{"id":96,"date":"2016-01-06T23:06:55","date_gmt":"2016-01-06T15:06:55","guid":{"rendered":"https:\/\/blog.espnlol.com\/?p=96"},"modified":"2016-01-06T23:06:55","modified_gmt":"2016-01-06T15:06:55","slug":"tcpip%e7%9a%84%e4%b8%89%e6%ac%a1%e6%8f%a1%e6%89%8b%e4%b8%8e%e5%9b%9b%e6%ac%a1%e6%8c%a5%e6%89%8b%e8%af%a6%e8%a7%a3","status":"publish","type":"post","link":"https:\/\/blog.espnlol.com\/?p=96","title":{"rendered":"TCP\/IP\u7684\u4e09\u6b21\u63e1\u624b\u4e0e\u56db\u6b21\u6325\u624b\u8be6\u89e3"},"content":{"rendered":"<p>TCP((Transmission Control Protocol)\u4f20\u8f93\u63a7\u5236\u534f\u8bae\uff0c\u662f\u4e00\u4e2a\u9762\u5411\u8fde\u63a5\u7684\u534f\u8bae\u3002\u5728\u8fd0\u7528\u6b64\u534f\u8bae\u8fdb\u884c\u6570\u636e\u4f20\u8f93\u524d\u90fd\u4f1a\u8fdb\u884c\u8fde\u63a5\u7684\u5efa\u7acb\u5de5\u4f5c\uff08\u4e09\u6b21\u63e1\u624b\uff09\uff1b\u5f53\u6570\u636e\u4f20\u8f93\u5b8c\u6bd5\uff0c\u8fde\u63a5\u7684\u53cc\u65b9\u90fd\u4f1a\u901a\u77e5\u5bf9\u65b9\u8981\u91ca\u653e\u6b64\u8fde\u63a5\uff08\u56db\u6b21\u6325\u624b\uff09\u3002<\/p>\n<ul class=\"list-paddingleft-2\">\n<li><strong>\u8ba4\u8bc6TCP\u6807\u5fd7\u4f4d<\/strong>\n<p>tcp\u6807\u5fd7\u4f4d\u67096\u79cd\u6807\u793a:<\/p>\n<p>SYN(synchronous\u5efa\u7acb\u8054\u673a)<\/p>\n<p>ACK(acknowledgement \u786e\u8ba4)<\/p>\n<p>PSH(push\u4f20\u9001)<\/p>\n<p>FIN(finish\u7ed3\u675f)<\/p>\n<p>RST(reset\u91cd\u7f6e)<\/p>\n<p>URG(urgent\u7d27\u6025)<\/li>\n<\/ul>\n<ul class=\"list-paddingleft-2\">\n<li><strong>\u56fe\u89e3TCP\u4e0eUDP\u7684\u4e09\u6b21\u63e1\u624b\u4e0e\u56db\u6b21\u6325\u624b\u8fc7\u7a0b<\/strong>\n<p><a href=\"http:\/\/img1.51cto.com\/attachment\/201312\/150141960.png\" target=\"_blank\"><img decoding=\"async\" style=\"padding: 0px; margin: 0px; vertical-align: top; border: none;\" title=\"TCP\u8fde\u63a5\u91ca\u653e.png\" src=\"http:\/\/img1.51cto.com\/attachment\/201312\/150141960.png\" alt=\"150141960.png\" width=\"650\" \/><\/a><\/li>\n<\/ul>\n<p><strong>\u4e09\u6b21\u63e1\u624b\u8fc7\u7a0b\uff1a<\/strong><\/p>\n<p>\u7b2c\u4e00\u6b21\u63e1\u624b\uff1ahost1\u53d1\u9001\u4e00\u4e2aTCP\u6807\u5fd7\u4f4d<strong>SYN=1<\/strong>\u3001ACK=0\u7684\u6570\u636e\u5305\u7ed9host2\uff0c\u5e76\u968f\u673a\u4f1a\u4ea7\u751f\u4e00\u4e2aSequence number=3233.