{"id":976,"date":"2025-12-27T11:13:11","date_gmt":"2025-12-27T03:13:11","guid":{"rendered":"https:\/\/www.52runoob.com\/?p=976"},"modified":"2025-12-27T11:13:11","modified_gmt":"2025-12-27T03:13:11","slug":"tcp%e4%b8%89%e6%ac%a1%e6%8f%a1%e6%89%8b","status":"publish","type":"post","link":"https:\/\/www.52runoob.com\/index.php\/2025\/12\/27\/tcp%e4%b8%89%e6%ac%a1%e6%8f%a1%e6%89%8b\/","title":{"rendered":"tcp\u4e09\u6b21\u63e1\u624b"},"content":{"rendered":"\n<p>TCP\u4e09\u6b21\u63e1\u624b\uff08Three-Way Handshake\uff09\u662fTCP\u8fde\u63a5\u5efa\u7acb\u7684\u8fc7\u7a0b\uff0c\u786e\u4fdd\u5ba2\u6237\u7aef\u548c\u670d\u52a1\u5668\u4e4b\u95f4\u7684\u53ef\u9760\u901a\u4fe1\u3002\u5176\u4e3b\u8981\u76ee\u7684\u662f\u540c\u6b65\u53cc\u65b9\u7684\u5e8f\u5217\u53f7\u3001\u786e\u8ba4\u5f7c\u6b64\u7684\u63a5\u6536\u80fd\u529b\uff0c\u5e76\u786e\u4fdd\u53cc\u65b9\u90fd\u51c6\u5907\u597d\u8fdb\u884c\u6570\u636e\u4f20\u8f93\u3002\u5177\u4f53\u8fc7\u7a0b\u5982\u4e0b\uff1a<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">1. <strong>SYN\uff08\u540c\u6b65\uff09<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u5ba2\u6237\u7aef<\/strong>\u5411\u670d\u52a1\u5668\u53d1\u9001\u4e00\u4e2aSYN\uff08\u540c\u6b65\u5e8f\u5217\u7f16\u53f7\uff09\u5305\uff0c\u7528\u6765\u8bf7\u6c42\u5efa\u7acb\u8fde\u63a5\u3002\u8fd9\u4e2a\u5305\u7684\u6807\u5fd7\u4f4dSYN\u4e3a1\uff0c\u5ba2\u6237\u7aef\u968f\u673a\u9009\u62e9\u4e00\u4e2a\u521d\u59cb\u5e8f\u5217\u53f7\uff08ISN\uff0cInitial Sequence Number\uff09\uff0c\u5047\u8bbe\u4e3a <code>Seq = X<\/code>\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u5ba2\u6237\u7aef\u53d1\u9001\u7684\u6570\u636e\u5305\u793a\u610f\uff1a<\/p>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: plain; title: ; notranslate\" title=\"\">\nClient \u2192 Server : SYN, Seq = X\n\n<\/pre><\/div>\n\n\n<h3 class=\"wp-block-heading\">2. <strong>SYN-ACK\uff08\u540c\u6b65-\u786e\u8ba4\uff09<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u670d\u52a1\u5668<\/strong>\u6536\u5230\u5ba2\u6237\u7aef\u7684SYN\u5305\u540e\uff0c\u8fd4\u56de\u4e00\u4e2aSYN-ACK\u5305\uff0c\u8868\u793a\u540c\u610f\u5efa\u7acb\u8fde\u63a5\u3002\u6b64\u5305\u7684SYN\u6807\u5fd7\u4f4d\u4e3a1\uff0cACK\u6807\u5fd7\u4f4d\u4e3a1\uff0c\u670d\u52a1\u5668\u9009\u62e9\u81ea\u5df1\u7684\u521d\u59cb\u5e8f\u5217\u53f7 <code>Seq = Y<\/code>\uff0c\u5e76\u786e\u8ba4\u5ba2\u6237\u7aef\u7684\u5e8f\u5217\u53f7\u52a01\uff08\u5373 <code>Ack = X + 1<\/code>\uff09\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u670d\u52a1\u5668\u8fd4\u56de\u7684\u6570\u636e\u5305\u793a\u610f\uff1a<\/p>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: plain; title: ; notranslate\" title=\"\">\nServer \u2192 Client : SYN, Ack = X + 1, Seq = Y\n\n<\/pre><\/div>\n\n\n<h3 