xff09;\u3001\u5e26\u5bbd\u6709\u9650\u3001\u6613\u51fa\u73b0\u62e5\u5835&#xff0c;\u9700\u907f\u514d\u901f\u7387\u8fc7\u9ad8\u5bfc\u81f4\u4e22\u5305\u52a0\u5267&#xff1b;<\/li>\n<li>\u9002\u914d\u903b\u8f91&#xff1a;\u6162\u542f\u52a8\u9636\u6bb5\u5feb\u901f\u8bd5\u63a2\u5e26\u5bbd\u4e0a\u9650&#xff0c;\u62e5\u585e\u907f\u514d\u9636\u6bb5\u7ebf\u6027\u589e\u957f\u901f\u7387&#xff0c;\u907f\u514d\u7a81\u53d1\u6d41\u91cf\u5f15\u53d1\u62e5\u5835&#xff1b;\u5feb\u901f\u91cd\u4f20\/\u5feb\u901f\u6062\u590d\u51cf\u5c11\u91cd\u4f20\u5ef6\u8fdf&#xff0c;\u9002\u914d\u5e7f\u57df\u7f51\u7684RTT\u7279\u6027&#xff1b;<\/li>\n<li>\u5178\u578b\u5e94\u7528&#xff1a;\u8de8\u57ce\u4f01\u4e1aVPN\u901a\u4fe1\u3001\u8de8\u56fd\u6587\u4ef6\u4f20\u8f93\u3001\u8fdc\u7a0b\u670d\u52a1\u5668\u8bbf\u95ee\u3002<\/li>\n<\/ul>\n<h4>&#xff08;\u4e8c&#xff09;\u573a\u666f2&#xff1a;\u79fb\u52a8\u7f51\u7edc\u901a\u4fe1&#xff08;4G\/5G\u3001\u7269\u8054\u7f51&#xff09;<\/h4>\n<ul>\n<li>\u6838\u5fc3\u9700\u6c42&#xff1a;\u79fb\u52a8\u7f51\u7edc\u4fe1\u53f7\u4e0d\u7a33\u5b9a\u3001RTT\u6ce2\u52a8\u5927&#xff08;\u5982\u5730\u94c1\u3001\u7535\u68af\u573a\u666f&#xff09;\u3001\u8bef\u7801\u7387\u9ad8&#xff08;\u6613\u51fa\u73b0\u77ed\u6682\u4e22\u5305&#xff09;&#xff0c;\u9700\u5feb\u901f\u9002\u914d\u7f51\u7edc\u6ce2\u52a8&#xff1b;<\/li>\n<li>\u9002\u914d\u903b\u8f91&#xff1a;\u4f18\u5316\u8d85\u65f6\u8ba1\u65f6\u5668&#xff08;RTO&#xff09;&#xff0c;\u9002\u914dRTT\u6ce2\u52a8&#xff1b;\u5feb\u901f\u91cd\u4f20\/\u5feb\u901f\u6062\u590d\u673a\u5236\u5feb\u901f\u54cd\u5e94\u77ed\u6682\u4e22\u5305&#xff0c;\u907f\u514d\u901f\u7387\u9aa4\u964d&#xff1b;\u90e8\u5206\u4f18\u5316\u7b97\u6cd5&#xff08;\u5982BBR&#xff09;\u51cf\u5c11\u4e22\u5305\u5bf9\u901f\u7387\u7684\u5f71\u54cd&#xff1b;<\/li>\n<li>\u5178\u578b\u5e94\u7528&#xff1a;\u624b\u673a\u6d4f\u89c8\u7f51\u9875\u3001\u79fb\u52a8APP\u89c6\u9891\u901a\u8bdd\u3001\u7269\u8054\u7f51\u4f20\u611f\u5668\u6570\u636e\u4e0a\u4f20&#xff08;4G\/5G\u573a\u666f&#xff09;\u3002<\/li>\n<\/ul>\n<h4>&#xff08;\u4e09&#xff09;\u573a\u666f3&#xff1a;\u6570\u636e\u4e2d\u5fc3\u5185\u90e8\u901a\u4fe1&#xff08;\u670d\u52a1\u5668\u96c6\u7fa4&#xff09;<\/h4>\n<ul>\n<li>\u6838\u5fc3\u9700\u6c42&#xff1a;\u6570\u636e\u4e2d\u5fc3\u94fe\u8def\u77ed&#xff08;RTT\u5c0f&#xff0c;\u5