\u7f51\u6865\u57fa\u7840\u77e5\u8bc6\u4ecb\u7ecd <\/p>\n
\u4e00\u3001\u4ec0\u4e48\u662f\u7f51\u6865\uff1f <\/p>\n
\u7f51\u6865\u5de5\u4f5c\u5728\u6570\u636e\u94fe\u8def\u5c42\uff0c\u5c06\u4e24\u4e2aLAN\u8fde\u8d77\u6765\uff0c\u6839\u636eMAC\u5730\u5740\u6765\u8f6c\u53d1\u5e27\uff0c\u53ef\u4ee5\u770b\u4f5c\u4e00\u4e2a\u201c\u4f4e\u5c42\u7684\u8def\u7531\u5668\u201d\uff08\u8def\u7531\u5668\u5de5\u4f5c\u5728\u7f51\u7edc\u5c42\uff0c\u6839\u636e\u7f51\u7edc\u5730\u5740\u5982IP\u5730\u5740\u8fdb\u884c\u8f6c\u53d1\uff09\u3002 <\/p>\n
\u8fdc\u7a0b\u7f51\u6865\u901a\u8fc7\u4e00\u4e2a\u901a\u5e38\u8f83\u6162\u7684\u94fe\u8def\uff08\u5982\u7535\u8bdd\u7ebf\uff09\u8fde\u63a5\u4e24\u4e2a\u8fdc\u7a0bLAN\uff0c\u5bf9\u672c\u5730\u7f51\u6865\u800c\u8a00\uff0c\u6027\u80fd\u6bd4\u8f83\u91cd\u8981\uff0c\u800c\u5bf9\u8fdc\u7a0b\u7f51\u6865\u800c\u8a00\uff0c\u5728\u957f\u8ddd\u79bb\u4e0a\u53ef\u6b63\u5e38\u8fd0\u884c\u662f\u66f4\u91cd\u8981\u7684\u3002 <\/p>\n
\u7f51\u6865\u4e0e\u8def
\u7531\u5668\u7684\u6bd4\u8f83 <\/p>\n
\u7f51\u6865\u5e76\u4e0d\u4e86\u89e3\u5176\u8f6c\u53d1\u5e27\u4e2d\u9ad8\u5c42\u534f\u8bae\u7684\u4fe1\u606f\uff0c\u8fd9\u4f7f\u5b83\u53ef\u4ee5\u540c\u65f6\u4ee5\u540c\u79cd\u51e1\u662f\u5904\u7406IP\u3001IPX\u7b49\u534f\u8bae\uff0c\u5b83\u8fd8\u63d0\u4f9b\u4e86\u5c06\u65e0\u8def\u7531\u534f\u8bae\u7684\u7f51\u7edc\uff08\u5982NetBEUI\uff09\u5206\u6bb5\u7684\u529f\u80fd\u3002 <\/p>\n
\u7531\u4e8e\u8def\u7531\u5668\u5904\u7406\u7f51\u7edc\u5c42\u7684\u6570\u636e\uff0c\u56e0\u6b64\u5b83\u4eec\u66f4\u5bb9\u6613\u4e92\u8fde\u4e0d\u540c\u7684\u6570\u636e\u94fe\u8def\u5c42\uff0c\u5982\u4ee4\u724c\u73af\u7f51\u6bb5\u548c\u4ee5\u592a\u7f51\u6bb5\u3002\u7f51\u6865\u901a\u5e38\u6bd4\u8def\u7531\u5668\u96be\u63a7\u5236\u3002\u8c61IP\u7b49\u534f\u8bae\u6709\u590d\u6742\u7684\u8def\u7531\u534f\u8bae\uff0c\u4f7f\u7f51\u7ba1\u6613\u4e8e\u7ba1\u7406\u8def\u7531\uff1bIP\u7b49\u534f\u8bae\u8fd8\u63d0\u4f9b\u4e86\u8f83\u591a\u7684\u7f51\u7edc\u5982\u4f55\u5206\u6bb5\u7684\u4fe1\u606f\uff08\u5373\u4f7f\u5176\u5730\u5740\u4e5f\u63d0\u4f9b\u4e86\u6b64\u7c7b\u4fe1\u606f\uff09\u3002\u800c\u7f51\u6865\u5219\u53ea\u7528MAC\u5730\u5740\u548c\u7269\u7406\u62d3\u6251\u8fdb\u884c\u5de5\u4f5c\u3002\u56e0\u6b64\u7f51\u6865\u4e00\u822c\u9002\u4e8e\u5c0f\u578b\u8f83\u7b80\u5355\u7684\u7f51\u7edc\u3002 <\/p>\n
\u4e8c\u3001\u4f7f\u7528\u539f\u56e0 <\/p>\n
\u8bb8\u591a\u5355\u4f4d\u90fd\u6709\u591a\u4e2a\u5c40\u57df\u7f51\uff0c\u5e76\u4e14\u5e0c\u671b\u80fd\u591f\u5c06\u5b83\u4eec\u8fde\u63a5\u8d77\u6765\u3002\u4e4b\u6240\u4ee5\u4e00\u4e2a\u5355\u4f4d\u6709\u591a\u4e2a\u5c40\u57df\u7f51\uff0c\u6709\u4ee5\u4e0b6\u4e2a\u539f\u56e0\uff1a <\/p>\n
\u9996\u5148\uff0c\u8bb8\u591a\u5927\u5b66\u7684\u7cfb\u6216\u516c\u53f8\u7684\u90e8\u95e8\u90fd\u6709\u5404\u81ea\u7684\u5c40\u57df\u7f51\uff0c\u4e3b\u8981\u7528\u4e8e\u8fde\u63a5\u4ed6\u4eec\u81ea\u5df1\u7684\u4e2a\u4eba\u8ba1\u7b97\u673a\u3001\u5de5\u4f5c\u7ad9\u4ee5\u53ca\u670d\u52a1\u5668\u3002\u7531\u4e8e\u5404\u7cfb\uff08\u6216\u90e8\u95e8\uff09\u7684\u5de5\u4f5c\u6027\u8d28\u4e0d\u540c\uff0c\u56e0\u6b64\u9009\u7528\u4e86\u4e0d\u540c\u7684\u5c40\u57df\u7f51\uff0c\u8fd9\u4e9b\u7cfb\uff08\u6216\u90e8\u95e8\uff09\u4e4b\u95f4\u65e9\u665a\u9700\u76f8\u4e92\u4ea4\u5f80\uff0c\u56e0\u800c\u9700\u8981\u7f51\u6865\u3002 <\/p>\n
\u5176\u6b21\uff0c\u4e00\u4e2a\u5355\u4f4d\u5728\u5730\u7406\u4f4d\u7f6e\u4e0a\u8f83\u5206\u6563\uff0c\u5e76\u4e14\u76f8\u8ddd\u8f83\u8fdc\uff0c\u4e0e\u5176\u5b89\u88c5\u4e00\u4e2a\u904d\u5e03\u6240\u6709\u5730\u70b9\u7684\u540c\u8f74\u7535\u7f06\u7f51\uff0c\u4e0d\u5982\u5728\u5404\u4e2a\u5730\u70b9\u5efa\u7acb\u4e00\u4e2a\u5c40\u57df\u7f51\uff0c\u5e76\u7528\u7f51\u6865\u548c\u7ea2\u5916\u94fe\u8def\u8fde\u63a5\u8d77\u6765\uff0c\u8fd9\u6837\u8d39\u7528\u53ef\u80fd\u4f1a\u4f4e\u4e00\u4e9b\u3002 <\/p>\n
