{"id":94,"date":"2026-06-07T17:57:33","date_gmt":"2026-06-07T09:57:33","guid":{"rendered":"https:\/\/www.everfades.cn\/?p=94"},"modified":"2026-06-07T17:58:18","modified_gmt":"2026-06-07T09:58:18","slug":"%e6%b5%85%e8%b0%88tcp%e7%b2%98%e5%8c%85%e5%8f%8a%e5%85%b6%e8%a7%a3%e5%86%b3%e6%96%b9%e6%b3%95","status":"publish","type":"post","link":"https:\/\/www.everfades.cn\/index.php\/2026\/06\/07\/%e6%b5%85%e8%b0%88tcp%e7%b2%98%e5%8c%85%e5%8f%8a%e5%85%b6%e8%a7%a3%e5%86%b3%e6%96%b9%e6%b3%95\/","title":{"rendered":"\u6d45\u8c08TCP\u7c98\u5305\u53ca\u5176\u89e3\u51b3\u65b9\u6cd5"},"content":{"rendered":"<p>\u2014\u2014by Everfades<\/p>\n<p>\u200b \u9274\u4e8e\u7b14\u8005\u6c34\u5e73\u6709\u9650\uff0c\u90e8\u5206\u8bb2\u89e3\u53ef\u80fd\u5b58\u5728\u4e0d\u89c4\u8303\uff0c\u4e8e\u6b64\u8fd8\u671b\u89c1\u8c05\uff0c\u5982\u679c\u60a8\u6709\u5b9d\u8d35\u7684\u610f\u89c1\u6216\u5efa\u8bae\uff0c\u8bf7\u53d1\u90ae\u4ef6\u81f3:everfades1218@gmail.com\u6216everfades@foxmail.com<\/p>\n<p>\u5e0c\u671b\u5927\u5bb6\u80fd\u4ece\u8fd9\u7bc7\u7b14\u8bb0\u4e2d\u53d6\u5f97\u4e00\u4e9b\u6536\u83b7\uff01<\/p>\n<p>\uff08\u26a0\u5728\u4f7f\u7528Typora\u9605\u8bfb\u524d\uff0c\u8bf7\u5c06\u6587\u4ef6\u2192\u504f\u597d\u8bbe\u7f6e\u2192Markdown\u2192\u5185\u8054\u516c\u5f0f \u52fe\u9009\u4e0a\uff0c\u4ee5\u514d\u663e\u793a\u51fa\u9519\uff01\uff09<\/p>\n<p>&nbsp;<\/p>\n<h2>\u4e00.\u4ec0\u4e48\u662fTCP\uff1f<\/h2>\n<p>\u200b \u5728\u7814\u7a76TCP\u7c98\u5305\u4e4b\u524d\uff0c\u6211\u4eec\u5148\u6765\u770b\u770b\u4ec0\u4e48\u662fTCP\uff1aTCP\u5168\u79f0<strong>Transmission Control Protocol<\/strong>\uff0c\u4e5f\u53eb\u4f20\u8f93\u63a7\u5236\u534f\u8bae\uff0c\u4e00\u822c\u548cIP\u7ec4\u5408\u6210TCP\/IP\u7f51\u7edc\u6838\u5fc3\uff0c\u5176\u5728\u7f51\u7edc\u901a\u4fe1\u4e2d\u8d77\u5230\u4e86\u4e0d\u53ef\u6216\u7f3a\u7684\u4f5c\u7528\u3002\u4e00\u822c\u6765\u8bf4TCP\u7684\u6d41\u7a0b\u5982\u4e0b\uff1a<\/p>\n<p><strong>1.\u4e09\u6b21\u63e1\u624b(\u5efa\u7acb\u8fde\u63a5)<\/strong><\/p>\n<ol>\n<li>\u5ba2\u6237\u7aef -&gt; \u670d\u52a1\u7aef\uff1aSYN\uff08\u8bf7\u6c42\u8fde\u63a5\uff09<\/li>\n<li>\u670d\u52a1\u7aef -&gt; \u5ba2\u6237\u7aef\uff1aSYN + ACK\uff08\u540c\u610f+\u786e\u8ba4\uff09<\/li>\n<li>\u5ba2\u6237\u7aef -&gt; \u670d\u52a1\u7aef\uff1aACK\uff08\u51c6\u5907\u5c31\u7eea\uff09<\/li>\n<\/ol>\n<p><strong>2.