{"id":957,"date":"2026-07-05T07:16:15","date_gmt":"2026-07-05T07:16:15","guid":{"rendered":"https:\/\/hyc.eshachem.com\/program\/?p=957"},"modified":"2026-07-05T07:18:06","modified_gmt":"2026-07-05T07:18:06","slug":"tcp-keep-alive","status":"publish","type":"post","link":"https:\/\/hyc.eshachem.com\/program\/tcp-keep-alive\/","title":{"rendered":"TCP &amp; Keep-Alive"},"content":{"rendered":"\n<h1 class=\"wp-block-heading\" id=\"tcp-%e4%b8%89%e5%90%91%e4%ba%a4%e6%8f%a1\">TCP \u4e09\u5411\u4ea4\u63e1<\/h1>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\"><strong>TCP \u9023\u7dda<\/strong>\uff08Transmission Control Protocol\uff0c\u50b3\u8f38\u63a7\u5236\u5354\u5b9a\uff09<\/p>\n<\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"%e5%bb%ba%e7%ab%8b-tcp-%e9%80%a3%e7%b7%9a\">\u5efa\u7acb TCP \u9023\u7dda<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">TCP \u7684\u7279\u6027\u662f\uff1a<strong>\u5728\u50b3\u9001\u4efb\u4f55\u8cc7\u6599\u4e4b\u524d\uff0c\u96d9\u65b9\u5fc5\u9808\u5148\u78ba\u8a8d\u5f7c\u6b64\u90fd\u9023\u4e0a\u7dda\u4e86<\/strong>\u3002\u9019\u500b\u78ba\u8a8d\u7684\u904e\u7a0b\u5c31\u53eb\u505a <strong>\u300c\u4e09\u5411\u4ea4\u63e1\u300d\uff08Three-Way Handshake\uff09<\/strong>\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Next.js \u4f3a\u670d\u5668\u8981\u8ddf MySQL \u8cc7\u6599\u5eab\u9023\u7dda\u7684\u904e\u7a0b\u5c31\u6703\u5982\u4e0b\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u7b2c\u4e00\u6b65\uff08SYN\uff09\uff1a<\/strong> \u4f3a\u670d\u5668\u50b3\u8a0a\u606f\u7d66\u8cc7\u6599\u5eab\uff1a\u300c\u55e8\uff0c\u6211\u662f\u4f3a\u670d\u5668\uff0c\u6211\u60f3\u5efa\u7acb\u9023\u7dda\uff0c\u4f60\u807d\u5f97\u5230\u6211\u8aaa\u8a71\u55ce\uff1f\u300d<\/li>\n\n\n\n<li><strong>\u7b2c\u4e8c\u6b65\uff08SYN-ACK\uff09\uff1a<\/strong> \u8cc7\u6599\u5eab\u6536\u5230\u5f8c\u56de\u50b3\uff1a\u300c\u807d\u5f97\u5230\uff01\u6211\u9019\u908a\u6e96\u5099\u597d\u4e86\u3002\u90a3\u4f60\u807d\u5f97\u5230\u6211\u8aaa\u8a71\u55ce\uff1f\u300d<\/li>\n\n\n\n<li><strong>\u7b2c\u4e09\u6b65\uff08ACK\uff09\uff1a<\/strong> \u4f3a\u670d\u5668\u518d\u6b21\u78ba\u8a8d\uff1a\u300c\u807d\u5230\u4e86\uff01\u90a3\u6211\u5011\u6b63\u5f0f\u958b\u59cb\u9023\u7dda\u5427\uff01\u300d<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">\u7d93\u904e\u9019\u4e09\u6b21\u4e00\u4f86\u4e00\u56de\u7684\u300c\u4ea4\u63e1\u300d\uff0c\u4e00\u689d\u5b89\u5168\u7684 TCP \u9023\u7dda\u901a\u9053\u5c31\u6b63\u5f0f\u958b\u901a\u4e86\uff0c\u63a5\u4e0b\u4f86\u96d9\u65b9\u624d\u80fd\u958b\u59cb\u50b3\u9001 SQL \u8a9e\u6cd5\u548c\u8cc7\u6599\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\">\n\n\n\n<h2 