\u7b2c3\uff0c\u53ef\u80fd\u6709\u5fc5\u8981\u5c06\u4e00\u4e2a\u903b\u8f91\u4e0a\u5355\u4e00\u7684LAN\u5206\u6210\u591a\u4e2a\u5c40\u57df\u7f51\uff0c\u4ee5\u8c03\u8282\u8f7d\u8377\u3002\u4f8b\u5982\u91c7\u7528\u7531\u7f51\u6865\u8fde\u63a5\u7684\u591a\u4e2a\u5c40\u57df\u7f51\uff0c\u6bcf\u4e2a\u5c40\u57df\u7f51\u6709\u4e00\u7ec4\u5de5\u4f5c\u7ad9\uff0c\u5e76\u4e14\u6709\u81ea\u5df1\u7684\u6587\u4ef6\u670d\u52a1\u5668\uff0c\u56e0\u6b64\u5927\u90e8\u5206\u901a\u4fe1\u9650\u4e8e\u5355\u4e2a\u5c40\u57df\u7f51\u5185\uff0c\u51cf\u8f7b\u4e86\u4e3b\u5e72\u7f51\u7684\u8d1f\u62c5\u3002 <\/p>\n
\u7b2c4\uff0c\u5728\u6709\u4e9b\u60c5\u51b5\u4e0b\uff0c\u4ece\u8f7d\u8377\u4e0a\u770b\u5355\u4e2a\u5c40\u57df\u7f51\u662f\u6beb\u65e0\u95ee\u9898\u7684\uff0c\u4f46\u662f\u76f8\u8ddd\u6700\u8fdc\u7684\u673a\u5668\u4e4b\u95f4\u7684\u7269\u7406\u8ddd\u79bb\u592a\u8fdc\uff08\u6bd4\u5982\u8d85\u8fc7802.3\u6240\u89c4\u5b9a\u76842.5km\uff09\u3002\u5373\u4f7f\u7535\u7f06\u94fa\u8bbe\u4e0d\u6210\u95ee\u9898\uff0c\u4f46\u7531\u4e8e\u6765\u56de\u65f6\u5ef6\u8fc7\u957f\uff0c\u7f51\u7edc\u4ecd\u5c06\u4e0d\u80fd\u6b63\u5e38\u5de5\u4f5c\u3002\u552f\u4e00\u7684\u529e\u6cd5\u662f\u5c06\u5c40\u57df\u7f51\u5206\u6bb5\uff0c\u5728\u5404\u6bb5\u4e4b\u95f4\u653e\u7f6e\u7f51\u6865\u3002\u901a\u8fc7\u4f7f\u7528\u7f51\u6865\uff0c\u53ef\u4ee5\u589e\u52a0\u5de5\u4f5c\u7684\u603b\u7269\u7406\u8ddd\u79bb\u3002 <\/p>\n
\u7b2c5\uff0c\u53ef\u9760\u6027\u95ee\u9898\u3002\u5728\u4e00\u4e2a\u5355\u72ec\u7684\u5c40\u57df\u7f51\u4e2d\uff0c\u4e00\u4e2a\u6709\u7f3a\u9677\u7684\u8282\u70b9\u4e0d\u65ad\u5730\u8f93\u51fa\u65e0\u7528\u7684\u4fe1\u606f\u6d41\u4f1a\u4e25\u91cd\u5730\u7834\u574f\u5c40\u57df\u7f51\u7684\u8fd0\u884c\u3002\u7f51\u6865\u53ef\u4ee5\u8bbe\u7f6e\u5728\u5c40\u57df\u7f51\u4e2d\u7684\u5173\u952e\u90e8\u4f4d\uff0c\u5c31\u50cf\u5efa\u7b51\u7269\u5185\u7684\u653e\u706b\u95e8\u4e00\u6837\uff0c\u9632\u6b62\u56e0\u5355\u4e2a\u8282\u70b9\u5931\u5e38\u800c\u7834\u574f\u6574\u4e2a\u7cfb\u7edf\u3002 <\/p>\n
\u7b2c6\uff0c\u7f51\u6865\u6709\u52a9\u4e8e\u5b89\u5168\u4fdd\u5bc6\u3002\u5927\u591a\u6570LAN\u63a5\u53e3\u90fd\u6709\u4e00\u79cd\u6df7\u6742\u5de5\u4f5c\u65b9\u5f0f(promiscuous mode)\uff0c\u5728\u8fd9\u79cd\u65b9\u5f0f\u4e0b\uff0c\u8ba1\u7b97\u673a\u63a5\u6536\u6240\u6709\u7684\u5e27\uff0c\u5305\u62ec\u90a3\u4e9b\u5e76\u4e0d\u662f\u7f16\u5740\u53d1\u9001\u7ed9\u5b83\u7684\u5e27\u3002\u5982\u679c\u7f51\u4e2d\u591a\u5904\u8bbe\u7f6e\u7f51\u6865\u5e76\u8c28\u614e\u5730\u62e6\u622a\u65e0\u987b\u8f6c\u53d1\u7684\u91cd\u8981\u4fe1\u606f\uff0c\u90a3\u4e48\u5c31\u53ef\u4ee5\u628a\u7f51\u7edc\u5206\u9694\u4ee5\u9632\u6b62\u4fe1\u606f\u88ab\u7a83\u3002 <\/p>\n
\u4e09\u3001\u517c\u5bb9\u6027\u95ee\u9898 <\/p>\n
\u6709\u4eba\u53ef\u80fd\u4f1a\u5929\u771f\u5730\u8ba4\u4e3a\u4ece\u4e00\u4e2a802\u5c40\u57df\u7f51\u5230\u53e6\u4e00\u4e2a802\u5c40\u57df\u7f51\u7684\u7f51\u6865\u975e\u5e38\u7b80\u5355\uff0c\u4f46\u5b9e\u9645\u4e0a\u5e76\u975e\u5982\u6b64\u3002\u5728802.x\u5230802.y\u7684\u4e5d\u79cd\u7ec4\u5408\u4e2d\uff0c\u6bcf\u4e00\u79cd\u90fd\u6709\u5b83\u81ea\u5df1\u7684\u7279\u6b8a\u95ee\u9898\u8981\u89e3\u51b3\u3002\u5728\u8ba8\u8bba\u8fd9\u4e9b\u7279\u6b8a\u95ee\u9898\u4e4b\u524d\uff0c\u5148\u6765\u770b\u4e00\u770b\u8fd9\u4e9b\u7f51\u6865\u5171\u540c\u9762\u4e34\u7684\u4e00\u822c\u6027\u95ee\u9898\u3002 <\/p>\n