982&lt;10ms&#xff09;\u3001\u5e26\u5bbd\u9ad8&#xff08;\u598210Gbps\u5149\u7ea4&#xff09;\u3001\u8fde\u63a5\u5bc6\u96c6&#xff0c;\u9700\u5145\u5206\u5229\u7528\u5e26\u5bbd&#xff0c;\u540c\u65f6\u907f\u514d\u96c6\u7fa4\u5185\u90e8\u62e5\u5835&#xff1b;<\/li>\n<li>\u9002\u914d\u903b\u8f91&#xff1a;\u4f18\u5316\u6162\u542f\u52a8\u9608\u503c&#xff08;ssthresh&#xff09;&#xff0c;\u7f29\u77ed\u6162\u542f\u52a8\u9636\u6bb5&#xff0c;\u5feb\u901f\u8fdb\u5165\u62e5\u585e\u907f\u514d\u9636\u6bb5&#xff1b;\u91c7\u7528\u9ad8\u6027\u80fd\u62e5\u585e\u63a7\u5236\u7b97\u6cd5&#xff08;\u5982BBR\u3001CUBIC&#xff09;&#xff0c;\u5145\u5206\u5229\u7528\u9ad8\u901f\u5e26\u5bbd&#xff1b;<\/li>\n<li>\u5178\u578b\u5e94\u7528&#xff1a;\u6570\u636e\u4e2d\u5fc3\u5185\u90e8\u670d\u52a1\u5668\u95f4\u7684\u6570\u636e\u540c\u6b65\u3001\u5206\u5e03\u5f0f\u6570\u636e\u5e93&#xff08;\u5982Hadoop&#xff09;\u7684\u8282\u70b9\u901a\u4fe1\u3002<\/li>\n<\/ul>\n<h4>&#xff08;\u56db&#xff09;\u573a\u666f4&#xff1a;\u9ad8\u5e76\u53d1\u7f51\u7edc\u573a\u666f&#xff08;\u7535\u5546\u79d2\u6740\u3001\u76f4\u64ad&#xff09;<\/h4>\n<ul>\n<li>\u6838\u5fc3\u9700\u6c42&#xff1a;\u5927\u91cfTCP\u8fde\u63a5\u5e76\u53d1&#xff08;\u5982\u79d2\u6740\u65f6\u6570\u5341\u4e07\u7528\u6237\u540c\u65f6\u8bf7\u6c42&#xff09;&#xff0c;\u9700\u516c\u5e73\u5206\u914d\u5e26\u5bbd&#xff0c;\u907f\u514d\u5355\u4e2a\u8fde\u63a5\u72ec\u5360\u8d44\u6e90&#xff0c;\u5bfc\u81f4\u6574\u4f53\u62e5\u5835&#xff1b;<\/li>\n<li>\u9002\u914d\u903b\u8f91&#xff1a;\u901a\u8fc7\u62e5\u585e\u63a7\u5236\u7684\u516c\u5e73\u6027\u673a\u5236&#xff0c;\u4f7f\u5404TCP\u8fde\u63a5\u7684cwnd\u5e73\u7a33\u589e\u957f&#xff0c;\u516c\u5e73\u5360\u7528\u5e26\u5bbd&#xff1b;\u5feb\u901f\u91cd\u4f20\/\u5feb\u901f\u6062\u590d\u673a\u5236\u5feb\u901f\u5904\u7406\u7a81\u53d1\u4e22\u5305&#xff0c;\u4fdd\u969c\u591a\u6570\u8fde\u63a5\u7684\u6b63\u5e38\u4f20\u8f93&#xff1b;<\/li>\n<li>\u5178\u578b\u5e94\u7528&#xff1a;\u7535\u5546\u5e73\u53f0\u79d2\u6740\u6d3b\u52a8\u3001\u76f4\u64ad\u5e73\u53f0\u7684\u5f39\u5e55\/\u89c6\u9891\u4f20\u8f93\u3001\u77ed\u89c6\u9891APP\u7684\u5185\u5bb9\u5206\u53d1\u3002<\/li>\n<\/ul>\n<h4>&#xff08;\u4e94&#xff09;\u573a\u666f5&#xff1a;\u4f4e\u5e26\u5bbd\u7f51\u7edc\u573a\u666f&#xff08;\u4e61\u6751\u5bbd\u5e26\u3001\u536b\u661f\u901a\u4fe