\u5f53host2\u63a5\u6536\u5230\u8fd9\u4e2a\u6570\u636e\u540e\uff0chost2\u7531SYN=1\u53ef\u77e5\u5ba2\u6237\u7aef\u662f\u60f3\u8981\u5efa\u7acb\u8fde\u63a5\uff1b<\/p>\n<p>\u7b2c\u4e8c\u6b21\u63e1\u624b\uff1ahost2\u8981\u5bf9\u5ba2\u6237\u7aef\u7684\u8054\u673a\u8bf7\u6c42\u8fdb\u884c\u786e\u8ba4\uff0c\u5411host1\u53d1\u9001\u5e94\u7b54\u53f7<strong>AC<\/strong><strong>K=1<\/strong>\u3001<strong>SYN<\/strong><strong>=1<\/strong>\u3001<\/p>\n<p>\u786e\u8ba4\u53f7Acknowledge number=3234\uff0c\u6b64\u503c\u662fhost1\u7684\u5e8f\u5217\u53f7\u52a01\uff0c\u8fd8\u4f1a\u4ea7\u751f\u4e00\u4e2a\u968f\u673a\u7684\u5e8f\u5217\u53f7Sequence number=36457\uff0c\u8fd9\u6837\u5c31\u544a\u8bc9host1\u53ef\u4ee5\u8fdb\u884c\u8fde\u63a5\uff1b<\/p>\n<p>\u7b2c\u4e09\u6b21\u63e1\u624b\uff1ahost1\u6536\u5230\u6570\u636e\u540e\u68c0\u67e5Acknowledge number\u662f\u5426\u662f3233+1\u7684\u503c\uff0c\u4ee5\u53caACK\u7684\u503c\u662f\u5426\u4e3a1\uff0c\u82e5\u4e3a1\uff0chost1\u4f1a\u53d1\u9001<strong>ACK=1<\/strong>\u3001\u786e\u8ba4\u53f7\u7801Acknowledge number=36457\uff0c\u544a\u8bc9host2,\u4f60\u7684\u8bf7\u6c42\u8fde\u63a5\u88ab\u786e\u8ba4\uff0c\u8fde\u63a5\u53ef\u4ee5\u5efa\u7acb\u3002<\/p>\n<p><strong>\u56db\u6b21\u6325\u624b\u8fc7\u7a0b\uff1a<\/strong><\/p>\n<p>\u7b2c\u4e00\u6b21\u6325\u624b\uff1a\u5f53\u4f20\u8f93\u7684\u6570\u636e\u5230\u8fbe\u5c3e\u90e8\u65f6\uff0chost1\u5411host2\u53d1\u9001<strong>FIN=1<\/strong>\u6807\u5fd7\u4f4d\uff1b\u53ef\u7406\u89e3\u6210\uff0chost1\u5411host2\u8bf4\uff0c\u6211\u8fd9\u8fb9\u7684\u6570\u636e\u4f20\u9001\u5b8c\u6210\u4e86\uff0c\u6211\u51c6\u5907\u65ad\u5f00\u4e86\u8fde\u63a5\uff1b<\/p>\n<p>\u7b2c\u4e8c\u6b21\u6325\u624b\uff1a\u56e0TCP\u7684\u8fde\u63a5\u662f\u5168\u53cc\u5de5\u7684\u53cc\u5411\u8fde\u63a5\uff0c\u5173\u95ed\u4e5f\u662f\u8981\u4ece\u4e24\u8fb9\u5173\u95ed\uff1b\u5f53host2\u6536\u5230host1\u53d1\u6765\u7684<strong>FIN=1<\/strong>\u7684\u6807\u5fd7\u4f4d\u540e\uff0chost2\u4e0d\u4f1a\u7acb\u523b\u5411host1\u53d1\u9001<strong>FIND=1<\/strong>\u7684\u8bf7\u6c42\u5173\u95ed\u4fe1\u606f\uff0c\u800c\u662f\u5148\u5411host1\u53d1\u9001\u4e00\u4e2a<strong>ACK=1<\/strong>\u7684\u5e94\u7b54\u4fe1\u606f\uff0c\u8868\u793a\uff1a\u4f60\u8bf7\u6c42\u5173\u95ed\u7684\u8bf7\u6c42\u6211\u5df2\u7ecf\u6536\u5230\uff0c\u4f46\u6211\u53ef\u80fd\u8fd8\u6709\u6570\u636e\u6ca1\u6709\u5b8c\u6210\u4f20\u9001\uff0c\u4f60\u518d\u7b49\u4e0b\uff0c\u7b49\u6211\u6570\u636e\u4f20\u8f93\u5b8c\u6210\u4e86\u6211\u5c31\u544a\u8bc9\u4f60\uff1b<\/p>\n<p>\u7b2c\u4e09\u6b21\u6325\u624b\uff1ahost2\u6570\u636e\u4f20\u8f93\u5b8c\u6210\uff0c\u5411host1\u53d1\u9001<strong>FIN=1<\/strong>\uff0chost1\u6536\u5230\u8bf7\u6c42\u5173\u95ed\u8fde\u63a5\u7684\u8bf7\u6c42\u540e\uff0chost1\u5c31\u660e\u767dhost2\u7684\u6570\u636e\u5df2\u4f20\u8f93\u5b8c\u6210\uff0c\u73b0\u5728\u53ef\u4ee5\u65ad\u5f00\u8fde\u63a5\u4e86\uff0c<\/p>\n<p>\u7b2c\u56db\u6b21\u6325\u624b\uff1ahost1\u6536\u5230<strong>FIND=1<\/strong>\u540e\uff