\u56db\u6b21\u6325\u624b\uff08\u65ad\u5f00\u8fde\u63a5\uff09<\/strong><\/p>\n<ol>\n<li>\u5ba2\u6237\u7aef\u53d1\u51faFIN\uff0c\u8868\u793a\u4e0d\u518d\u53d1\u51fa\u6570\u636e<\/li>\n<li>\u670d\u52a1\u7aef\u56de\u590dACK\uff0c\u8868\u793a\u5df2\u7ecf\u6536\u5230\u5173\u95ed\u8bf7\u6c42<\/li>\n<li>\u670d\u52a1\u7aef\u53d1\u51faFIN\uff0c\u8868\u793a\u6211\u65b9\u7684\u6570\u636e\u5df2\u7ecf\u53d1\u5b8c\uff0c\u53ef\u4ee5\u5173\u95ed<\/li>\n<li>\u5ba2\u6237\u7aef\u56de\u590dACK\uff0c\u8868\u793a\u786e\u8ba4\u65ad\u5f00<\/li>\n<\/ol>\n<p>\u901a\u8fc7\u4e09\u6b21\u63e1\u624b\u56db\u6b21\u6325\u624b\uff0cTCP\u4fdd\u8bc1\u4e86\u6570\u636e\u4e0d\u4e22\u5305\uff0c\u4e0d\u9519\u4e71\uff0c\u4e0d\u91cd\u590d\u3002<\/p>\n<h2>\u4e8c.\u4ec0\u4e48\u662fTCP\u7c98\u5305\u3001\u62c6\u5305\uff1f<\/h2>\n<p>\u200b TCP\u7684\u6570\u636e\u6536\u53d1\u91c7\u53d6\u7684\u662f\u5b57\u8282\u6d41\u534f\u8bae\uff0c\u65e2\u7136\u662f\u6d41\u534f\u8bae\uff0c\u4e3a\u4ec0\u4e48\u8fd8\u4f1a\u6709\u5305\u7684\u6982\u5ff5\u5462\uff1f\u5176\u5b9e\u8fd9\u4e2a\u6240\u8c13\u7684TCP\u7c98\u5305\uff0c\u662f\u4f53\u73b0\u5728\u670d\u52a1\u7aef\u7684&#8221;\u7c98\u5305&#8221;\u3002\u800c\u7c98\u5305\u53c8\u5206\u4e3a<strong>\u53d1\u9001\u7c98\u5305<\/strong>\u548c<strong>\u63a5\u6536\u7c98\u5305<\/strong>\uff0c\u524d\u8005\u662f\u6307<strong>\u53d1\u9001\u65b9\u7f13\u51b2\u533a\u6570\u636e\u6512\u591a\u5e27\u4e00\u6b21\u6027\u53d1\u51fa\uff0c\u5bfc\u81f4\u591a\u4e2a\u903b\u8f91\u5305\u62fc\u6210\u4e00\u5757<\/strong>\uff1b\u800c\u540e\u8005\u662f\u6307<strong>\u63a5\u6536\u7f13\u51b2\u533a\u79ef\u6512\u591a\u6761\u6570\u636e\uff0c\u4e00\u6b21\u8bfb\u53d6\u62ff\u5230\u591a\u4e2a\u6570\u636e\u5305\u3002<\/strong><\/p>\n<p>\u200b \u65e0\u8bba\u662f\u54ea\u79cd\u7c98\u5305\uff0c\u6700\u540e\u90fd\u4f1a\u5bfc\u81f4\u5728recv\u7684\u65f6\u5019\u4e00\u6b21\u6027\u62ff\u5230\u591a\u6761\u6570\u636e\uff0c\u65e0\u6cd5\u5206\u6e05\u8fb9\u754c\u3002<\/p>\n<p>\u200b \u62c6\u5305\u548c\u7c98\u5305\u6070\u6070\u76f8\u53cd\uff0c\u62c6\u5305\u662f<strong>\u628a\u4e00\u4efd\u5b8c\u6574\u7684\u5355\u4e2a\u4e1a\u52a1\u6570\u636e\u5305\uff0c\u62c6\u6210\u591a\u6bb5\u5206\u6b21\u6536\u5230\uff0c\u4e00\u6b21 recv \u53ea\u62ff\u5230\u90e8\u5206\u7247\u6bb5\u3002<\/strong><\/p>\n<h2>\u4e09.