1&#xff09;<\/h4>\n<ul>\n<li>\u6838\u5fc3\u9700\u6c42&#xff1a;\u5e26\u5bbd\u6709\u9650&#xff08;\u5982\u4e61\u6751\u5bbd\u5e261~10Mbps&#xff09;\u3001RTT\u5927&#xff08;\u536b\u661f\u901a\u4fe1RTT&#061;\u6570\u767e\u6beb\u79d2&#xff09;&#xff0c;\u9700\u5728\u6709\u9650\u5e26\u5bbd\u5185\u7a33\u5b9a\u4f20\u8f93&#xff0c;\u907f\u514d\u62e5\u5835&#xff1b;<\/li>\n<li>\u9002\u914d\u903b\u8f91&#xff1a;\u6162\u542f\u52a8\u9636\u6bb5\u7f13\u6162\u8bd5\u63a2\u5e26\u5bbd&#xff0c;\u907f\u514d\u7a81\u53d1\u6d41\u91cf\u5360\u6ee1\u5e26\u5bbd&#xff1b;\u62e5\u585e\u907f\u514d\u9636\u6bb5\u7ebf\u6027\u589e\u957f&#xff0c;\u5e73\u7a33\u5229\u7528\u6709\u9650\u5e26\u5bbd&#xff1b;\u4f18\u5316\u7a97\u53e3\u63a2\u6d4b\u673a\u5236&#xff0c;\u51cf\u5c11\u94fe\u8def\u5f00\u9500&#xff1b;<\/li>\n<li>\u5178\u578b\u5e94\u7528&#xff1a;\u4e61\u6751\u5bbd\u5e26\u7684\u7f51\u9875\u6d4f\u89c8\u3001\u536b\u661f\u901a\u4fe1\u7684\u6570\u636e\u4f20\u8f93&#xff08;\u5982\u504f\u8fdc\u5730\u533a\u76d1\u63a7\u6570\u636e\u4e0a\u4f20&#xff09;\u3002<\/li>\n<\/ul>\n<h3>&#x1f6a8; \u516d\u3001TCP\u62e5\u585e\u63a7\u5236\u7684\u6f5c\u5728\u95ee\u9898\u4e0e\u4f18\u5316\u65b9\u6848&#xff08;\u7ecf\u5178\u7b97\u6cd5\u5347\u7ea7&#xff09;<\/h3>\n<p>\u7ecf\u5178TCP\u62e5\u585e\u63a7\u5236\u7b97\u6cd5&#xff08;Reno\u7b97\u6cd5&#xff09;\u867d\u80fd\u6ee1\u8db3\u57fa\u7840\u573a\u666f\u9700\u6c42&#xff0c;\u4f46\u5728\u9ad8\u901f\u94fe\u8def\u3001\u79fb\u52a8\u7f51\u7edc\u3001\u9ad8\u5e76\u53d1\u7b49\u590d\u6742\u573a\u666f\u4e2d&#xff0c;\u4ecd\u5b58\u5728\u6548\u7387\u4e0d\u8db3\u3001\u516c\u5e73\u6027\u5dee\u3001RTT\u9002\u914d\u5dee\u7b49\u95ee\u9898\u3002\u884c\u4e1a\u901a\u8fc7\u4e0d\u65ad\u4f18\u5316&#xff0c;\u884d\u751f\u51fa\u591a\u79cd\u9ad8\u6027\u80fd\u62e5\u585e\u63a7\u5236\u7b97\u6cd5&#xff0c;\u4ee5\u4e0b\u662f\u6838\u5fc3\u95ee\u9898\u4e0e\u4e3b\u6d41\u4f18\u5316\u65b9\u6848\u3002<\/p>\n<h4>&#xff08;\u4e00&#xff09;\u6838\u5fc3\u6f5c\u5728\u95ee\u9898&#xff08;\u7ecf\u5178Reno\u7b97\u6cd5\u7684\u77ed\u677f&#xff09;<\/h4>\n<li>\u9ad8\u901f\u94fe\u8def\u5229\u7528\u7387\u4e0d\u8db3&#xff1a;\u7ecf\u5178\u7b97\u6cd5\u7684cwnd\u589e\u957f\u901f\u5ea6\u6162&#xff0c;\u572810Gbps\u4ee5\u4e0a\u7684\u9ad8\u901f\u94fe\u8def\u4e2d&#xff0c;\u96be\u4ee5\u5145\u5206\u5229\u7528\u5e26