{"id":1904,"date":"2009-12-14T23:43:19","date_gmt":"2009-12-14T15:43:19","guid":{"rendered":"http:\/\/wp.chunhsin.idv.tw\/?p=1904"},"modified":"2009-12-14T23:43:19","modified_gmt":"2009-12-14T15:43:19","slug":"%e7%b6%b2%e5%b7%a5%e7%8f%ad%e7%ac%ac%e5%8d%81%e4%b8%80%e5%a4%a9","status":"publish","type":"post","link":"https:\/\/wp.chunhsin.idv.tw\/?p=1904","title":{"rendered":"\u7db2\u5de5\u73ed\u7b2c\u5341\u4e00\u5929"},"content":{"rendered":"

\u4e16\u8cbf\u7db2\u5de5\u73ed\u7b2c\u5341\u4e00\u5929\u3002<\/p>\n

<\/p>\n

TCP\u5354\u5b9a\u50c5\u6703\u5728\u5169\u7aef\u4e3b\u6a5f\u4e0a\u57f7\u884c\uff0c\u4e2d\u9593\u8a2d\u5099\u4e0d\u8ca0\u8cac\u7dad\u8b77\u9023\u7dda\u72c0\u614b\u3002<\/p>\n

TCP timeout\u503c\u9700\u5927\u65bcRRT\u503c(rount trip time)\uff0ctimeout\u592a\u5c0f\u6703\u9020\u6210\u4e0d\u5fc5\u8981\u7684\u91cd\u50b3\uff1b\u592a\u5927\uff0c\u5c0d\u65bcsegment loss\u5075\u6e2c\u53cd\u61c9\u592a\u6162\u3002\u6709\u4e00\u500b\u63a8\u85a6\u516c\u5f0f\uff1a<\/p>\n

Timeout\uff1dRTT(estimated)\uff0b4\u00d7RTT(estimated)<\/p>\n

TCP\u932f\u8aa4\u5fa9\u539f\u6a5f\u5236\u70baGO-BACK-N\u548cSelective Repeat\u6df7\u5408\u578b\u3002<\/p>\n

Congestion(\u81c3\u585e)\u70ba\u7db2\u8def\u5341\u5206\u56b4\u91cd\u7684\u554f\u984c\uff0c\u5176\u539f\u56e0\u662f\u592a\u591a\u4f86\u6e90\u7aef\u4e3b\u6a5f\u9001\u51fa\u4f86\u6e90\u8cc7\u6599\u7d66\u7db2\u8def\uff0c\u800c\u7db2\u8def\u7121\u6cd5\u8655\u7406\u3002<\/p>\n

\u4eca\u5929\u5be6\u4f5cARP\u548cICMP\u5c01\u5305\u89e3\u6790\u3002\u611f\u89ba\u7406\u89e3\u80fd\u529b\u9054\u5230\u4e86\u4e00\u500b\u74f6\u9838\uff0c\u61c9\u8a72\u9084\u662f\u9069\u61c9\u4e0d\u4e86\u8001\u5e2b\u90a3\u7a2e\u8df3\u8e8d\u7684\u8b1b\u89e3\u7684\u65b9\u5f0f\uff0c\u66ab\u6642\u53ea\u80fd\u7dad\u6301\u4e00\u77e5\u534a\u89e3\u7684\u72c0\u614b\u3002<\/p>\n

\u65e9\u4e0a\u4e0a\u8ab2\u7684\u6642\u5019\uff0c\u6709\u4e00\u500b\u5947\u7279\u7684\u53cd\u61c9\uff0c\u610f\u8b58\u7a81\u7136\u597d\u50cf\u505c\u96fb\u4e00\u6a23\uff0c\u5c31\u505c\u4e86\u90a3\u9ebc\u4e00\u77ac\u9593\uff0c\u7136\u5f8c\u99ac\u4e0a\u53c8\u6062\u5fa9\u904e\u4f86\u3002\u6709\u9ede\u53ef\u4ee5\u9ad4\u6703\u5230\u4e00\u500b\u4eba\u660f\u5012\u7684\u611f\u89ba\uff0c\u5927\u6982\u5c31\u662f\u90a3\u6a23\u5427\uff01\u53ea\u5dee\u5728\u6211\u5373\u6642\u6062\u5fa9\u904e\u4f86\u3002<\/p>\n