\u9996\u5148\uff0c\u5404\u79cd\u5c40\u57df\u7f51\u91c7\u7528\u4e86\u4e0d\u540c\u7684\u5e27\u683c\u5f0f\u3002\u8fd9\u79cd\u4e0d\u517c\u5bb9\u6027\u5e76\u4e0d\u662f\u7531\u6280\u672f\u4e0a\u7684\u539f\u56e0\u9020\u6210\u7684\uff0c\u800c\u4ec5\u4ec5\u662f\u7531\u4e8e\u652f\u6301\u4e09\u79cd\u6807\u51c6\u7684\u516c\u53f8(Xerox, GM\u548cIBM)\uff0c\u6ca1\u6709\u4e00\u5bb6\u613f\u610f\u6539\u53d8\u81ea\u5df1\u6240\u652f\u6301\u7684\u6807\u51c6\u3002\u5176\u7ed3\u679c\u662f\uff1a\u5728\u4e0d\u540c\u7684\u5c40\u57df\u7f51\u95f4\u590d\u5236\u5e27\u8981\u6392\u683c\u5f0f\uff0c\u8fd9\u9700\u8981\u5360\u7528CPU\u65f6\u95f4\uff0c\u91cd\u65b0\u8ba1\u7b97\u6821\u9a8c\u548c\uff0c\u800c\u4e14\u8fd8\u6709\u53ef\u80fd\u4ea7\u751f\u56e0\u7f51\u6865\u5b58\u50a8\u9519\u8bef\u800c\u9020\u6210\u7684\u65e0\u6cd5\u68c0\u6d4b\u7684\u9519\u8bef\u3002 <\/p>\n
\u7b2c\u4e8c\u4e2a\u95ee\u9898\u662f\u4e92\u8054\u7684\u5c40\u57df\u7f51\u5e76\u975e\u5fc5\u987b\u6309\u76f8\u540c\u7684\u6570\u636e\u4f20\u8f93\u901f\u7387\u8fd0\u884c\u3002\u5f53\u5feb\u901f\u7684\u5c40\u57df\u7f51\u5411\u6162\u901f\u7684\u5c40\u57df\u7f51\u53d1\u9001\u4e00\u957f\u4e32\u8fde\u7eed\u5e27\u65f6\uff0c\u7f51\u6865\u5904\u7406\u5e27\u7684\u901f\u5ea6\u8981\u6bd4\u5e27\u8fdb\u5165\u7684\u901f\u5ea6\u6162\u3002\u7f51\u6865\u5fc5\u987b\u7528\u7f13\u51b2\u533a\u5b58\u50a8\u6765\u4e0d\u53ca\u5904\u7406\u7684\u5e27\uff0c\u540c\u65f6\u8fd8\u5f97\u63d0\u9632\u8017\u5c3d\u5b58\u50a8\u5668\u3002\u5373\u4f7f\u662f10Mb\/s\u7684802.4\u523010Mb\/s\u7684802.3\u7684\u7f51\u6865\uff0c\u5728\u67d0\u79cd\u7a0b\u5ea6\u4e0a\u4e5f\u5b58\u5728\u8fd9\u6837\u7684\u95ee\u9898\u3002\u56e0\u4e3a802.3\u7684\u90e8\u5206\u5e26\u5bbd\u8017\u8d39\u4e8e\u51b2\u7a81\u3002802.3\u5b9e\u9645\u4e0a\u5e76\u4e0d\u662f\u771f\u768410Mb\/s\uff0c\u800c802.4(\u51e0\u4e4e)\u786e\u5b9e\u4e3a10Mb\/s\u3002 <\/p>\n
\u4e0e\u7f51\u6865\u74f6\u9888\u95ee\u9898\u76f8\u5173\u7684\u4e00\u4e2a\u7ec6\u5fae\u800c\u91cd\u8981\u7684\u95ee\u9898\u662f\u5176\u4e0a\u5404\u5c42\u7684\u8ba1\u65f6\u5668\u503c\u3002\u5047\u5982802.4\u5c40\u57df\u7f51\u4e0a\u7684\u7f51\u7edc\u5c42\u60f3\u53d1\u9001\u4e00\u6bb5\u5f88\u957f\u7684\u62a5\u6587(\u5e27\u5e8f\u5217)\u3002\u5728\u53d1\u51fa\u6700\u540e\u4e00\u5e27\u4e4b\u540e\uff0c\u5b83\u5f00\u542f\u4e00\u4e2a\u8ba1\u65f6\u5668\uff0c\u7b49\u5f85\u786e\u8ba4\u3002\u5982\u679c\u6b64\u62a5\u6587\u5fc5\u987b\u901a\u8fc7\u7f51\u6865\u8f6c\u5230\u6162\u901f\u7684802.5\u7f51\u7edc\uff0c\u90a3\u4e48\u5728\u6700\u540e\u4e00\u5e27\u88ab\u8f6c\u53d1\u5230\u4f4e\u901f\u5c40\u57df\u7f51\u4e4b\u524d\uff0c\u8ba1\u65f6\u5668\u5c31\u6709\u53ef\u80fd\u65f6\u95f4\u5230\u3002\u7f51\u7edc\u5c42\u53ef\u80fd\u4f1a\u4ee5\u4e3a\u5e27\u4e22\u5931\u800c\u91cd\u65b0\u53d1\u9001\u6574\u4e2a\u62a5\u6587\u3002\u51e0\u6b21\u4f20\u9001\u5931\u8d25\u540e\uff0c\u7f51\u7edc\u5c42\u5c31\u4f1a\u653e\u5f03\u4f20\u8f93\u5e76\u544a\u8bc9\u4f20\u8f93\u5c42\u76ee\u7684\u7ad9\u70b9\u5df2\u7ecf\u5173\u673a\u3002 <\/p>\n
\u7b2c\u4e09\uff0c\u5728\u6240\u6709\u7684\u95ee\u9898\u4e2d\uff0c\u53ef\u80fd\u6700\u4e3a\u4e25\u91cd\u7684\u95ee\u9898\u662f\u4e09\u79cd802 