\u5bbd&#xff08;\u9700\u957f\u65f6\u95f4\u7ebf\u6027\u589e\u957f\u624d\u80fd\u8fbe\u5230\u5e26\u5bbd\u4e0a\u9650&#xff09;&#xff1b;<\/li>\n<li>RTT\u4e0d\u516c\u5e73\u6027&#xff1a;\u957fRTT\u8fde\u63a5&#xff08;\u5982\u8de8\u56fd\u94fe\u8def&#xff09;\u4e0e\u77edRTT\u8fde\u63a5&#xff08;\u5982\u672c\u5730\u94fe\u8def&#xff09;\u5171\u4eab\u5e26\u5bbd\u65f6&#xff0c;\u77edRTT\u8fde\u63a5\u7684cwnd\u589e\u957f\u66f4\u5feb&#xff0c;\u4f1a\u62a2\u5360\u66f4\u591a\u5e26\u5bbd&#xff0c;\u5bfc\u81f4\u957fRTT\u8fde\u63a5\u901f\u7387\u6781\u4f4e&#xff1b;<\/li>\n<li>\u79fb\u52a8\u7f51\u7edc\u9002\u914d\u5dee&#xff1a;\u79fb\u52a8\u7f51\u7edc\u7684\u4e22\u5305\u591a\u4e3a\u201c\u4fe1\u53f7\u6ce2\u52a8\u5bfc\u81f4\u7684\u8bef\u7801\u4e22\u5305\u201d&#xff0c;\u800c\u975e\u201c\u7f51\u7edc\u62e5\u5835\u4e22\u5305\u201d&#xff0c;\u7ecf\u5178\u7b97\u6cd5\u4f1a\u8bef\u5224\u4e3a\u62e5\u5835&#xff0c;\u89e6\u53d1cwnd\u9aa4\u964d&#xff0c;\u5bfc\u81f4\u901f\u7387\u5267\u70c8\u6ce2\u52a8&#xff1b;<\/li>\n<li>\u62e5\u585e\u6062\u590d\u6548\u7387\u4f4e&#xff1a;\u4e25\u91cd\u62e5\u5835\u540e&#xff0c;cwnd\u91cd\u7f6e\u4e3a\u521d\u59cb\u503c&#xff0c;\u91cd\u65b0\u6162\u542f\u52a8&#xff0c;\u6062\u590d\u901f\u7387\u7684\u65f6\u95f4\u8fc7\u957f&#xff0c;\u6d6a\u8d39\u5e26\u5bbd\u3002<\/li>\n<h4>&#xff08;\u4e8c&#xff09;\u4e3b\u6d41\u4f18\u5316\u65b9\u6848&#xff08;\u9ad8\u6027\u80fd\u62e5\u585e\u63a7\u5236\u7b97\u6cd5&#xff09;<\/h4>\n<h5>1. BBR\u7b97\u6cd5&#xff08;Bottleneck Bandwidth and RTT&#xff0c;\u8c37\u6b4c\u63d0\u51fa&#xff09;<\/h5>\n<ul>\n<li>\u6838\u5fc3\u4f18\u5316&#xff1a;\u6452\u5f03\u201c\u4e22\u5305&#061;\u62e5\u5835\u201d\u7684\u4f20\u7edf\u5224\u65ad\u903b\u8f91&#xff0c;\u901a\u8fc7\u63a2\u6d4b\u7f51\u7edc\u5e26\u5bbd\u548cRTT&#xff0c;\u52a8\u6001\u8c03\u6574cwnd&#xff0c;\u805a\u7126\u201c\u6700\u5927\u5316\u5e26\u5bbd\u5229\u7528\u7387\u3001\u6700\u5c0f\u5316\u5ef6\u8fdf\u201d&#xff1b;<\/li>\n<li>\u6838\u5fc3\u4f18\u52bf&#xff1a;\n<li>\u4e0d\u4f9d\u8d56\u4e22\u5305\u4fe1\u53f7&#xff0c;\u9002\u914d\u79fb\u52a8\u7f51\u7edc&#xff08;\u8bef\u7801\u4e22\u5305\u4e0d\u89e6\u53d1cwnd\u9aa4\u964d&#xff09;&#xff1b;<\/li>\n<li>\u5feb\u901f\u63a2\u6d4b\u5e26\u5bbd\u4e0a\u9650&#xff0c;\u5145\u5206\u5229\u7528\u9ad8\u901f\u94fe\u8def&#xff08;\u598210Gbps\u5149\u7ea4&