0chost1\u8fd8\u662f\u6015\u7531\u4e8e\u7f51\u7edc\u4e0d\u7a33\u5b9a\u7684\u539f\u56e0\uff0c\u6015host2\u4e0d\u77e5\u9053\u4ed6\u8981\u65ad\u5f00\u8fde\u63a5\uff0c\u4e8e\u662f\u5411host2\u53d1\u9001<strong>ACK=1<\/strong>\u786e\u8ba4\u4fe1\u606f\u8fdb\u884c\u786e\u8ba4\uff0c\u628a\u81ea\u5df1\u8bbe\u7f6e\u6210<strong>TIME_WAIT<\/strong>\u72b6\u6001\u5e76\u542f\u52a8\u5b9a\u65f6\u5668\uff0c\u5982\u679chost2\u6ca1\u6709\u6536\u5230ACK\uff0chost2\u7aefTCP\u7684\u5b9a\u65f6\u5668\u5230\u8fbe\u540e\uff0c\u4f1a\u8981\u6c42host1\u91cd\u65b0\u53d1\u9001ACK\uff0c\u5f53host2\u6536\u5230ACK\u540e\uff0chost2\u5c31\u65ad\u5f00\u8fde\u63a5\uff1b\u5f53host1\u7b49\u5f852MLS\uff082\u500d\u62a5\u6587\u6700\u5927\u751f\u5b58\u65f6\u95f4\uff09\u540e\uff0c\u6ca1\u6709\u6536\u5230host2\u7684\u91cd\u4f20\u8bf7\u6c42\u540e\uff0c\u4ed6\u5c31\u77e5\u9053host2\u5df2\u6536\u5230\u4e86ACK\uff0c\u6240\u4ee5host1\u6b64\u65f6\u624d\u5173\u95ed\u81ea\u5df1\u7684\u8fde\u63a5\u3002\u8fd9\u4e00\u70b9\u6211\u89c9\u5f97\u8bbe\u8ba1\u5f97\u975e\u5e38\u5de7\u5999\uff01<\/p>\n<p>\u5199\u7684\u6709\u70b9\u901a\u4fd7\u6613\u61c2\uff0c\u8f6c\u81eahttp:\/\/zhaochj.blog.51cto.com\/368705\/1317226<\/p>\n","protected":false},"excerpt":{"rendered":"<p>TCP((Transmission Control Protocol)\u4f20\u8f93\u63a7\u5236\u534f &hellip; <a href=\"https:\/\/blog.espnlol.com\/?p=96\">\u7ee7\u7eed\u9605\u8bfb <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[21],"tags":[],"class_list":["post-96","post","type-post","status-publish","format-standard","hentry","category-linux"],"_links":{"self":[{"href":"https:\/\/blog.espnlol.com\/index.php?rest_route=\/wp\/v2\/posts\/96","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.espnlol.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.espnlol.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.espnlol.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.espnlol.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=96"}],"version-history":[{"count":1,"href":"https:\/\/blog.espnlol.com\/index.php?rest_route=\/wp\/v2\/posts\/96\/revisions"}],"predecessor-version":[{"id":97,"href":"https:\/\/blog.espnlol.com\/index.php?rest_route=\/wp\/v2\/posts\/96\/revisions\/97"}],"wp:attachment":[{"href":"https:\/\/blog.espnlol.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=96"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.espnlol.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=96"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.espnlol.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=96"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}