class=\"wp-block-heading\" id=\"%e9%97%9c%e9%96%89-tcp-%e9%80%a3%e7%b7%9a%ef%bc%88%e5%9b%9b%e6%ac%a1%e6%8f%ae%e6%89%8b%ef%bc%89\">\u95dc\u9589 TCP \u9023\u7dda\uff08\u56db\u6b21\u63ee\u624b\uff09<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u7576\u8cc7\u6599\u50b3\u5b8c\u3001\u4e8b\u60c5\u8fa6\u5b8c\u4e86\uff0c\u5fc5\u9808\u628a\u901a\u9053\u95dc\u9589\uff0c\u91cb\u653e\u8a18\u61b6\u9ad4\u3002\u9019\u500b\u904e\u7a0b\u53eb <strong>\u300c\u56db\u6b21\u63ee\u624b\u300d\uff08Four-Way Handshake\uff09<\/strong>\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u4f3a\u670d\u5668\uff1a<\/strong>\u300c\u6211\u7684\u8cc7\u6599\u50b3\u5b8c\u4e86\uff0c\u6211\u60f3\u95dc\u9589\u9023\u7dda\u56c9\u3002\u300d<\/li>\n\n\n\n<li><strong>\u8cc7\u6599\u5eab\uff1a<\/strong>\u300c\u6536\u5230\uff0c\u6211\u77e5\u9053\u4f60\u60f3\u95dc\u9589\u4e86\u3002\u4f46\u6211\u624b\u908a\u9084\u6709\u6700\u5f8c\u4e00\u5169\u7b46\u8cc7\u6599\u8981\u8655\u7406\uff0c\u4f60\u7b49\u6211\u4e00\u4e0b\u3002\u300d<\/li>\n\n\n\n<li><strong>\u8cc7\u6599\u5eab\uff08\u8655\u7406\u5b8c\u5f8c\uff09\uff1a<\/strong>\u300c\u597d\u4e86\uff0c\u6211\u9019\u908a\u4e5f\u641e\u5b9a\u4e86\uff0c\u53ef\u4ee5\u6b63\u5f0f\u95dc\u9589\u4e86\u3002\u300d<\/li>\n\n\n\n<li><strong>\u4f3a\u670d\u5668\uff1a<\/strong>\u300c\u6536\u5230\uff0c\u90a3\u518d\u898b\uff01\u300d\uff08\u6b63\u5f0f\u4e2d\u65b7\u9023\u7dda\uff09<\/li>\n<\/ol>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\">\n\n\n\n<h2 class=\"wp-block-heading\" id=\"%e9%a0%bb%e7%b9%81%e9%96%8b%e9%97%9c-tcp-%e9%80%a3%e7%b7%9a\">\u983b\u7e41\u958b\u95dc TCP \u9023\u7dda<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u5f88\u50b7\u6548\u80fd\uff01<br>\u56e0\u7232\u524d\u7aef\u6bcf\u767c\u9001\u4e00\u500b\u8acb\u6c42\uff0c\u4f3a\u670d\u5668\u5c31\u8981\u8ddf\u8cc7\u6599\u5eab\u7d93\u6b77\u300c\u4e09\u5411\u4ea4\u63e1\uff08\u958b\uff09\u300d\u5230\u300c\u50b3\u8cc7\u6599\u300d\u518d\u5230\u300c\u56db\u6b21\u63ee\u624b\uff08\u95dc\uff09\u300d\u3002<br>\u5149\u662f\u70ba\u4e86\u8b1b\u4e00\u53e5\u8a71\uff0c\u80cc\u5f8c\u5c31\u8981\u8b1b 7 \u53e5\u5ee2\u8a71\uff08\u958b\u95dc\u7684\u5c01\u5305\u5f80\u8fd4\uff09\u3002\u9019\u6703\u5c0e\u81f4\u7db2\u9801\u56de\u61c9\u8b8a\u5f97\u5f88\u6162\u3002<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">\u6240\u4ee5\u5728\u8207\u8cc7\u6599\u5eab\u9023\u7dda\u7684\u6642\u5019\u624d\u6703\u5efa\u7acb\u9023\u7dda\u6c60\uff01<\/p>\n<\/blockquote>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\">\n\n\n\n<h1 class=\"wp-block-heading\" id=\"tcp-keep-alive\">TCP