#xff09;&#xff1b;<\/li>\n<li>\u517c\u987e\u5ef6\u8fdf\u4e0e\u541e\u5410\u91cf&#xff0c;\u9002\u5408\u89c6\u9891\u901a\u8bdd\u3001\u5927\u6587\u4ef6\u4f20\u8f93\u7b49\u573a\u666f&#xff1b;<\/li>\n<\/li>\n<li>\u5e94\u7528&#xff1a;\u8c37\u6b4c\u670d\u52a1\u5668\u3001\u963f\u91cc\u4e91\u3001\u817e\u8baf\u4e91\u7b49\u4e3b\u6d41\u4e91\u5382\u5546\u9ed8\u8ba4\u91c7\u7528&#xff0c;\u6210\u4e3a\u73b0\u4ee3TCP\u7684\u9996\u9009\u7b97\u6cd5\u3002<\/li>\n<\/ul>\n<h5>2. CUBIC\u7b97\u6cd5&#xff08;Linux\u9ed8\u8ba4\u7b97\u6cd5&#xff09;<\/h5>\n<ul>\n<li>\u6838\u5fc3\u4f18\u5316&#xff1a;\u57fa\u4e8eReno\u7b97\u6cd5\u5347\u7ea7&#xff0c;\u91c7\u7528\u201c\u4e09\u6b21\u51fd\u6570\u589e\u957f\u6a21\u578b\u201d&#xff0c;\u66ff\u4ee3\u7ecf\u5178\u7684\u7ebf\u6027\u589e\u957f&#xff0c;cwnd\u589e\u957f\u901f\u5ea6\u968f\u65f6\u95f4\u52a0\u5feb&#xff0c;\u65e2\u80fd\u5feb\u901f\u6062\u590d\u901f\u7387&#xff0c;\u53c8\u80fd\u907f\u514d\u62e5\u5835&#xff1b;<\/li>\n<li>\u6838\u5fc3\u4f18\u52bf&#xff1a;\n<li>\u62e5\u585e\u6062\u590d\u901f\u5ea6\u5feb&#xff0c;\u4e25\u91cd\u62e5\u5835\u540e\u80fd\u5feb\u901f\u63d0\u5347cwnd&#xff0c;\u51cf\u5c11\u5e26\u5bbd\u6d6a\u8d39&#xff1b;<\/li>\n<li>\u517c\u987e\u516c\u5e73\u6027&#xff0c;\u957fRTT\u4e0e\u77edRTT\u8fde\u63a5\u7684\u5e26\u5bbd\u5206\u914d\u66f4\u5747\u8861&#xff1b;<\/li>\n<li>\u9002\u914d\u9ad8\u901f\u94fe\u8def&#xff0c;\u652f\u6301\u5927\u7a97\u53e3&#xff0c;\u5229\u7528\u7387\u9ad8\u4e8e\u7ecf\u5178Reno\u7b97\u6cd5&#xff1b;<\/li>\n<\/li>\n<li>\u5e94\u7528&#xff1a;Linux\u64cd\u4f5c\u7cfb\u7edf\u9ed8\u8ba4TCP\u62e5\u585e\u63a7\u5236\u7b97\u6cd5&#xff0c;\u5e7f\u6cdb\u7528\u4e8e\u670d\u52a1\u5668\u3001PC\u7aef\u3002<\/li>\n<\/ul>\n<h5>3. SACK\u914d\u5408\u4f18\u5316&#xff08;\u9009\u62e9\u6027\u786e\u8ba4&#xff09;<\/h5>\n<ul>\n<li>\u6838\u5fc3\u4f18\u5316&#xff1a;\u7ed3\u5408TCP\u7684SACK&#xff08;\u9009\u62e9\u6027\u786e\u8ba4&#xff09;\u53ef\u9009\u5b57\u6bb5&#xff0c;\u63a5\u6536\u7aef\u544a\u77e5\u53d1\u9001\u7aef\u201c\u5df2\u63a5\u6536\u7684\u4e71\u5e8f\u6570\u636e\u5757\u8303\u56f4\u201d&#xff0c;\u53d1\u9001\u7aef\u4ec5\u91cd\u4f20\u4e22\u5931\u7684\u62a5\u6587\u6bb5&#xff0c;\u65e0\u9700\u91cd\u4f20\u540e\u7eed\u6b63\u786e\u62a5\u6587\u6bb5&#xff1b;<\/li>\n<li>\u6838\u5fc3\u4f18\u52bf&#xff1a;\u51cf\u5c