LAN\u6709\u4e0d\u540c\u7684\u6700\u5927\u5e27\u957f\u5ea6\u3002\u5bf9\u4e8e802.3\uff0c\u6700\u5927\u5e27\u957f\u5ea6\u53d6\u51b3\u4e8e\u914d\u7f6e\u53c2\u6570\uff0c\u4f46\u5bf9\u6807\u51c6\u768410M\/bs\u7cfb\u7edf\u6700\u5927\u6709\u6548\u8f7d\u8377\u4e3a1500\u5b57\u8282\u3002802.4\u7684\u6700\u5927\u5e27\u957f\u5ea6\u56fa\u5b9a\u4e3a8191\u5b57\u8282\u3002802.5\u6ca1\u6709\u4e0a\u9650\uff0c\u53ea\u8981\u7ad9\u70b9\u7684\u4f20\u8f93\u65f6\u95f4\u4e0d\u8d85\u8fc7\u4ee4\u724c\u6301\u6709\u65f6\u95f4\u3002\u5982\u679c\u4ee4\u724c\u65f6\u95f4\u7f3a\u7701\u4e3a10ms\uff0c\u5219\u6700\u5927\u5e27\u957f\u5ea6\u4e3a5000\u5b57\u8282\u3002\u4e00\u4e2a\u663e\u800c\u6613\u89c1\u7684\u95ee\u9898\u51fa\u73b0\u4e86\uff1a\u5f53\u5fc5\u987b\u628a\u4e00\u4e2a\u957f\u5e27\u8f6c\u53d1\u7ed9\u4e0d\u80fd\u63a5\u6536\u957f\u5e27\u7684\u5c40\u57df\u7f51\u65f6\uff0c\u5c06\u4f1a\u600e\u4e48\u6837\uff1f\u5728\u672c\u5c42\u4e2d\u4e0d\u8003\u8651\u628a\u5e27\u5206\u6210\u5c0f\u6bb5\u3002\u6240\u6709\u7684\u534f\u8bae\u90fd\u5047\u5b9a\u5e27\u8981\u4e48\u5230\u8fbe\u8981\u4e48\u6ca1\u6709\u5230\u8fbe\uff0c\u6ca1\u6709\u6761\u6b3e\u89c4\u5b9a\u628a\u66f4\u5c0f\u7684\u5355\u4f4d\u91cd\u7ec4\u6210\u5e27\u3002\u8fd9\u5e76\u4e0d\u662f\u8bf4\u4e0d\u80fd\u8bbe\u8ba1\u8fd9\u6837\u7684\u534f\u8bae\uff0c\u53ef\u4ee5\u8bbe\u8ba1\u5e76\u5df2\u6709\u8fd9\u79cd\u534f\u8bae\uff0c\u53ea\u662f802\u4e0d\u63d0\u4f9b\u8fd9\u79cd\u529f\u80fd\u3002\u8fd9\u4e2a\u95ee\u9898\u57fa\u672c\u4e0a\u65e0\u6cd5\u89e3\u51b3\uff0c\u5fc5\u987b\u4e22\u5f03\u56e0\u592a\u957f\u800c\u65e0\u6cd5\u8f6c\u53d1\u7684\u5e27\u3002\u5176\u900f\u660e\u7a0b\u5ea6\u4e5f\u5c31\u8fd9\u6837\u4e86\u3002 <\/p>\n
\u7531\u4e8e\u5404\u79cd802 LAN\u7684\u7279\u6b8a\u6027\uff0c\u5982\uff1a802.4\u5e27\u5e26\u6709\u4f18\u5148\u6743\u4f4d\u3001802.5\u5e27\u5b57\u8282\u4e2d\u6709A\u548cC\u4f4d\u7b49\uff0c\u4e5d\u79cd\u7f51\u6865\u90fd\u6709\u5176\u7279\u6b8a\u7684\u95ee\u9898\uff0c\u89c1\u4e0b\u8868\uff1a <\/p>\n
\u3000 \u3000 \u76ee\u7684LAN
\u3000 \u3000 802.3(CSMA\/CD) 802.4(\u4ee4\u724c\u603b\u7ebf) 802.5(\u4ee4\u724c\u73af)
\u6e90LAN 802.3 \u3000 1,4 1,2,4,8
802.4 1,5,8,9,10 9 1,2,3,8,9,10
802.5 1,2,5,6,7,10 1,2,3,6,7 6,7 <\/p>\n
1\u3001\u91cd\u65b0\u683c\u5f0f\u5316\u5e27\uff0c\u5e76\u8ba1\u7b97\u65b0\u7684\u6821\u9a8c\u548c\u3002
2\u3001\u53cd\u8f6c\u6bd4\u7279\u987a\u5e8f\u3002
3\u3001\u590d\u5236\u4f18\u5148\u6743\u503c\uff0c\u4e0d\u7ba1\u6709\u65e0\u610f\u4e49\u3002
4\u3001\u4ea7\u751f\u4e00\u4e2a\u5047\u60f3\u7684\u4f18\u5148\u6743\u3002
5\u3001\u4e22\u5f03\u4f18\u5148\u6743\u3002
6\u3001\u6d41\u5411\u73af\uff08\u67d0\u79cd\u7a0b\u5ea6\u4e0a\uff09\u3002
7\u3001\u8bbe\u7f6eA\u4f4d\u548cC\u4f4d\u3002
8\u3001\u62c5\u5fc3\u62e5\u585e\uff08\u5feb\u901fLAN\u81f3\u6162\u901fLAN\uff09\u3002
9\u3001\u62c5\u5fc3\u4ee4\u724c\u56e0\u4e3a\u4ea4\u6362ACK\u5ef6\u8fdf\u6216\u4e0d\u53ef\u80fd\u800c\u8131\u624b\u3002
10\u3001\u5982\u679c\u5e27\u5bf9\u76ee\u7684LAN\u592a\u957f\uff0c\u5219\u5c06\u5176\u4e22\u5f03\u3002 <\/p>\n
\u8bbe\u5b9a\u7684\u53c2\u6570\uff1a
802.3\uff1a1500\u5b57\u8282\u5e27 10Mb\/s(\u51cf\u53bb\u78b0\u649e\u6b21\u6570)
802.4\uff1a8191\u5b57\u8282\u5e27 10Mb\/s
802.5\uff1a5000\u5b57\u8282\u5e27 4Mb\/s <\/p>\n
\u5f53IEEE802\u59d4\u5458\u4f1a\u5f00\u59cb\u5236\u8ba2LAN\u6807\u51c6\u65f6\uff0c\u672a\u80fd\u5546\u5b9a\u4e00\u4e2a\u7edf\u4e00\u7684\u6807\u51c6\uff0c\u5374\u4ea7\u751f\u4e863\u4e2a\u4e92\u4e0d\u517c\u5bb9\u7684\u6807\u51c6\uff0c\u8fd9\u4e00\u5931\u7b56\u5df2\u53d7\u5230\u4e86\u4e25\u5389\u7684\u62a8\u51fb\u3002\u540e\u6765\uff0c\u5728\u5236\u5b9a\u4e92\u8054\u8fd93\u79cdLAN\u7684\u7f51\u6865\u7684\u6807\u51c6\u65f6\uff0c\u8be5\u59d4\u5458\u4f1a\u51b3\u5fc3\u5e72\u5f97\u597d\u4e00\u4e9b\u3002\u8fd9\u4e00\u6b21\u786e\u5b9e\u8f83\u4e3a\u6210\u529f\uff0c\u4ed6\u4eec\u63d0\u51fa\u4e862\u79cd\u4e92\u4e0d\u517c\u5bb9\u7684\u7f51\u6865\u65b9\u6848\u3002\u76f4\u5230\u76ee\u524d\u4e3a\u6b62\uff0c\u8fd8\u65e0\u4eba\u8981\u6c42\u8be5\u59d4\u5458\u4f1a\u5236\u8ba2\u8fde\u63a5\u5b83\u76842\u4e2a\u4e0d\u517c\u5bb9\u7f51\u6865\u7684\u7f51\u5173\u6807\u51c6\u3002 <\/p>\n