Keep-Alive<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">\u9023\u7dda\u5efa\u7acb\u597d\u4e4b\u5f8c\uff0c\u554f\u984c\u4f86\u4e86\uff1a<strong>\u5982\u679c\u7a81\u7136\u6709\u4e00\u6bb5\u6642\u9593\uff0c\u4f3a\u670d\u5668\u8ddf\u8cc7\u6599\u5eab\u4e4b\u9593\u300c\u5b8c\u5168\u6c92\u6709\u4eba\u8981\u50b3\u8cc7\u6599\u300d\uff0c\u9019\u689d\u9023\u7dda\u6703\u767c\u751f\u4ec0\u9ebc\u4e8b\uff1f<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728\u7db2\u8def\u4e16\u754c\u4e2d\uff0c\u5982\u679c\u4e00\u689d TCP \u9023\u7dda\u9577\u6642\u671f\u6c92\u6709\u8cc7\u6599\u6d41\u52d5\uff0c\u5b83\u5f88\u6709\u53ef\u80fd\u6703\u88ab\u6cbf\u9014\u7684\u8def\u7531\u5668\u6216\u9632\u706b\u7246\uff08Firewall\uff09\u8a8d\u70ba\u9019\u689d\u9023\u7dda\u5df2\u7d93\u5831\u5ee2\u4e86\uff0c\u9032\u800c\u9ed8\u9ed8\u5730\u5f9e\u8def\u7531\u8868\u4e2d\u65b7\u958b\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u9019\u6642\u5019 <strong>TCP Keep-Alive\uff08\u4fdd\u6301\u5b58\u6d3b\uff09<\/strong> \u6a5f\u5236\u5c31\u6d3e\u4e0a\u7528\u5834\u4e86\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"%e6%88%91%e9%82%84%e6%b4%bb%e7%9d%80%ef%bc%81\">\u6211\u9084\u6d3b\u7740\uff01<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">TCP Keep-Alive \u5c31\u50cf\u662f\u4e00\u500b<strong>\u96b1\u5f62\u7684\u5fc3\u8df3\u63a2\u6e2c\u5668<\/strong>\u3002\u7576\u9023\u7dda\u9032\u5165\u9592\u7f6e\uff08Idle\uff09\u72c0\u614b\uff0c\u4e14\u8d85\u904e\u8a2d\u5b9a\u7684\u6642\u9593\u5f8c\uff0c\u4f5c\u696d\u7cfb\u7d71\u6703\u81ea\u52d5\u5e6b\u4f60\u767c\u9001\u4e00\u500b\u6975\u5c0f\u7684\u63a2\u6e2c\u5c01\u5305\uff08Probe\uff09\u7d66\u5c0d\u65b9\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u4f3a\u670d\u5668\u767c\u9001\uff1a<\/strong>\u300c\uff08\u6233\u4e00\u4e0b\u8cc7\u6599\u5eab\uff09\u54c8\u56c9\uff0c\u4f60\u9084\u5728\u55ce\uff1f\u300d<\/li>\n\n\n\n<li><strong>\u8cc7\u6599\u5eab\u56de\u61c9\uff1a<\/strong>\u300c\u5728\u5566\uff0c\u9084\u6d3b\u7740\u3002\u300d<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u5982\u679c\u8cc7\u6599\u5eab\u6709\u56de\u61c9\uff0c\u9019\u689d TCP 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\u5f88\u50b7\u6548\u80fd\uff01\u56e0\u7232\u524d\u7aef\u6bcf\u767c\u9001\u4e00\u500b\u8acb\u6c42\uff0c\u4f3a\u670d\u5668\u5c31\u8981\u8ddf\u8cc7\u6599\u5eab\u7d93\u6b77\u300c\u4e09\u5411\u4ea4\u63e1\uff08\u958b\uff09\u300d\u5230\u300c\u50b3\u8cc7\u6599\u300d\u518d\u5230\u300c\u56db\u6b21\u63ee\u624b\uff08\u95dc\uff09\u300d\u3002\u5149\u662f\u70ba\u4e86\u8b1b\u4e00\u53e5\u8a71\uff0c\u80cc\u5f8c\u5c31\u8981\u8b1b 7 \u53e5\u5ee2\u8a71\uff08\u958b\u95dc\u7684\u5c01\u5305\u5f80\u8fd4\uff09\u3002\u9019\u6703\u5c0e\u81f4\u7db2\u9801\u56de\u61c9\u8b8a\u5f97\u5f88\u6162\u3002 \u6240\u4ee5\u5728\u8207\u8cc7\u6599\u5eab\u9023\u7dda\u7684\u6642\u5019\u624d\u6703\u5efa\u7acb\u9023\u7dda\u6c60\uff01 