{"id":873,"date":"2008-01-13T15:14:42","date_gmt":"2008-01-13T15:14:42","guid":{"rendered":"http:\/\/localhost\/?p=51"},"modified":"2008-01-13T15:14:42","modified_gmt":"2008-01-13T15:14:42","slug":"osi-7-layer-7-2","status":"publish","type":"post","link":"https:\/\/wrestler.idv.tw\/wp\/archives\/873","title":{"rendered":"\u4ec0\u9ebc\u662fOSI\u76847\u5c64\u67b6\u69cb\uff1f\u548c\u5e38\u807d\u5230\u7684Layer 7\u6709\u95dc\uff1f"},"content":{"rendered":"<table border=\"0\" cellpadding=\"0\" cellspacing=\"0\" class=\"Bpadd\" width=\"100%\">\n<tbody>\n<tr>\n<td class=\"text20\">\u4ec0\u9ebc\u662fOSI\u76847\u5c64\u67b6\u69cb\uff1f\u548c\u5e38\u807d\u5230\u7684Layer 7\u6709\u95dc\uff1f <\/td>\n<\/tr>\n<tr>\n<td align=\"right\" class=\"text12\">\n<p>\n\t\t\t<span class=\"text12\" style=\"color: #6f6f6f\">\u6587\/<a href=\"http:\/\/www.oudou.why3s.us\/\" title=\"http:\/\/www.oudou.why3s.us\/\">\u6797\u90c1\u7fd4<\/a> 2008-01-13<\/span>\n\t\t\t<\/p>\n<p>\n\t\t\t<span class=\"text12\" style=\"color: #6f6f6f\">[@more@]&nbsp;<\/p>\n<p>\t\t\t<\/span>\n\t\t\t<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td class=\"text13b\">OSI\u6a21\u578b\u662f\u4e00\u7a2e\u5236\u5b9a\u7db2\u8def\u6a19\u6e96\u90fd\u6703\u53c3\u8003\u7684\u6982\u5ff5\u6027\u67b6\u69cb\uff0c\u4f9d\u64da\u7db2\u8def\u904b\u4f5c\u65b9\u5f0f\uff0cOSI\u6a21\u578b\u5171\u5207\u5206\u62107\u500b\u4e0d\u540c\u7684\u5c64\u7d1a\uff0c\u6bcf\u7d1a\u6309\u7167\u7db2\u8def\u50b3\u8f38\u7684\u6a21\u5f0f\uff0c\u5b9a\u7fa9\u6240\u5c6c\u7684\u898f\u7bc4\u53ca\u6a19\u6e96\u3002 <\/p>\n<\/td>\n<\/tr>\n<tr>\n<td class=\"text20\"><\/td>\n<\/tr>\n<tr>\n<td class=\"text15\">\u6240\u8b02\u7684OSI\uff0c\u662f\u7531\u570b\u969b\u5316\u6a19\u6e96\u7d44\u7e54\uff08ISO\uff09\u91dd\u5c0d\u958b\u653e\u5f0f\u7db2\u8def\u67b6\u69cb\u6240\u5236\u5b9a\u7684\u96fb\u8166\u4e92\u9023\u6a19\u6e96\uff0c\u5168\u540d\u662f\u958b\u653e\u5f0f\u901a\u8a0a\u7cfb\u7d71\u4e92\u9023\u53c3\u8003\u6a21\u578b\uff08Open System Interconnection Reference Model\uff09\uff0c\u7c21\u7a31OSI\u6a21\u578b\u3002\u8a72\u6a21\u578b\u662f\u4e00\u7a2e\u5236\u5b9a\u7db2\u8def\u6a19\u6e96\u90fd\u6703\u53c3\u8003\u7684\u6982\u5ff5\u6027\u67b6\u69cb\uff0c\u4e26\u975e\u4e00\u5957\u6a19\u6e96\u898f\u7bc4\uff0c\u4e5f\u4e0d\u662f\u7528\u4f86\u63d0\u4f9b\u5be6\u73fe\u7684\u65b9\u6cd5\uff0c\u800c\u662f\u900f\u904e\u89c0\u5ff5\u63cf\u8ff0\uff0c\u5354\u8abf\u5404\u7a2e\u7db2\u8def\u529f\u80fd\u767c\u5c55\u6642\u7684\u6a19\u6e96\u5236\u5b9a\u3002 <\/p>\n<p>\t\t\t\u4f9d\u64da\u7db2\u8def\u904b\u4f5c\u65b9\u5f0f\uff0cOSI\u6a21\u578b\u5171\u5207\u5206\u62107\u500b\u4e0d\u540c\u7684\u5c64\u7d1a\uff0c\u6bcf\u7d1a\u6309\u7167\u7db2\u8def\u50b3\u8f38\u7684\u6a21\u5f0f\uff0c\u5b9a\u7fa9\u6240\u5c6c\u7684\u898f\u7bc4\u53ca\u6a19\u6e96\u3002\u7531\u5177\u9ad4\u5230\u62bd\u8c61\u7684\u7db2\u8def\u50b3\u8f38\u65b9\u5f0f\u5c64\u6b21\u4f86\u770b\uff0c7\u5c64\u5206\u5225\u70ba\u5be6\u9ad4\u5c64\u3001\u8cc7\u6599\u9023\u7d50\u5c64\u3001\u7db2\u8def\u5c64\u3001\u50b3\u8f38\u5c64\u3001\u6703\u8b70\u5c64\u3001\u5c55\u793a\u5c64\u53ca\u61c9\u7528\u5c64\u3002 <\/p>\n<p>\t\t\tOSI\u6a21\u578b\u7684\u597d\u8655\u5728\u65bc\uff0c\u5b83\u7d30\u5206\u6bcf\u500b\u529f\u80fd\uff0c\u5728\u767c\u5c55\u7db2\u8def\u529f\u80fd\u53ca\u6559\u80b2\u8a13\u7df4\u4e0a\u6709\u5f88\u5927\u7684\u5e6b\u52a9\u3002\u7522\u54c1\u958b\u767c\u6642\uff0c\u53ea\u8981\u4f9d\u64da\u5404\u500b\u5c64\u7d1a\u898f\u7bc4\uff0c\u5c08\u6ce8\u767c\u5c55\u5373\u53ef\uff1b\u5728\u6559\u5b78\u6642\uff0c\u900f\u904eOSI\u6a21\u578b\u89e3\u91cb\u7db2\u8def\u904b\u4f5c\u7684\u67b6\u69cb\uff0c\u4e5f\u8f03\u5bb9\u6613\u8b93\u521d\u5b78\u8005\u4e86\u89e3\u3002\u4f46\u662f\u67d0\u4e9b\u5c64\u7d1a\u7684\u529f\u80fd\u4ecd\u4e0d\u6613\u638c\u63e1\uff0c\u50cf\u662f\u6703\u8b70\u5c64\u53ca\u5c55\u793a\u5c64\u3002\u76f8\u8f03\u65bc\u7db2\u8def\u5c64\u6216\u61c9\u7528\u5c64\uff0c\u5b83\u5011\u898f\u7bc4\u7684\u6a19\u6e96\u82e5\u6709\u4f3c\u7121\uff0c\u5be6\u969b\u4e0a\u7684\u61c9\u7528\u4e5f\u4e0d\u591a\u898b\u3002 <\/p>\n<p>\t\t\t<strong>\u7b2c\u4e00\u5c64\ufe30\u5be6\u9ad4\u5c64\uff08Physical Layer\uff09<\/strong> <br \/>\n\t\t\t\u5be6\u9ad4\u5c64\u662fOSI\u6a21\u578b\u7684\u6700\u5e95\u5c64\uff0c\u5b83\u7528\u4f86\u5b9a\u7fa9\u7db2\u8def\u88dd\u7f6e\u4e4b\u9593\u7684\u4f4d\u5143\u8cc7\u6599\u50b3\u8f38\uff0c\u4e5f\u5c31\u662f\u5728\u96fb\u7dda\u6216\u5176\u4ed6\u7269\u7406\u7dda\u6750\u4e0a\uff0c\u50b3\u905e0\u82071\u96fb\u5b50\u8a0a\u865f\uff0c\u5f62\u6210\u7db2\u8def\u3002\u5be6\u9ad4\u5c64\u898f\u7bc4\u7684\u5167\u5bb9\u5305\u542b\u4e86\u7e9c\u7dda\u7684\u898f\u683c\u3001\u50b3\u8f38\u901f\u5ea6\uff0c\u4ee5\u53ca\u8cc7\u6599\u50b3\u8f38\u7684\u96fb\u58d3\u503c\uff0c\u7528\u4f86\u78ba\u4fdd\u8a0a\u865f\u53ef\u4ee5\u5728\u591a\u7a2e\u7269\u7406\u5a92\u4ecb\u4e0a\u50b3\u8f38\u3002 <\/p>\n<p>\t\t\t\u7db2\u8def\u7dda\u3001\u7db2\u8def\u5361\u8207\u96c6\u7dda\u5668\uff08Hub\uff09\uff0c\u90fd\u662f\u5e73\u5e38\u5bb9\u6613\u63a5\u89f8\u5230\u7684\u5be6\u9ad4\u5c64\u8a2d\u5099\u3002\u7db2\u8def\u7dda\u5305\u62ec\u8fa6\u516c\u5ba4\u53ca\u6a5f\u623f\u5167\u5e38\u898b\u7684RJ-45 UTP\u96d9\u7d5e\u7dda\u3001\u6709\u7dda\u96fb\u8996\u4f7f\u7528\u7684\u540c\u8ef8\u96fb\u7e9c\uff0c\u4ee5\u53ca\u61c9\u7528\u5728\u9aa8\u5e79\u7db2\u8def\u7684\u5149\u7e96\u7e9c\u7dda\u7b49\u3002\u4e0d\u904e\uff0c\u5c0d\u7121\u7dda\u7db2\u8def\u800c\u8a00\uff0c\u53ea\u8981\u53ef\u4ee5\u50b3\u8f38\u96fb\u6ce2\u7684\u4ecb\u8cea\uff0c\u90fd\u5c6c\u65bc\u5b83\u7684\u50b3\u8f38\u5a92\u4ecb\u3002 <\/p>\n<p>\t\t\t\u96c6\u7dda\u5668\u6307\u7684\u662f\u55ae\u7d14\u4e32\u63a5\u7dda\u8def\uff0c\u518d\u4ee5\u5ee3\u64ad\u65b9\u5f0f\u50b3\u8f38\u8cc7\u6599\u7684\u8a2d\u5099\u3002\u5e02\u9762\u4e0a\u6240\u898b\u7684\u8907\u5408\u5f0f\u96c6\u7dda\u5668\u8a2d\u5099\uff0c\u4f8b\u5982Switching Hub\uff08\u4ea4\u63db\u5f0f\u96c6\u7dda\u5668\uff09\uff0c\u662f\u5ee0\u5546\u4f9d\u7167\u5e02\u5834\u9700\u6c42\u6240\u958b\u767c\u7684\u7522\u54c1\uff0c\u901a\u5e38\u5305\u542b\u4e9b\u8a31\u8cc7\u6599\u9023\u7d50\u5c64\u7684\u529f\u80fd\uff0c\u5c31OSI\u7684\u898f\u7bc4\u4f86\u8aaa\uff0c\u5b83\u4e26\u4e0d\u5b8c\u5168\u662f\u4e00\u500b\u96c6\u7dda\u5668\u3002 <\/p>\n<p>\t\t\t<strong>\u7b2c\u4e8c\u5c64\ufe30\u8cc7\u6599\u9023\u7d50\u5c64\uff08Data Link Layer\uff09<\/strong> <br \/>\n\t\t\t\u8cc7\u6599\u9023\u7d50\u5c64\u4ecb\u65bc\u5be6\u9ad4\u5c64\u8207\u7db2\u8def\u5c64\u4e4b\u9593\uff0c\u4e3b\u8981\u662f\u5728\u7db2\u8def\u4e4b\u9593\u5efa\u7acb\u908f\u8f2f\u9023\u7d50\uff0c\u4e26\u4e14\u5728\u50b3\u8f38\u904e\u7a0b\u4e2d\u8655\u7406\u6d41\u91cf\u63a7\u5236\u53ca\u932f\u8aa4\u5075\u6e2c\uff0c\u8b93\u8cc7\u6599\u50b3\u9001\u8207\u63a5\u6536\u66f4\u7a69\u5b9a\u3002\u8cc7\u6599\u9023\u7d50\u5c64\u5c07\u5be6\u9ad4\u5c64\u7684\u6578\u4f4d\u8a0a\u865f\u5c01\u88dd\u6210\u4e00\u7d44\u7b26\u5408\u908f\u8f2f\u50b3\u8f38\u8cc7\u6599\uff0c\u9019\u7d44\u8a0a\u865f\u7a31\u70ba\u8cc7\u6599\u8a0a\u6846\uff08Data