\u56db\u3001\u4e24\u79cd\u7f51\u6865 <\/p>\n
1\u3001\u900f\u660e\u7f51\u6865 <\/p>\n
\u7b2c\u4e00\u79cd802\u7f51\u6865\u662f\u900f\u660e\u7f51\u6865(transparent bridge)\u6216\u751f\u6210\u6811\u7f51\u6865(spanning tree bridge)\u3002\u652f\u6301\u8fd9\u79cd\u8bbe\u8ba1\u7684\u4eba\u9996\u8981\u5173\u5fc3\u7684\u662f\u5b8c\u5168\u900f\u660e\u3002\u6309\u7167\u4ed6\u4eec\u7684\u89c2\u70b9\uff0c\u88c5\u6709\u591a\u4e2aLAN\u7684\u5355\u4f4d\u5728\u4e70\u56deIEEE\u6807\u51c6\u7f51\u6865\u4e4b\u540e\uff0c\u53ea\u9700\u628a\u8fde\u63a5\u63d2\u5934\u63d2\u5165\u7f51\u6865\uff0c\u5c31\u4e07\u4e8b\u5927\u5409\u3002\u4e0d\u9700\u8981\u6539\u52a8\u786c\u4ef6\u548c\u8f6f\u4ef6\uff0c\u65e0\u9700\u8bbe\u7f6e\u5730\u5740\u5f00\u5173\uff0c\u65e0\u9700\u88c5\u5165\u8def\u7531\u8868\u6216\u53c2\u6570\u3002\u603b\u4e4b\u4ec0\u4e48\u4e5f\u4e0d\u5e72\uff0c\u53ea\u987b\u63d2\u5165\u7535\u5c31\u5b8c\u4e8b\uff0c\u73b0\u6709LAN\u7684\u8fd0\u884c\u5b8c\u5168\u4e0d\u53d7\u7f51\u6865\u7684\u4efb\u4f55\u5f71\u54cd\u3002\u8fd9\u771f\u662f\u4e0d\u53ef\u601d\u8bae\uff0c\u4ed6\u4eec\u6700\u7ec8\u6210\u529f\u4e86\u3002 <\/p>\n
\u900f\u660e\u7f51\u6865\u4ee5\u6df7\u6742\u65b9\u5f0f\u5de5\u4f5c\uff0c\u5b83\u63a5\u6536\u4e0e\u4e4b\u8fde\u63a5\u7684\u6240\u6709LAN\u4f20\u9001\u7684\u6bcf\u4e00\u5e27\u3002\u5f53\u4e00\u5e27\u5230\u8fbe\u65f6\uff0c\u7f51\u6865\u5fc5\u987b\u51b3\u5b9a\u5c06\u5176\u4e22\u5f03\u8fd8\u662f\u8f6c\u53d1\u3002\u5982\u679c\u8981\u8f6c\u53d1\uff0c\u5219\u5fc5\u987b\u51b3\u5b9a\u53d1\u5f80\u54ea\u4e2aLAN\u3002\u8fd9\u9700\u8981\u901a\u8fc7\u67e5\u8be2\u7f51\u6865\u4e2d\u4e00\u5f20\u5927\u578b\u6563\u5217\u8868\u91cc\u7684\u76ee\u7684\u5730\u5740\u800c\u4f5c\u51fa\u51b3\u5b9a\u3002\u8be5\u8868\u53ef\u5217\u51fa\u6bcf\u4e2a\u53ef\u80fd\u7684\u76ee\u7684\u5730\uff0c\u4ee5\u53ca\u5b83\u5c5e\u4e8e\u54ea\u4e00\u6761\u8f93\u51fa\u7ebf\u8def(LAN)\u3002\u5728\u63d2\u5165\u7f51\u6865\u4e4b\u521d\uff0c\u6240\u6709\u7684\u6563\u5217\u8868\u5747\u4e3a\u7a7a\u3002\u7531\u4e8e\u7f51\u6865\u4e0d\u77e5\u9053\u4efb\u4f55\u76ee\u7684\u5730\u7684\u4f4d\u7f6e\uff0c\u56e0\u800c\u91c7\u7528\u6269\u6563\u7b97\u6cd5(flooding algorithm)\uff1a\u628a\u6bcf\u4e2a\u5230\u6765\u7684\u3001\u76ee\u7684\u5730\u4e0d\u660e\u7684\u5e27\u8f93\u51fa\u5230\u8fde\u5728\u6b64\u7f51\u6865\u7684\u6240\u6709LAN\u4e2d\uff08\u9664\u4e86\u53d1\u9001\u8be5\u5e27\u7684LAN\uff09\u3002\u968f\u7740\u65f6\u95f4\u7684\u63a8\u79fb\uff0c\u7f51\u6865\u5c06\u4e86\u89e3\u6bcf\u4e2a\u76ee\u7684\u5730\u7684\u4f4d\u7f6e\u3002\u4e00\u65e6\u77e5\u9053\u4e86\u76ee\u7684\u5730\u4f4d\u7f6e\uff0c\u53d1\u5f80\u8be5\u5904\u7684\u5e27\u5c31\u53ea\u653e\u5230\u9002\u5f53\u7684LAN\u4e0a\uff0c\u800c\u4e0d\u518d\u6563\u53d1\u3002 <\/p>\n
\u900f\u660e\u7f51\u6865\u91c7\u7528\u7684\u7b97\u6cd5\u662f\u9006\u5411\u5b66\u4e60\u6cd5(backward learning)\u3002\u7f51\u6865\u6309\u6df7\u6742\u7684\u65b9\u5f0f\u5de5\u4f5c\uff0c\u6545\u5b83\u80fd\u770b\u89c1\u6240\u8fde\u63a5\u7684\u4efb\u4e00LAN\u4e0a\u4f20\u9001\u7684\u5e27\u3002\u67e5\u770b\u6e90\u5730\u5740\u5373\u53ef\u77e5\u9053\u5728\u54ea\u4e2aLAN\u4e0a\u53ef\u8bbf\u95ee\u54ea\u53f0\u673a\u5668\uff0c\u4e8e\u662f\u5728\u6563\u5217\u8868\u4e2d\u6dfb\u4e0a\u4e00\u9879\u3002 <\/p>\n
