{"id":5657,"date":"2022-11-12T18:55:51","date_gmt":"2022-11-12T10:55:51","guid":{"rendered":"https:\/\/www.chenqing.work\/?p=5657"},"modified":"2022-12-23T13:24:06","modified_gmt":"2022-12-23T05:24:06","slug":"web-%e6%80%a7%e8%83%bd%e4%bc%98%e5%8c%96%ef%bc%9atcp","status":"publish","type":"post","link":"https:\/\/www.chenqing.work\/?p=5657","title":{"rendered":"Web \u6027\u80fd\u4f18\u5316\uff0cPart 1\uff1aTCP"},"content":{"rendered":"\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1920\" height=\"1281\" src=\"https:\/\/www.chenqing.work\/wp-content\/uploads\/2022\/11\/awf-al-shehhi-xkPQIK4-PMk-unsplash.jpg\" alt=\"\" class=\"wp-image-5778\"\/><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\ud83e\udd10 <strong>Web \u6027\u80fd\u4f18\u5316\uff0cPart 1\uff1aTCP<\/strong><\/li>\n\n\n\n<li><a href=\"https:\/\/www.chenqing.work\/?p=5891\" data-type=\"URL\" data-id=\"https:\/\/www.chenqing.work\/?p=5891\">Web \u6027\u80fd\u4f18\u5316\uff0cPart 2\uff1aTLS<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/www.chenqing.work\/?p=5397\" data-type=\"URL\" data-id=\"https:\/\/www.chenqing.work\/?p=5397\">Web \u6027\u80fd\u4f18\u5316\uff0cPart 3\uff1aHTTP<\/a><\/li>\n<\/ul>\n\n\n\n<p>\u73b0\u4ee3\u7f51\u7edc\u534f\u8bae\u6808\u4e2d\u6700\u9760\u8fd1\u5e94\u7528\u4fa7\u7684\uff0c\u9664\u4e86\u5e94\u7528\u5c42\u534f\u8bae\uff0c\u5c31\u6570\u4f20\u8f93\u5c42\u534f\u8bae\u4e86\u3002\u4f20\u8f93\u5c42\u6709\u4e24\u5927\u534f\u8bae\uff1a<a href=\"https:\/\/www.rfc-editor.org\/rfc\/rfc9293.html\" data-type=\"URL\" data-id=\"https:\/\/www.rfc-editor.org\/rfc\/rfc9293.html\">TCP<\/a>\u3001<a href=\"https:\/\/www.rfc-editor.org\/rfc\/rfc768\" data-type=\"URL\" data-id=\"https:\/\/www.rfc-editor.org\/rfc\/rfc768\">UDP<\/a>\u3002\u4e24\u4e2a\u534f\u8bae\u6700\u5927\u7684\u533a\u522b\u662f\uff1atcp \u63d0\u4f9b\u53ef\u9760\u4f20\u8f93\uff0cudp 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has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u5982\u4f55\u4f18\u5316\u5462 \uff1f<\/h2>\n\n\n\n<p><strong>\u4e09\u6b21\u63e1\u624b<\/strong><\/p>\n\n\n\n<p>\u6bcf\u4e2a tcp \u4f20\u8f93\u90fd\u59cb\u4e8e\u4e09\u6b21\u63e1\u624b\uff0c\u6b63\u5e38\u60c5\u51b5\u4e0b\uff0c\u9700\u8981\u7b49\u5230\u63e1\u624b\u5b8c\u6210\u540e\u624d\u80fd\u5f00\u59cb\u4f20\u8f93\u6570\u636e\u3002\u5ba2\u6237\u7aef\u53ef\u4ee5\u5728\u53d1\u9001\u5b8c ack \u540e\u7acb\u5373\u53d1\u9001\u6570\u636e\u5305\uff0c\u4f46\u670d\u52a1\u7aef\u5fc5\u987b\u8981\u7b49\u63a5\u6536\u5230\u8fd9\u4e2a ack \u540e\uff0c\u624d\u80fd\u5f00\u59cb\u53d1\u9001\u6570\u636e\uff0c\u5982\u6b64\u4e00\u6765\uff0c\u6570\u636e\u4f20\u8f93\u5c31\u589e\u52a0\u4e86\u4e00\u4e2a\u7f51\u7edc\u5f80\u8fd4\u65f6\u95f4\u7684\u5ef6\u8fdf\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"759\" height=\"434\" src=\"https:\/\/www.chenqing.work\/wp-content\/uploads\/2022\/11\/image-2.png\" alt=\"\" class=\"wp-image-5799\"\/><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p>\u5982\u679c\u6211\u4eec\u8fdb\u884c\u7684\u662f\u5927\u6587\u4ef6\u4f20\u8f93\uff0c\u6216\u8005\u591a\u4e2a\u8bf7\u6c42\u5171\u4eab\u4e00\u4e2a\u957f\u8fde\u63a5\uff0c\u81ea\u7136\u53ef\u4ee5\u901a\u8fc7\u62c9\u957f\u65f6\u95f4\u6765\u5206\u644a\u6210\u672c\uff0c\u4f46\u5728\u5927\u91cf\u77ed\u8fde\u63a5\u7684\u573a\u666f\uff0c\u5219\u4ee3\u4ef7\u5c31\u663e\u5f97\u5f88\u5927\u4e86\u3002<\/p>\n\n\n\n<p>\u9488\u5bf9\u8fd9\u4e2a\u95ee\u9898\uff0c\u63d0\u51fa\u4e86 TCP \u5feb\u901f\u6253\u5f00\uff08<a href=\"https:\/\/www.rfc-editor.org\/rfc\/rfc7413\">TFO<\/a>\uff0cTCP Fast Open\uff09\uff1a\u5141\u8bb8\u5728\u63e1\u624b\u7684 SYN 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data-type=\"URL\" data-id=\"https:\/\/www.rfc-editor.org\/rfc\/rfc7323\">TCP \u7a97\u53e3\u7f29\u653e<\/a>\uff0c\u63a5\u6536\u7a97\u53e3\u5927\u5c0f\u5df2\u7ecf\u53ef\u4ee5\u8bbe\u7f6e\u5230 1G\u3002<\/p>\n\n\n\n<p><strong>\u62e5\u585e\u7a97\u53e3<\/strong>\uff08cwnd\uff09<\/p>\n\n\n\n<p>\u5728 tcp \u8fde\u63a5\u5efa\u7acb\u4e4b\u521d\uff0c\u4e0d\u7528\u4e00\u5305\u4e00 ack\uff0c\u53ef\u4ee5\u4e00\u53e3\u6c14\u5411\u7f51\u7edc\u4e0a\u53d1\u9001\u591a\u5c11\u6570\u636e\u5462\uff1f\u8fd9\u4e2a\u95ee\u9898\u7531\u6162\u542f\u52a8\u7b97\u6cd5\u8d1f\u8d23\u3002<\/p>\n\n\n\n<p>\u6839\u636e <a href=\"https:\/\/www.rfc-editor.org\/rfc\/rfc5681#page-4\" data-type=\"URL\" data-id=\"https:\/\/www.rfc-editor.org\/rfc\/rfc5681#page-4\">\u6162\u542f\u52a8\u7b97\u6cd5<\/a>\uff08slow start\uff09\uff0c\u6709\u4e00\u4e2a\u9884\u8bbe\u7684\u4fdd\u5b88\u503c \u2014 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