\u96d6\u7136\u6c92\u6709\u4e86\u65e5\u7cfb\u6b63\u59b9\uff0c\u4f46\u6211\u5011\u73ed\u9084\u662f\u6709\u5973\u751f\uff0c\u5176\u4e2d\u6709\u4e00\u500b\u5973\u751f\u5f88\u611b\u7b11\uff0c\u5e7e\u4e4e\u770b\u5230\u5979\u7684\u81c9\u7684\u6642\u5019\u90fd\u5728\u7b11\uff0c\u80fd\u4e00\u76f4\u9019\u9ebc\u6a02\u89c0\uff0c\u771f\u662f\u4e00\u500b\u4e0d\u932f\u7684\u72c0\u614b\u3002<\/p>\n

\u4eca\u5929\u4e0b\u8ab2\u5728\u53bb\u5750\u516c\u8eca\u7684\u9014\u4e2d\uff0c\u4e5f\u5c31\u662f\u4e2d\u5de5\u4e8c\u8857\u8def\u4e0a\uff0c\u767c\u73fe\u96fb\u7dda\u687f\u4e0a\u7adf\u7136\u7d81\u8457\u862d\u82b1\uff0c\u5c31\u9019\u6a23\u4e00\u6574\u6392\u7684\u96fb\u7dda\u687f\u90fd\u7d81\u8457\u862d\u82b1\uff0c\u800c\u4e14\u7d81\u7684\u4f4d\u7f6e\u9084\u9817\u9ad8\uff0c\u862d\u82b1\u7684\u6a23\u5b50\u770b\u8d77\u4f86\u9084\u4e0d\u932f\uff0c\u6c92\u60f3\u5230\u862d\u82b1\u4e5f\u53ef\u4ee5\u9019\u6a23\u990a\uff0c\u4f46\u7d81\u90a3\u9ebc\u9ad8\uff0c\u61c9\u8a72\u4e0d\u6703\u6709\u4eba\u7d93\u5e38\u53bb\u7d66\u5b83\u6f86\u6c34\u5427\u3002<\/p>\n

<\/p>\n

TCP<\/span>\u5354\u5b9a\u50c5\u6703\u5728\u5169\u7aef\u4e3b\u6a5f\u4e0a\u57f7\u884c\uff0c\u4e2d\u9593\u8a2d\u5099\u4e0d\u8ca0\u8cac\u7dad\u8b77\u9023\u7dda\u72c0\u614b\u3002<\/span><\/p>\n

TCP timeout<\/span>\u503c\u9700\u5927\u65bc<\/span>RRT<\/span>\u503c<\/span>(rount trip time)<\/span>\uff0c<\/span>timeout<\/span>\u592a\u5c0f\u6703\u9020\u6210\u4e0d\u5fc5\u8981\u7684\u91cd\u50b3\uff1b\u592a\u5927\uff0c\u5c0d\u65bc<\/span>segment loss<\/span>\u5075\u6e2c\u53cd\u61c9\u592a\u6162\u3002\u6709\u4e00\u500b\u63a8\u85a6\u516c\u5f0f\uff1a<\/span><\/p>\n

Timeout<\/span>\uff1d<\/span>RTT(estimated)<\/span>\uff0b<\/span>4<\/span>\u00d7<\/span>RTT(estimated)<\/span><\/p>\n

TCP<\/span>\u932f\u8aa4\u5fa9\u539f\u6a5f\u5236\u70ba<\/span>GO-BACK-N<\/span>\u548c<\/span>Selective Repeat<\/span>\u6df7\u5408\u578b\u3002<\/span><\/p>\n

Congestion(<\/span>\u81c3\u585e<\/span>)<\/span>\u70ba\u7db2\u8def\u5341\u5206\u56b4\u91cd\u7684\u554f\u984c\uff0c\u5176\u539f\u56e0\u662f\u592a\u591a\u4f86\u6e90\u7aef\u4e3b\u6a5f\u9001\u51fa\u4f86\u6e90\u8cc7\u6599\u7d66\u7db2\u8def\uff0c\u800c\u7db2\u8def\u7121\u6cd5\u8655\u7406\u3002<\/span><\/p>\n