\u5f53\u8ba1\u7b97\u673a\u548c\u7f51\u6865\u52a0\u7535\u3001\u65ad\u7535\u6216\u8fc1\u79fb\u65f6\uff0c\u7f51\u7edc\u7684\u62d3\u6251\u7ed3\u6784\u4f1a\u968f\u4e4b\u6539\u53d8\u3002\u4e3a\u4e86\u5904\u7406\u52a8\u6001\u62d3\u6251\u95ee\u9898\uff0c\u6bcf\u5f53\u589e\u52a0\u6563\u5217\u8868\u9879\u65f6\uff0c\u5747\u5728\u8be5\u9879\u4e2d\u6ce8\u660e\u5e27\u7684\u5230\u8fbe\u65f6\u95f4\u3002\u6bcf\u5f53\u76ee\u7684\u5730\u5df2\u5728\u8868\u4e2d\u7684\u5e27\u5230\u8fbe\u65f6\uff0c\u5c06\u4ee5\u5f53\u524d\u65f6\u95f4\u66f4\u65b0\u8be5\u9879\u3002\u8fd9\u6837\uff0c\u4ece\u8868\u4e2d\u6bcf\u9879\u7684\u65f6\u95f4\u5373\u53ef\u77e5\u9053\u8be5\u673a\u5668\u6700\u540e\u5e27\u5230\u6765\u7684\u65f6\u95f4\u3002\u7f51\u6865\u4e2d\u6709\u4e00\u4e2a\u8fdb\u7a0b\u5b9a\u671f\u5730\u626b\u63cf\u6563\u5217\u8868\uff0c\u6e05\u9664\u65f6\u95f4\u65e9\u4e8e\u5f53\u524d\u65f6\u95f4\u82e5\u5e72\u5206\u949f\u7684\u5168\u90e8\u8868\u9879\u3002\u4e8e\u662f\uff0c\u5982\u679c\u4eceLAN\u4e0a\u53d6\u4e0b\u4e00\u53f0\u8ba1\u7b97\u673a\uff0c\u5e76\u5728\u522b\u5904\u91cd\u65b0\u8fde\u5230LAN\u4e0a\u7684\u8bdd\uff0c\u90a3\u4e48\u5728\u51e0\u5206\u949f\u5185\uff0c\u5b83\u5373\u53ef\u91cd\u65b0\u5f00\u59cb\u6b63\u5e38\u5de5\u4f5c\u800c\u65e0\u987b\u4eba\u5de5\u5e72\u9884\u3002\u8fd9\u4e2a\u7b97\u6cd5\u540c\u65f6\u4e5f\u610f\u5473\u7740\uff0c\u5982\u679c\u673a\u5668\u5728\u51e0\u5206\u949f\u5185\u65e0\u52a8\u4f5c\uff0c\u90a3\u4e48\u53d1\u7ed9\u5b83\u7684\u5e27\u5c06\u4e0d\u5f97\u4e0d\u6563\u53d1\uff0c\u4e00\u76f4\u5230\u5b83\u81ea\u5df1\u53d1\u9001\u51fa\u4e00\u5e27\u4e3a\u6b62\u3002 <\/p>\n
\u5230\u8fbe\u5e27\u7684\u8def\u7531\u9009\u62e9\u8fc7\u7a0b\u53d6\u51b3\u4e8e\u53d1\u9001\u7684LAN(\u6e90LAN)\u548c\u76ee\u7684\u5730\u6240\u5728\u7684LAN(\u76ee\u7684LAN)\uff0c\u5982\u4e0b\u6240\u793a\uff1a <\/p>\n
1\u3001\u5982\u679c\u6e90LAN\u548c\u76ee\u7684LAN\u76f8\u540c\uff0c\u5219\u4e22\u5f03\u8be5\u5e27\u3002
2\u3001\u5982\u679c\u6e90LAN\u548c\u76ee\u7684LAN\u4e0d\u540c\uff0c\u5219\u8f6c\u53d1\u8be5\u5e27\u3002
3\u3001\u5982\u679c\u76ee\u7684LAN\u672a\u77e5\uff0c\u5219\u8fdb\u884c\u6269\u6563\u3002 <\/p>\n
\u4e3a\u4e86\u63d0\u9ad8\u53ef\u9760\u6027\uff0c\u6709\u4eba\u5728LAN\u4e4b\u95f4\u8bbe\u7f6e\u4e86\u5e76\u884c\u7684\u4e24\u4e2a\u6216\u591a\u4e2a\u7f51\u6865\uff0c\u4f46\u662f\uff0c\u8fd9\u79cd\u914d\u7f6e\u5f15\u8d77\u4e86\u53e6\u5916\u4e00\u4e9b\u95ee\u9898\uff0c\u56e0\u4e3a\u5728\u62d3\u6251\u7ed3\u6784\u4e2d\u4ea7\u751f\u4e86\u56de\u8def\uff0c\u53ef\u80fd\u5f15\u53d1\u65e0\u9650\u5faa\u73af\u3002\u5176\u89e3\u51b3\u65b9\u6cd5\u5c31\u662f\u4e0b\u9762\u8981\u8bb2\u7684\u751f\u6210\u6811(spanning tree)\u7b97\u6cd5\u3002 <\/p>\n
\u751f\u6210\u6811\u7f51\u6865 <\/p>\n
\u89e3\u51b3\u4e0a\u9762\u6240\u8bf4\u7684\u65e0\u9650\u5faa\u73af\u95ee\u9898\u7684\u65b9\u6cd5\u662f\u8ba9\u7f51\u6865\u76f8\u4e92\u901a\u4fe1\uff0c\u5e76\u7528\u4e00\u68f5\u5230\u8fbe\u6bcf\u4e2aLAN\u7684\u751f\u6210\u6811\u8986\u76d6\u5b9e\u9645\u7684\u62d3\u6251\u7ed3\u6784\u3002\u4f7f\u7528\u751f\u6210\u6811\uff0c\u53ef\u4ee5\u786e\u4fdd\u4efb\u4e24\u4e2aLAN\u4e4b\u95f4\u53ea\u6709\u552f\u4e00\u4e00\u6761\u8def\u5f84\u3002\u4e00\u65e6\u7f51\u6865\u5546\u5b9a\u597d\u751f\u6210\u6811\uff0cLAN\u95f4\u7684\u6240\u6709\u4f20\u9001\u90fd\u9075\u4ece\u6b64\u751f\u6210\u6811\u3002\u7531\u4e8e\u4ece\u6bcf\u4e2a\u6e90\u5230\u6bcf\u4e2a\u76ee\u7684\u5730\u53ea\u6709\u552f\u4e00\u7684\u8def\u5f84\uff0c\u6545\u4e0d\u53ef\u80fd\u518d\u6709\u5faa\u73af\u3002 <\/p>\n
\u4e3a\u4e86\u5efa\u9020\u751f\u6210\u6811\uff0c\u9996\u5148\u5fc5\u987b\u9009\u51fa\u4e00\u4e2a\u7f51\u6865\u4f5c\u4e3a\u751f\u6210\u6811\u7684\u6839\u3002\u5b9e\u73b0\u7684\u65b9\u6cd5\u662f\u6bcf\u4e2a\u7f51\u6865\u5e7f\u64ad\u5176\u5e8f\u5217\u53f7\uff08\u8be5\u5e8f\u5217\u53f7\u7531\u5382\u5bb6\u8bbe\u7f6e\u5e76\u4fdd\u8bc1\u5168\u7403\u552f\u4e00\uff09\uff0c\u9009\u5e8f\u5217\u53f7\u6700\u5c0f\u7684\u7f51\u6865\u4f5c\u4e3a\u6839\u3002\u63a5\u7740\uff0c\u6309\u6839\u5230\u6bcf\u4e2a\u7f51\u6865\u7684\u6700\u77ed\u8def\u5f84\u6765\u6784\u9020\u751f\u6210\u6811\u3002\u5982\u679c\u67d0\u4e2a\u7f51\u6865\u6216LAN\u6545\u969c\uff0c\u5219\u91cd\u65b0\u8ba1\u7b97\u3002 <\/p>\n