TCP Keep-Alive \u9023\u7dda\u5efa\u7acb\u597d\u4e4b\u5f8c\uff0c\u554f\u984c\u4f86\u4e86\uff1a\u5982\u679c\u7a81\u7136\u6709\u4e00\u6bb5\u6642\u9593\uff0c\u4f3a\u670d\u5668\u8ddf\u8cc7\u6599\u5eab\u4e4b\u9593\u300c\u5b8c\u5168\u6c92\u6709\u4eba\u8981\u50b3\u8cc7\u6599\u300d\uff0c\u9019\u689d\u9023\u7dda\u6703\u767c\u751f\u4ec0\u9ebc\u4e8b\uff1f \u5728\u7db2\u8def\u4e16\u754c\u4e2d\uff0c\u5982\u679c\u4e00\u689d TCP \u9023\u7dda\u9577\u6642\u671f\u6c92\u6709\u8cc7\u6599\u6d41\u52d5\uff0c\u5b83\u5f88\u6709\u53ef\u80fd\u6703\u88ab\u6cbf\u9014\u7684\u8def\u7531\u5668\u6216\u9632\u706b\u7246\uff08Firewall\uff09\u8a8d\u70ba\u9019\u689d\u9023\u7dda\u5df2\u7d93\u5831\u5ee2\u4e86\uff0c\u9032\u800c\u9ed8\u9ed8\u5730\u5f9e\u8def\u7531\u8868\u4e2d\u65b7\u958b\u3002 \u9019\u6642\u5019 TCP Keep-Alive\uff08\u4fdd\u6301\u5b58\u6d3b\uff09 \u6a5f\u5236\u5c31\u6d3e\u4e0a\u7528\u5834\u4e86\u3002 \u6211\u9084\u6d3b\u7740\uff01 TCP Keep-Alive 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Chen\"\/>\n\t<meta name=\"google-site-verification\" content=\"-324YR5tomynX5FeTW2lTMHIX0KmPBvpxjXpOhXwi1Q\" \/>\n\t<link rel=\"canonical\" href=\"https:\/\/hyc.eshachem.com\/program\/tcp-keep-alive\/\" \/>\n\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 4.9.10\" \/>\n\t\t<meta property=\"og:locale\" content=\"en_US\" \/>\n\t\t<meta property=\"og:site_name\" content=\"HyC Wiki - Technical articles\" \/>\n\t\t<meta property=\"og:type\" content=\"article\" \/>\n\t\t<meta property=\"og:title\" content=\"TCP &amp; Keep-Alive - HyC Wiki\" \/>\n\t\t<meta property=\"og:description\" content=\"TCP \u4e09\u5411\u4ea4\u63e1 TCP \u9023\u7dda\uff08Transmission Control Protocol\uff0c\u50b3\u8f38\u63a7\u5236\u5354\u5b9a\uff09 \u5efa\u7acb TCP \u9023\u7dda TCP 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property=\"og:image\" content=\"https:\/\/hyc.eshachem.com\/program\/wp-content\/uploads\/2026\/06\/cropped-cropped-\u672a\u547d\u540d\u8a2d\u8a08-4.png\" \/>\n\t\t<meta property=\"og:image:secure_url\" content=\"https:\/\/hyc.eshachem.com\/program\/wp-content\/uploads\/2026\/06\/cropped-cropped-\u672a\u547d\u540d\u8a2d\u8a08-4.png\" \/>\n\t\t<meta property=\"og:image:width\" content=\"64\" \/>\n\t\t<meta property=\"og:image:height\" content=\"64\" \/>\n\t\t<meta property=\"article:published_time\" content=\"2026-07-05T07:16:15+00:00\" \/>\n\t\t<meta property=\"article:modified_time\" content=\"2026-07-05T07:18:06+00:00\" \/>\n\t\t<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n\t\t<meta name=\"twitter:title\" content=\"TCP &amp; Keep-Alive - HyC Wiki\" \/>\n\t\t<meta name=\"twitter:description\" content=\"TCP \u4e09\u5411\u4ea4\u63e1 TCP \u9023\u7dda\uff08Transmission