class=\"wp-block-heading\">3. <strong>ACK\uff08\u786e\u8ba4\uff09<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u5ba2\u6237\u7aef<\/strong>\u6536\u5230\u670d\u52a1\u5668\u7684SYN-ACK\u5305\u540e\uff0c\u5411\u670d\u52a1\u5668\u53d1\u9001\u4e00\u4e2a\u786e\u8ba4\u5305\uff0c\u6807\u5fd7\u4f4dACK\u4e3a1\uff0c\u786e\u8ba4\u53f7\uff08Ack\uff09\u662f <code>Y + 1<\/code>\uff0c\u8868\u793a\u786e\u8ba4\u6536\u5230\u4e86\u670d\u52a1\u5668\u7684\u5e8f\u5217\u53f7\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u5ba2\u6237\u7aef\u8fd4\u56de\u7684\u6570\u636e\u5305\u793a\u610f\uff1a<\/p>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: plain; title: ; notranslate\" title=\"\">\nClient \u2192 Server : Ack = Y + 1\n\n<\/pre><\/div>\n\n\n<p>\u6b64\u65f6\uff0cTCP\u8fde\u63a5\u5df2\u7ecf\u5efa\u7acb\uff0c\u53cc\u65b9\u53ef\u4ee5\u5f00\u59cb\u6570\u636e\u4f20\u8f93\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u603b\u7ed3\uff1a<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u5ba2\u6237\u7aef \u2192 \u670d\u52a1\u5668<\/strong>: SYN, Seq = X<\/li>\n\n\n\n<li><strong>\u670d\u52a1\u5668 \u2192 \u5ba2\u6237\u7aef<\/strong>: SYN-ACK, Seq = Y, Ack = X + 1<\/li>\n\n\n\n<li><strong>\u5ba2\u6237\u7aef \u2192 \u670d\u52a1\u5668<\/strong>: ACK, Ack = Y + 1<\/li>\n<\/ul>\n\n\n\n<p>\u8fd9\u4e2a\u8fc7\u7a0b\u786e\u4fdd\u4e86\u53cc\u65b9\u90fd\u80fd\u540c\u6b65\u5404\u81ea\u7684\u521d\u59cb\u5e8f\u5217\u53f7\uff0c\u5e76\u786e\u8ba4\u5bf9\u65b9\u7684\u63a5\u6536\u80fd\u529b\uff0c\u907f\u514d\u4e86\u6570\u636e\u4e22\u5931\u6216\u9519\u8bef\u7684\u53d1\u751f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>TCP\u4e09\u6b21\u63e1\u624b\uff08Three-Way Handshake\uff09\u662fTCP\u8fde\u63a5\u5efa\u7acb\u7684\u8fc7\u7a0b\uff0c&#8230; <a class=\"more-link\" href=\"https:\/\/www.52runoob.com\/index.php\/2025\/12\/27\/tcp%e4%b8%89%e6%ac%a1%e6%8f%a1%e6%89%8b\/\">Continue Reading &rarr;<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-976","post","type-post","status-publish","format-standard","hentry","category-1"],"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/www.52runoob.com\/index.php\/wp-json\/wp\/v2\/posts\/976","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.52runoob.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.52runoob.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.52runoob.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.52runoob.com\/index.php\/wp-json\/wp\/v2\/comments?post=976"}],"version-history":[{"count":1,"href":"https:\/\/www.52runoob.com\/index.php\/wp-json\/wp\/v2\/posts\/976\/revisions"}],"predecessor-version":[{"id":977,"href":"https:\/\/www.52runoob.com\/index.php\/wp-json\/wp\/v2\/posts\/976\/revisions\/977"}],"wp:attachment":[{"href":"https:\/\/www.52runoob.com\/index.php\/wp-json\/wp\/v2\/media?parent=976"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.52runoob.com\/index.php\/wp-json\/wp\/v2\/categories?post=976"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.52runoob.com\/index.php\/wp-json\/wp\/v2\/tags?post=976"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}