11\u91cd\u4f20\u5197\u4f59&#xff0c;\u5c24\u5176\u5728\u9ad8\u8bef\u7801\u7387\u94fe\u8def&#xff08;\u5982\u79fb\u52a8\u7f51\u7edc&#xff09;\u4e2d&#xff0c;\u5927\u5e45\u63d0\u5347\u62e5\u585e\u6062\u590d\u6548\u7387&#xff0c;\u914d\u5408Reno\/BBR\u7b97\u6cd5\u4f7f\u7528&#xff1b;<\/li>\n<li>\u5e94\u7528&#xff1a;\u73b0\u4ee3TCP\u534f\u8bae\u5747\u9ed8\u8ba4\u652f\u6301&#xff0c;\u662f\u62e5\u585e\u63a7\u5236\u7684\u57fa\u7840\u4f18\u5316\u65b9\u6848\u3002<\/li>\n<\/ul>\n<h5>4. \u7a97\u53e3\u6269\u5927\u56e0\u5b50&#xff08;Window Scale&#xff09;<\/h5>\n<ul>\n<li>\u6838\u5fc3\u4f18\u5316&#xff1a;\u901a\u8fc7TCP\u9996\u90e8\u53ef\u9009\u5b57\u6bb5&#xff0c;\u6269\u5c55cwnd\u7684\u6700\u5927\u53d6\u503c\u8303\u56f4&#xff08;\u7a81\u783465535\u5b57\u8282\u9650\u5236&#xff09;&#xff0c;\u652f\u6301\u6700\u5927\u7a97\u53e3\u8fbe1GB&#xff0c;\u9002\u914d\u9ad8\u901f\u957f\u8ddd\u79bb\u94fe\u8def&#xff1b;<\/li>\n<li>\u6838\u5fc3\u4f18\u52bf&#xff1a;\u8ba9\u53d1\u9001\u7aef\u80fd\u8bbe\u7f6e\u66f4\u5927\u7684cwnd&#xff0c;\u5145\u5206\u5229\u7528\u9ad8\u901f\u5e26\u5bbd&#xff08;\u598210Gbps\u5149\u7ea4&#xff09;&#xff0c;\u907f\u514d\u7a97\u53e3\u8fc7\u5c0f\u5bfc\u81f4\u7684\u5229\u7528\u7387\u4e0d\u8db3&#xff1b;<\/li>\n<li>\u5e94\u7528&#xff1a;\u6570\u636e\u4e2d\u5fc3\u3001\u5149\u7ea4\u5e7f\u57df\u7f51\u7b49\u9ad8\u901f\u573a\u666f&#xff0c;\u4e0eBBR\/CUBIC\u7b97\u6cd5\u534f\u540c\u4f7f\u7528\u3002<\/li>\n<\/ul>\n<h5>5. \u6162\u542f\u52a8\u9608\u503c\u4f18\u5316&#xff08;ssthresh\u52a8\u6001\u8c03\u6574&#xff09;<\/h5>\n<ul>\n<li>\u6838\u5fc3\u4f18\u5316&#xff1a;\u52a8\u6001\u8c03\u6574ssthresh\u7684\u521d\u59cb\u503c\u548c\u8c03\u6574\u903b\u8f91&#xff0c;\u6839\u636e\u7f51\u7edcRTT\u3001\u5e26\u5bbd\u6ce2\u52a8&#xff0c;\u81ea\u9002\u5e94\u8bbe\u7f6essthresh&#xff0c;\u7f29\u77ed\u6162\u542f\u52a8\u9636\u6bb5&#xff0c;\u5feb\u901f\u8fdb\u5165\u62e5\u585e\u907f\u514d\u9636\u6bb5&#xff1b;<\/li>\n<li>\u6838\u5fc3\u4f18\u52bf&#xff1a;\u51cf\u5c11\u542f\u52a8\u9636\u6bb5\u7684\u4f4e\u6548\u4f20\u8f93\u65f6\u95f4&#xff0c;\u63d0\u5347\u9ad8\u901f\u94fe\u8def\u7684\u521d\u59cb\u5229\u7528\u7387&#xff0c;\u9002\u914d\u4e0d\u540c\u7f51\u7edc\u573a\u666f\u7684\u6ce2\u52a8\u3002<\/li>\n<\/ul>\n<h3>&#x1f4cb; 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