Control Protocol\uff0c\u50b3\u8f38\u63a7\u5236\u5354\u5b9a\uff09 \u5efa\u7acb TCP \u9023\u7dda TCP 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\u8cc7\u6599\u5eab\u6536\u5230\u5f8c\u56de\u50b3\uff1a\u300c\u807d\u5f97\u5230\uff01\u6211\u9019\u908a\u6e96\u5099\u597d\u4e86\u3002\u90a3\u4f60\u807d\u5f97\u5230\u6211\u8aaa\u8a71\u55ce\uff1f\u300d \u7b2c\u4e09\u6b65\uff08ACK\uff09\uff1a \u4f3a\u670d\u5668\u518d\u6b21\u78ba\u8a8d\uff1a\u300c\u807d\u5230\u4e86\uff01\u90a3\u6211\u5011\u6b63\u5f0f\u958b\u59cb\u9023\u7dda\u5427\uff01\u300d \u7d93\u904e\u9019\u4e09\u6b21\u4e00\u4f86\u4e00\u56de\u7684\u300c\u4ea4\u63e1\u300d\uff0c\u4e00\u689d\u5b89\u5168\u7684 TCP \u9023\u7dda\u901a\u9053\u5c31\u6b63\u5f0f\u958b\u901a\u4e86\uff0c\u63a5\u4e0b\u4f86\u96d9\u65b9\u624d\u80fd\u958b\u59cb\u50b3\u9001 SQL \u8a9e\u6cd5\u548c\u8cc7\u6599\u3002 \u95dc\u9589 TCP \u9023\u7dda\uff08\u56db\u6b21\u63ee\u624b\uff09 \u7576\u8cc7\u6599\u50b3\u5b8c\u3001\u4e8b\u60c5\u8fa6\u5b8c\u4e86\uff0c\u5fc5\u9808\u628a\u901a\u9053\u95dc\u9589\uff0c\u91cb\u653e\u8a18\u61b6\u9ad4\u3002\u9019\u500b\u904e\u7a0b\u53eb \u300c\u56db\u6b21\u63ee\u624b\u300d\uff08Four-Way Handshake\uff09\uff1a \u4f3a\u670d\u5668\uff1a\u300c\u6211\u7684\u8cc7\u6599\u50b3\u5b8c\u4e86\uff0c\u6211\u60f3\u95dc\u9589\u9023\u7dda\u56c9\u3002\u300d \u8cc7\u6599\u5eab\uff1a\u300c\u6536\u5230\uff0c\u6211\u77e5\u9053\u4f60\u60f3\u95dc\u9589\u4e86\u3002\u4f46\u6211\u624b\u908a\u9084\u6709\u6700\u5f8c\u4e00\u5169\u7b46\u8cc7\u6599\u8981\u8655\u7406\uff0c\u4f60\u7b49\u6211\u4e00\u4e0b\u3002\u300d \u8cc7\u6599\u5eab\uff08\u8655\u7406\u5b8c\u5f8c\uff09\uff1a\u300c\u597d\u4e86\uff0c\u6211\u9019\u908a\u4e5f\u641e\u5b9a\u4e86\uff0c\u53ef\u4ee5\u6b63\u5f0f\u95dc\u9589\u4e86\u3002\u300d \u4f3a\u670d\u5668\uff1a\u300c\u6536\u5230\uff0c\u90a3\u518d\u898b\uff01\u300d\uff08\u6b63\u5f0f\u4e2d\u65b7\u9023\u7dda\uff09 \u983b\u7e41\u958b\u95dc TCP \u9023\u7dda \u5f88\u50b7\u6548\u80fd\uff01\u56e0\u7232\u524d\u7aef\u6bcf\u767c\u9001\u4e00\u500b\u8acb\u6c42\uff0c\u4f3a\u670d\u5668\u5c31\u8981\u8ddf\u8cc7\u6599\u5eab\u7d93\u6b77\u300c\u4e09\u5411\u4ea4\u63e1\uff08\u958b\uff09\u300d\u5230\u300c\u50b3\u8cc7\u6599\u300d\u518d\u5230\u300c\u56db\u6b21\u63ee\u624b\uff08\u95dc\uff09\u300d\u3002\u5149\u662f\u70ba\u4e86\u8b1b\u4e00\u53e5\u8a71\uff0c\u80cc\u5f8c\u5c31\u8981\u8b1b 7 \u53e5\u5ee2\u8a71\uff08\u958b\u95dc\u7684\u5c01\u5305\u5f80\u8fd4\uff09\u3002\u9019\u6703\u5c0e\u81f4\u7db2\u9801\u56de\u61c9\u8b8a\u5f97\u5f88\u6162\u3002 \u6240\u4ee5\u5728\u8207\u8cc7\u6599\u5eab\u9023\u7dda\u7684\u6642\u5019\u624d\u6703\u5efa\u7acb\u9023\u7dda\u6c60\uff01 TCP Keep-Alive 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