\u4e3a\u4ec0\u4e48\u4f1a\u51fa\u73b0\u7c98\u5305\u3001\u62c6\u5305\u7684\u60c5\u51b5\uff1f<\/h2>\n<p>\u200b \u51fa\u73b0\u7c98\u5305\u7684\u6838\u5fc3\u539f\u56e0\u5c31\u662f<strong>TCP \u662f\u9762\u5411\u5b57\u8282\u6d41\u7684\u534f\u8bae\uff0c\u534f\u8bae\u5c42\u672c\u8eab\u4e0d\u643a\u5e26\u5e94\u7528\u6d88\u606f\u8fb9\u754c\uff0c\u64cd\u4f5c\u7cfb\u7edf\u53ea\u8d1f\u8d23\u6536\u53d1\u8fde\u7eed\u5b57\u8282\u6d41\uff0c\u65e0\u6cd5\u533a\u5206\u5e94\u7528\u5c42\u4e00\u6761\u6d88\u606f\u7684\u8d77\u6b62\u4f4d\u7f6e<\/strong>\u3002<\/p>\n<p>\u200b \u4e3e\u4e2a\u4f8b\u5b50\uff0c\u53d1\u9001\u65b9\u53d1\u9001\u4e86\u4e24\u6761\u6d88\u606f\uff1a<\/p>\n<pre><code>send(\"Hello\")\nsend(\"World\")<\/code><\/pre>\n<p>\u200b \u4f46\u662fTCP\u53ea\u770b\u5230\u4e86\u8fde\u7eed\u5b57\u8282\u6d41\uff1a<\/p>\n<pre><code>HelloWorld<\/code><\/pre>\n<p>\u200b \u663e\u7136\uff0c\u63a5\u6536\u65b9\u4e00\u6b21 recv() \u5230\u591a\u5c11\u5b57\u8282\uff0c\u5e76\u4e0d\u7b49\u4e8e\u53d1\u9001\u65b9\u4e00\u6b21 send() \u53d1\u4e86\u591a\u5c11\u5b57\u8282\u3002<\/p>\n<p>\u5b9e\u9645\u89e6\u53d1\u7c98\u5305\u5206\u4e3a\u4e24\u7c7b\u573a\u666f\uff1a<\/p>\n<ol>\n<li><strong>\u53d1\u9001\u4fa7\u5408\u5e76\u7c98\u5305<\/strong>\uff1a\n<p>\u2460\u5f00\u542f Nagle \u7b97\u6cd5\u65f6\u7cfb\u7edf\u4e3b\u52a8\u7f13\u5b58\u5c0f\u5305\u3001\u7b49\u5f85\u5408\u5e76\u53d1\u9001\uff1b<\/p>\n<p>\u2461\u77ed\u65f6\u95f4\u591a\u6b21\u53d1\u9001\u5c11\u91cf\u6570\u636e\uff0c\u53d1\u9001\u7f13\u51b2\u533a\u5c1a\u6709\u5bcc\u4f59\uff0c\u5185\u6838\u5c06\u591a\u6bb5\u5e94\u7528\u6570\u636e\u7f13\u5b58\u540e\u5c01\u88c5\u4e3a\u5355\u4e2a TCP \u62a5\u6587\u53d1\u9001\uff1b<\/li>\n<li>\u63a5\u6536\u4fa7\u5408\u5e76\u7c98\u5305\uff1a\n<p>\u5bf9\u7aef\u4e00\u4e2a TCP \u62a5\u6587\u643a\u5e26\u591a\u6761\u5e94\u7528\u6570\u636e\u5b58\u5165\u672c\u673a\u63a5\u6536\u7f13\u51b2\u533a\uff0c\u5e94\u7528\u5355\u6b21recv\u8bfb\u53d6\u7f13\u51b2\u533a\u5168\u90e8\u6570\u636e\uff0c\u4e00\u6b21\u6027\u62ff\u5230\u591a\u6761\u4e1a\u52a1\u6d88\u606f\uff0c\u5f62\u6210\u7c98\u5305\u3002<\/p>\n<p>Nagle \u7b97\u6cd5\u3001\u53d1\u9001\u7f13\u51b2\u533a\u6512\u5305\u3001\u63a5\u6536\u7f13\u51b2\u533a\u6279\u91cf\u8bfb\u6570\u636e\uff0c\u90fd\u53ea\u662f\u7c98\u5305\u7684\u5e38\u89c1\u8bf1\u56e0\uff0c\u800c\u975e\u672c\u8d28\u539f\u56e0\u3002<\/li>\n<\/ol>\n<p>\u62c6\u5305\u7684\u539f\u56e0\u4e5f\u7c7b\u4f3c\uff1a<strong>\u5176\u672c\u8d28\u539f\u56e0\u662f TCP \u662f\u5b57\u8282\u6d41\u534f\u8bae\uff0c\u52a0\u4e0a