Frame\uff09\u3002\u8a0a\u6846\u5167\u5305\u542b\u5a92\u9ad4\u5b58\u53d6\u63a7\u5236\uff08Media Access Control\uff0cMAC\uff09\u4f4d\u5740\u3002\u800c\u8cc7\u6599\u5728\u50b3\u8f38\u6642\uff0c\u9019\u9805\u4f4d\u5740\u8cc7\u8a0a\u53ef\u8b93\u5c0d\u65b9\u4e3b\u6a5f\u8fa8\u8b58\u8cc7\u6599\u4f86\u6e90\u3002MAC\u4f4d\u5740\u662f\u4e00\u7d44\u5e8f\u865f\uff0c\u6bcf\u500b\u7db2\u8def\u8a2d\u5099\u7684MAC\u4f4d\u5740\u90fd\u662f\u7368\u4e00\u7121\u4e8c\u7684\uff0c\u53ef\u4ee5\u8b93\u7db2\u8def\u8a2d\u5099\u5728\u5340\u57df\u7db2\u8def\u6e9d\u901a\u6642\u5f7c\u6b64\u8b58\u5225\uff0c\u4f8b\u5982\u7db2\u8def\u5361\u5c31\u662f\u660e\u986f\u7684\u4f8b\u5b50\u3002 <\/p>\n<p>\t\t\t\u4e0d\u5c11\u7db2\u8def\u5354\u5b9a\u662f\u5728\u8cc7\u6599\u9023\u7d50\u5c64\u4e0a\u904b\u4f5c\uff0c\u6211\u5011\u8f03\u5e38\u807d\u5230\u7684\u662f\u975e\u540c\u6b65\u50b3\u8f38\u6a21\u5f0f\uff08Asynchronous Transfer Mode\uff0cATM\uff09\uff0c\u4ee5\u53ca\u9ede\u5c0d\u9ede\u5354\u5b9a\uff08Point-to-Point Protocol\uff0cPPP\uff09\u3002\u524d\u8005\u662f\u65e9\u671f\u7db2\u8def\u767c\u5c55\u7684\u901a\u8a0a\u5354\u5b9a\uff0c\u7531\u65bc\u55ae\u6b21\u50b3\u8f38\u91cf\u5f88\u5c0f\uff0c\u9069\u5408\u7528\u4f5c\u8a9e\u97f3\u50b3\u8f38\uff1b\u5f8c\u8005\u5247\u662f\u5728\u6211\u5011\u4f7f\u7528ADSL\u6642\uff0c\u6703\u900f\u904e\u9019\u9805\u5354\u5b9a\u9023\u63a5ISP\uff0c\u5f9e\u800c\u9023\u4e0a\u7db2\u969b\u7db2\u8def\u3002 <\/p>\n<p>\t\t\t\u7db2\u8def\u4ea4\u63db\u5668\uff08Switch\uff09\u662f\u9019\u500b\u5c64\u7d1a\u5e38\u898b\u7684\u8a2d\u5099\uff0c\u4e3b\u8981\u5728\u5340\u57df\u7db2\u8def\u4e0a\u904b\u4f5c\uff0c\u80fd\u4f9d\u64daMAC\u4f4d\u5740\uff0c\u5c07\u7db2\u8def\u8cc7\u6599\u50b3\u9001\u5230\u76ee\u7684\u4e3b\u6a5f\u4e0a\u3002\u4ea4\u63db\u5668\u4e00\u822c\u5206\u70ba\u53ef\u8a2d\u5b9a\u5f0f\u8207\u514d\u8a2d\u5b9a\u5169\u7a2e\uff0c\u524d\u8005\u53ef\u4ee5\u8a2d\u5b9a\u6d41\u91cf\u63a7\u5236\u6216\u8a2d\u5b9a\u5b50\u7db2\u8def\u5206\u5272\uff0c\u5f8c\u8005\u50c5\u50b3\u8f38\u7db2\u8def\u8cc7\u6599\uff0c\u4e0d\u5177\u5176\u4ed6\u9032\u968e\u529f\u80fd\u3002 <\/p>\n<p>\t\t\t<strong>\u7b2c\u4e09\u5c64\ufe30\u7db2\u8def\u5c64\uff08Network Layer\uff09<\/strong> <br \/>\n\t\t\t\u7db2\u8def\u5c64\u5b9a\u7fa9\u7db2\u8def\u8def\u7531\u53ca\u5b9a\u5740\u529f\u80fd\uff0c\u8b93\u8cc7\u6599\u80fd\u5920\u5728\u7db2\u8def\u9593\u50b3\u905e\u3002\u9019\u4e00\u5c64\u4e2d\u6700\u4e3b\u8981\u7684\u901a\u8a0a\u5354\u5b9a\u662f\u7db2\u969b\u7db2\u8def\u5354\u5b9a\uff08Internet Protocol\uff0cIP\uff09\uff0c\u8cc7\u6599\u5728\u50b3\u8f38\u6642\uff0c\u8a72\u5354\u5b9a\u5c07IP\u4f4d\u5740\u52a0\u5165\u50b3\u8f38\u8cc7\u6599\u5167\uff0c\u4e26\u628a\u8cc7\u6599\u7d44\u6210\u5c01\u5305\uff08Packet\uff09\u3002\u5728\u7db2\u8def\u4e0a\u50b3\u8f38\u6642\uff0c\u5c01\u5305\u88e1\u9762\u7684IP\u4f4d\u5740\u6703\u544a\u8a34\u7db2\u8def\u8a2d\u5099\u9019\u7b46\u8cc7\u6599\u7684\u4f86\u6e90\u53ca\u76ee\u7684\u5730\u3002\u7531\u65bc\u7db2\u8def\u5c64\u4e3b\u8981\u4ee5IP\u904b\u4f5c\u70ba\u4e3b\uff0c\u6545\u53c8\u7a31\u70ba\u300cIP\u5c64\u300d\u3002\u9664\u4e86IP\uff0c\u5728\u7db2\u8def\u5c64\u4e0a\u904b\u4f5c\u7684\u5354\u5b9a\u9084\u5305\u542bIPX\u53caX.25\u3002 <\/p>\n<p>\t\t\t\u8def\u7531\u5668\u53caLayer 3\u4ea4\u63db\u5668\u5373\u5c6c\u65bc\u7b2c\u4e09\u5c64\u7684\u7db2\u8def\u8a2d\u5099\uff0c\u4e3b\u8981\u4ee5IP\u4f5c\u70ba\u8cc7\u6599\u50b3\u8f38\u4f9d\u64da\uff0c\u5b83\u5011\u5927\u591a\u5728\u4f01\u696d\u6a5f\u623f\u5167\u904b\u4f5c\uff0c\u4e0d\u904e\u6211\u5011\u4e5f\u5e38\u770b\u5230\u6709\u4e9b\u8a2d\u5099\u4e5f\u540c\u6642\u5305\u542b\u7db2\u8def\u5c64\u529f\u80fd\uff0c\u5982IP\u5206\u4eab\u5668\uff0c\u4ee5\u53ca\u4fd7\u7a31\u5c0f\u70cf\u9f9c\u7684ADSL\u7528\u6236\u7d42\u7aef\u8a2d\u5099\uff08ADSL Terminal Unit-Remote\uff0cATU-R\uff09\u3002 <\/p>\n<p>\t\t\t<strong>\u7b2c\u56db\u5c64\ufe30\u50b3\u8f38\u5c64\uff08Transport Layer\uff09<\/strong> <br \/>\n\t\t\t\u50b3\u8f38\u5c64\u4e3b\u8981\u8ca0\u8cac\u96fb\u8166\u6574\u9ad4\u7684\u8cc7\u6599\u50b3\u8f38\u53ca\u63a7\u5236\uff0c\u662fOSI\u6a21\u578b\u4e2d\u7684\u95dc\u9375\u89d2\u8272\uff0c\u5b83\u53ef\u4ee5\u5c07\u4e00\u500b\u8f03\u5927\u7684\u8cc7\u6599\u5207\u5272\u6210\u591a\u500b\u9069\u5408\u50b3\u8f38\u7684\u8cc7\u6599\uff0c\u66ff\u6a21\u578b\u9802\u7aef\u7684\u7b2c\u4e94\u3001\u516d\u3001\u4e03\u7b49\u4e09\u500b\u901a\u8a0a\u5c64\u63d0\u4f9b\u6d41\u91cf\u7ba1\u5236\u53ca\u932f\u8aa4\u63a7\u5236\u3002 <\/p>\n<p>\t\t\t\u50b3\u8f38\u63a7\u5236\u5354\u5b9a\uff08Transmission Control 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