\u7f51\u6865\u901a\u8fc7BPDU(Bridge Protocol Data Unit)\u4e92\u76f8\u901a\u4fe1\uff0c\u5728\u7f51\u6865\u505a\u51fa\u914d\u7f6e\u81ea\u5df1\u7684\u51b3\u5b9a\u524d\uff0c\u6bcf\u4e2a\u7f51\u6865\u548c\u6bcf\u4e2a\u7aef\u53e3\u9700\u8981\u4e0b\u5217\u914d\u7f6e\u6570\u636e\uff1a <\/p>\n
\u7f51\u6865\uff1a\u7f51\u6865 <\/p>\n
ID(\u552f\u4e00\u7684\u6807\u8bc6)\u7aef\u53e3\uff1a\u7aef\u53e3ID(\u552f\u4e00\u7684\u6807\u8bc6) \u7aef\u53e3\u76f8\u5bf9\u4f18\u5148\u6743 \u5404\u7aef\u53e3\u7684\u82b1\u8d39(\u9ad8\u5e26\u5bbd = \u4f4e\u82b1\u8d39) <\/p>\n
\u914d\u7f6e\u597d\u5404\u4e2a\u7f51\u6865\u540e\uff0c\u7f51\u6865\u5c06\u6839\u636e\u914d\u7f6e\u53c2\u6570\u81ea\u52a8\u786e\u5b9a\u751f\u6210\u6811\uff0c\u8fd9\u4e00\u8fc7\u7a0b\u6709\u4e09\u4e2a\u9636\u6bb5\uff1a <\/p>\n
1\u3001\u9009\u62e9\u6839\u7f51\u6865
\u5177\u6709\u6700\u5c0f\u7f51\u6865ID\u7684\u7f51\u6865\u88ab\u9009\u4f5c\u6839\u7f51\u6865\u3002\u7f51\u6865ID\u5e94\u4e3a\u552f\u4e00\u7684\uff0c\u4f46\u82e5\u4e24\u4e2a\u7f51\u6865\u5177\u6709\u76f8\u540c\u7684\u6700\u5c0fID\uff0c\u5219MAC\u5730\u5740\u5c0f\u7684\u7f51\u6865\u88ab\u9009\u4f5c\u6839\u3002 <\/p>\n
2\u3001\u5728\u5176\u5b83\u6240\u6709\u7f51\u6865\u4e0a\u9009\u62e9\u6839\u7aef\u53e3
\u9664\u6839\u7f51\u6865\u5916\u7684\u5404\u4e2a\u7f51\u6865\u9700\u8981\u9009\u4e2a\u6839\u7aef\u53e3\uff0c\u8fd9\u5e94\u8be5\u662f\u6700\u9002\u5408\u4e0e\u6839\u7f51\u6865\u901a\u4fe1\u7684\u7aef\u53e3\u3002\u901a\u8fc7\u8ba1\u7b97\u5404\u4e2a\u7aef\u53e3\u5230\u6839\u7f51\u6865\u7684\u82b1\u8d39\uff0c\u53d6\u6700\u5c0f\u8005\u4f5c\u4e3a\u6839\u7aef\u53e3\u3002 <\/p>\n
3\u3001\u9009\u62e9\u6bcf\u4e2aLAN\u7684\u201c\u6307\u5b9a(designated)\u7f51\u6865\u201d\u548c\u201c\u6307\u5b9a\u7aef\u53e3\u201d
\u5982\u679c\u53ea\u6709\u4e00\u4e2a\u7f51\u6865\u8fde\u5230\u67d0LAN\uff0c\u5b83\u5fc5\u7136\u662f\u8be5LAN\u7684\u6307\u5b9a\u7f51\u6865\uff0c\u5982\u679c\u591a\u4e8e\u4e00\u4e2a\uff0c\u5219\u5230\u6839\u7f51\u6865\u82b1\u8d39\u6700\u5c0f\u7684\u88ab\u9009\u4e3a\u8be5LAN\u7684\u6307\u5b9a\u7f51\u6865\u3002\u6307\u5b9a\u7aef\u53e3\u8fde\u63a5\u6307\u5b9a\u7f51\u6865\u548c\u76f8\u5e94\u7684LAN(\u5982\u679c\u8fd9\u6837\u7684\u7aef\u53e3\u591a\u4e8e\u4e00\u4e2a\uff0c\u5219\u4f4e\u4f18\u5148\u6743\u7684\u88ab\u9009)\u3002 <\/p>\n
\u4e00\u4e2a\u7aef\u53e3\u5fc5\u987b\u4e3a\u4e0b\u5217\u4e4b\u4e00\uff1a <\/p>\n
1\u3001\u6839\u7aef\u53e3
2\u3001\u67d0LAN\u7684\u6307\u5b9a\u7aef\u53e3
3\u3001\u963b\u585e\u7aef\u53e3 <\/p>\n
\u5f53\u4e00\u4e2a\u7f51\u6865\u52a0\u7535\u540e\uff0c\u5b83\u5047\u5b9a\u81ea\u5df1\u662f\u6839\u7f51\u6865\uff0c\u53d1\u9001\u51fa\u4e00\u4e2aCBPDU(Configuration Bridge Protocol Data Unit)\uff0c\u544a\u77e5\u5b83\u8ba4\u4e3a\u7684\u6839\u7f51\u6865ID\u3002\u4e00\u4e2a\u7f51\u6865\u6536\u5230\u4e00\u4e2a\u6839\u7f51\u6865ID\u5c0f\u4e8e\u5176\u6240\u77e5ID\u7684CBPDU\uff0c\u5b83\u5c06\u66f4\u65b0\u81ea\u5df1\u7684\u8868\uff0c\u5982\u679c\u8be5\u5e27\u4ece\u6839\u7aef\u53e3(\u4e0a\u4f20)\u5230\u8fbe\uff0c\u5219\u5411\u6240\u6709\u6307\u5b9a\u7aef\u53e3(\u4e0b\u4f20)\u5206\u53d1\u3002\u5f53\u4e00\u4e2a\u7f51\u6865\u6536\u5230\u4e00\u4e2a\u6839\u7f51\u6865ID\u5927\u4e8e\u5176\u6240\u77e5ID\u7684CBPDU\uff0c\u8be5\u4fe1\u606f\u88ab\u4e22\u5f03\uff0c\u5982\u679c\u8be5\u5e27\u4ece\u6307\u5b9a\u7aef\u53e3\u5230\u8fbe\uff0c\u5219\u56de\u9001\u4e00\u4e2a\u5e27\u544a\u77e5\u771f\u5b9e\u6839\u7f51\u6865\u7684\u8f83\u4f4eID\u3002 <\/p>\n