MSS\/MTU\u3001\u7f13\u51b2\u533a\u3001\u7a97\u53e3\u63a7\u5236\u3001\u62e5\u585e\u63a7\u5236\u548c\u63a5\u6536\u65b9\u8bfb\u53d6\u5927\u5c0f\u7b49\u56e0\u7d20\uff0c\u5bfc\u81f4\u4e00\u6761\u5e94\u7528\u5c42\u6d88\u606f\u53ef\u80fd\u88ab\u5206\u6210\u591a\u6b21\u63a5\u6536\u3002<\/strong>\u5176\u4e2d\uff0c\u4e00\u822cMTU\u662f\u8def\u7531\u5668\u7684\u6700\u5927\u4f20\u8f93\u5355\u5143\uff0c\u6765\u5b9a\u4e49\u4e00\u4e2a\u6570\u636e\u5305\u7684\u5927\u5c0f\uff0c\u5f53\u6570\u636e\u5305\u5927\u5c0f\u8d85\u8fc7MTU\u9650\u5236\u7684\u65f6\u5019\uff0c\u4f1a\u6309MTU\u5206\u6210\u51e0\u4e2a\u5305\uff0c\u5bf9\u4e8e\u5bb6\u5ead\u548c\u529e\u516c\u8def\u7531\u5668\uff0cMTU\u7684\u9ed8\u8ba4\u5927\u5c0f\u4e00\u822c\u4e3a1500\u5b57\u8282\u3002<\/p>\n<h2>\u56db.\u5982\u4f55\u89e3\u51b3TCP\u7c98\u5305\u62c6\u5305\u95ee\u9898\uff1f<\/h2>\n<p>\u200b \u4e00\u822c\u6709\u4e09\u79cd\u89e3\u51b3\u529e\u6cd5\uff1a\u5b9a\u957f\u5206\u5272\u6cd5\uff0c\u5206\u9694\u7b26\u6cd5\uff0c\u957f\u5ea6\u5b57\u6bb5\u6cd5\u3002<\/p>\n<h3>1.\u5b9a\u957f\u5206\u5272\u6cd5\uff1a<\/h3>\n<p>\u200b \u987e\u540d\u601d\u4e49\uff0c\u5b9a\u957f\u5206\u5272\u6cd5\u5c31\u662f\u5728\u63a5\u6536\u6d88\u606f\u7684\u65f6\u5019\u6309\u7167\u56fa\u5b9a\u7684\u957f\u5ea6\u63a5\u6536\u6d88\u606f\uff0c\u4e0d\u8db3\u7684\u90e8\u5206\u4f1a\u8865\u7a7a\u683c\u6216\u5176\u4ed6\u586b\u5145\u5b57\u7b26\uff0c\u8fd9\u6837\u65e0\u8bba\u6570\u636e\u5305\u88ab\u5982\u4f55\u5206\u5272\uff0c\u63a5\u53d7\u653e\u90fd\u80fd\u591f\u6309\u7167\u56fa\u5b9a\u7684\u957f\u5ea6\u6765\u89e3\u6790\uff0c\u6211\u4eec\u5e38\u89c1\u7684FTP(File Transfer Protocol)\u5c31\u662f\u91c7\u7528\u8fd9\u79cd\u65b9\u6848\uff08FTP\u7684\u5e95\u5c42\u4f20\u8f93\u4e00\u822c\u4e5f\u662f\u57fa\u4e8eTCP\u7684\uff09\u3002<\/p>\n<p>\u200b \u4f18\u70b9\uff1a\u89e3\u6790\u7a33\u5b9a\uff0c\u4e0d\u5bb9\u6613\u51fa\u95ee\u9898\u3002<\/p>\n<p>\u200b \u7f3a\u70b9\uff1a\u6d6a\u8d39\u7a7a\u95f4\uff0c\u6548\u7387\u8f83\u4f4e\u3002<\/p>\n<p><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/picbeds-1403930428.cos.ap-beijing.myqcloud.com\/%E6%B5%85%E8%B0%88TCP%E7%B2%98%E5%8C%85%E5%8F%8A%E5%85%B6%E8%A7%A3%E5%86%B3%E6%96%B9%E6%B3%95\/%E5%AE%9A%E9%95%BF%E5%88%86%E5%89%B2%E6%B3%95.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/picbeds-1403930428.cos.ap-beijing.myqcloud.com\/%E6%B5%85%E8%B0%88TCP%E7%B2%98%E5%8C%85%E5%8F%8A%E5%85%B6%E8%A7%A3%E5%86%B3%E6%96%B9%E6%B3%95\/%E5%AE%9A%E9%95%BF%E5%88%86%E5%89%B2%E6%B3%95.png\" 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