\u4eca\u5929\u5be6\u4f5c<\/span>ARP<\/span>\u548c<\/span>ICMP<\/span>\u5c01\u5305\u89e3\u6790\u3002\u611f\u89ba\u7406\u89e3\u7684\u80fd\u529b\u9054\u5230\u4e86\u4e00\u500b\u74f6\u9838\uff0c\u61c9\u8a72\u9084\u662f\u9069\u61c9\u4e0d\u4e86\u8001\u5e2b\u8b1b\u89e3\u7684\u65b9\u5f0f\uff0c\u66ab\u6642\u53ea\u80fd\u7dad\u6301\u4e00\u77e5\u534a\u89e3\u7684\u72c0\u614b\u3002<\/span><\/p>\n

\u65e9\u4e0a\u4e0a\u8ab2\u7684\u6642\u5019\uff0c\u6709\u4e00\u500b\u5947\u7279\u7684\u53cd\u61c9\uff0c\u610f\u8b58\u7a81\u7136\u597d\u50cf\u505c\u96fb\u4e00\u6a23\uff0c\u5c31\u505c\u4e86\u90a3\u9ebc\u4e00\u77ac\u9593\uff0c\u7136\u5f8c\u99ac\u4e0a\u53c8\u6062\u5fa9\u904e\u4f86\u3002\u6709\u9ede\u53ef\u4ee5\u9ad4\u6703\u5230\u4e00\u500b\u4eba\u660f\u5012\u7684\u611f\u89ba\uff0c\u5927\u6982\u5c31\u662f\u90a3\u6a23\u5427\uff01\u53ea\u5dee\u5728\u6211\u5373\u6642\u6062\u5fa9\u904e\u4f86\u3002<\/span><\/p>\n

\u6211\u5011\u73ed\u6709\u4e00\u500b\u5973\u751f\u5f88\u611b\u7b11\uff0c\u5e7e\u4e4e\u770b\u5230\u5979\u7684\u81c9\u7684\u6642\u5019\u90fd\u5728\u7b11\uff0c\u80fd\u4e00\u76f4\u9019\u9ebc\u6a02\u89c0\uff0c\u771f\u662f\u4e00\u500b\u4e0d\u932f\u7684\u72c0\u614b\u3002<\/span><\/p>\n

\u4eca\u5929\u4e0b\u8ab2\u5728\u53bb\u5750\u516c\u8eca\u7684\u9014\u4e2d\uff0c\u4e5f\u5c31\u662f\u4e2d\u5de5\u4e8c\u8857\u8def\u4e0a\uff0c\u767c\u73fe\u96fb\u7dda\u687f\u4e0a\u7adf\u7136\u7d81\u8457\u862d\u82b1\uff0c\u5c31\u9019\u6a23\u4e00\u6574\u6392\u7684\u96fb\u7dda\u687f\u90fd\u7d81\u8457\u862d\u82b1\uff0c\u800c\u4e14\u7d81\u7684\u4f4d\u7f6e\u9084\u9817\u9ad8\uff0c\u862d\u82b1\u7684\u6a23\u5b50\u770b\u8d77\u4f86\u9084\u4e0d\u932f\uff0c\u6c92\u60f3\u5230\u862d\u82b1\u4e5f\u53ef\u4ee5\u9019\u6a23\u990a\uff0c\u4f46\u7d81\u90a3\u9ebc\u9ad8\uff0c\u61c9\u8a72\u4e0d\u6703\u6709\u4eba\u7d93\u5e38\u53bb\u7d66\u5b83\u6f86\u6c34\u5427\u3002<\/span><\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

\u4e16\u8cbf\u7db2\u5de5\u73ed\u7b2c\u5341\u4e00\u5929\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[12],"tags":[139],"class_list":["post-1904","post","type-post","status-publish","format-standard","hentry","category-freetalking","tag-139"],"_links":{"self":[{"href":"https:\/\/wp.chunhsin.idv.tw\/index.php?rest_route=\/wp\/v2\/posts\/1904","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wp.chunhsin.idv.tw\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/wp.chunhsin.idv.tw\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/wp.chunhsin.idv.tw\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/wp.chunhsin.idv.tw\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1904"}],"version-history":[{"count":3,"href":"https:\/\/wp.chunhsin.idv.tw\/index.php?rest_route=\/wp\/v2\/posts\/1904\/revisions"}],"predecessor-version":[{"id":1907,"href":"https:\/\/wp.chunhsin.idv.tw\/index.php?rest_route=\/wp\/v2\/posts\/1904\/revisions\/1907"}],"wp:attachment":[{"href":"https:\/\/wp.chunhsin.idv.tw\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1904"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wp.chunhsin.idv.tw\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1904"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wp.chunhsin.idv.tw\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1904"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}