\u5f53\u6709\u610f\u5730\u6216\u7531\u4e8e\u7ebf\u8def\u6545\u969c\u5f15\u8d77\u7f51\u7edc\u91cd\u65b0\u914d\u7f6e\uff0c\u4e0a\u8ff0\u8fc7\u7a0b\u5c06\u91cd\u590d\uff0c\u4ea7\u751f\u4e00\u4e2a\u65b0\u7684\u751f\u6210\u6811\u3002 <\/p>\n
2\u3001\u6e90\u8def\u7531\u9009\u62e9\u7f51\u6865 <\/p>\n
\u900f\u660e\u7f51\u6865\u7684\u4f18\u70b9\u662f\u6613\u4e8e\u5b89\u88c5\uff0c\u53ea\u9700\u63d2\u8fdb\u7535\u7f06\u5373\u5927\u529f\u544a\u6210\u3002\u4f46\u662f\u4ece\u53e6\u4e00\u65b9\u9762\u6765\u8bf4\uff0c\u8fd9\u79cd\u7f51\u6865\u5e76\u6ca1\u6709\u6700\u4f73\u5730\u5229\u7528\u5e26\u5bbd\uff0c\u56e0\u4e3a\u5b83\u4eec\u4ec5\u4ec5\u7528\u5230\u4e86\u62d3\u6251\u7ed3\u6784\u7684\u4e00\u4e2a\u5b50\u96c6(\u751f\u6210\u6811)\u3002\u8fd9\u4e24\u4e2a\uff08\u6216\u5176\u4ed6\uff09\u56e0\u7d20\u7684\u76f8\u5bf9\u91cd\u8981\u6027\u5bfc\u81f4\u4e86802\u59d4\u5458\u4f1a\u5185\u90e8\u7684\u5206\u88c2\u3002\u652f\u6301CSMA\/CD\u548c\u4ee4\u724c\u603b\u7ebf\u7684\u4eba\u9009\u62e9\u4e86\u900f\u660e\u7f51\u6865\uff0c\u800c\u4ee4\u724c\u73af\u7684\u652f\u6301\u8005\u5219\u504f\u7231\u4e00\u79cd\u79f0\u4e3a\u6e90\u8def\u7531\u9009\u62e9(source routing)\u7684\u7f51\u6865\uff08\u53d7\u5230IBM\u7684\u9f13\u52b1\uff09\u3002 <\/p>\n
\u6e90\u8def\u7531\u9009\u62e9\u7684\u6838\u5fc3\u601d\u60f3\u662f\u5047\u5b9a\u6bcf\u4e2a\u5e27\u7684\u53d1\u9001\u8005\u90fd\u77e5\u9053\u63a5\u6536\u8005\u662f\u5426\u5728\u540c\u4e00LAN\u4e0a\u3002\u5f53\u53d1\u9001\u4e00\u5e27\u5230\u53e6\u5916\u7684LAN\u65f6\uff0c\u6e90\u673a\u5668\u5c06\u76ee\u7684\u5730\u5740\u7684\u9ad8\u4f4d\u8bbe\u7f6e\u62101\u4f5c\u4e3a\u6807\u8bb0\u3002\u53e6\u5916\uff0c\u5b83\u8fd8\u5728\u5e27\u5934\u52a0\u8fdb\u6b64\u5e27\u5e94\u8d70\u7684\u5b9e\u9645\u8def\u5f84\u3002 <\/p>\n
\u6e90\u8def\u7531\u9009\u62e9\u7f51\u6865\u53ea\u5173\u5fc3\u90a3\u4e9b\u76ee\u7684\u5730\u5740\u9ad8\u4f4d\u4e3a1\u7684\u5e27\uff0c\u5f53\u89c1\u5230\u8fd9\u6837\u7684\u5e27\u65f6\uff0c\u5b83\u626b\u63cf\u5e27\u5934\u4e2d\u7684\u8def\u7531\uff0c\u5bfb\u627e\u53d1\u6765\u6b64\u5e27\u7684\u90a3\u4e2aLAN\u7684\u7f16\u53f7\u3002\u5982\u679c\u53d1\u6765\u6b64\u5e27\u7684\u90a3\u4e2aLAN\u7f16\u53f7\u540e\u8ddf\u7684\u662f\u672c\u7f51\u6865\u7684\u7f16\u53f7\uff0c\u5219\u5c06\u6b64\u5e27\u8f6c\u53d1\u5230\u8def\u7531\u8868\u4e2d\u81ea\u5df1\u540e\u9762\u7684\u90a3\u4e2aLAN\u3002\u5982\u679c\u8be5LAN\u7f16\u53f7\u540e\u8ddf\u7684\u4e0d\u662f\u672c\u7f51\u6865\uff0c\u5219\u4e0d\u8f6c\u53d1\u6b64\u5e27\u3002\u8fd9\u4e00\u7b97\u6cd5\u67093\u79cd\u53ef\u80fd\u7684\u5177\u4f53\u5b9e\u73b0\uff1a\u8f6f\u4ef6\u3001\u786c\u4ef6\u3001\u6df7\u5408\u3002\u8fd9\u4e09\u79cd\u5177\u4f53\u5b9e\u73b0\u7684\u4ef7\u683c\u548c\u6027\u80fd\u5404\u4e0d\u76f8\u540c\u3002\u7b2c\u4e00\u79cd\u6ca1\u6709\u63a5\u53e3\u786c\u4ef6\u5f00\u9500\uff0c\u4f46\u9700\u8981\u901f\u5ea6\u5f88\u5feb\u7684CPU\u5904\u7406\u6240\u6709\u5230\u6765\u7684\u5e27\u3002\u6700\u540e\u4e00\u79cd\u5b9e\u73b0\u9700\u8981\u7279\u6b8a\u7684VLSI\u82af\u7247\uff0c\u8be5\u82af\u7247\u5206\u62c5\u4e86\u7f51\u6865\u7684\u8bb8\u591a\u5de5\u4f5c\uff0c\u56e0\u6b64\uff0c\u7f51\u6865\u53ef\u4ee5\u91c7\u7528\u901f\u5ea6\u8f83\u6162\u7684CPU\uff0c\u6216\u8005\u53ef\u4ee5\u8fde\u63a5\u66f4\u591a\u7684LAN\u3002 <\/p>\n
\u6e90\u8def\u7531\u9009\u62e9\u7684\u524d\u63d0\u662f\u4e92\u8054\u7f51\u4e2d\u7684\u6bcf\u53f0\u673a\u5668\u90fd\u77e5\u9053\u6240\u6709\u5176\u4ed6\u673a\u5668\u7684\u6700\u4f73\u8def\u5f84\u3002\u5982\u4f55\u5f97\u5230\u8fd9\u4e9b\u8def\u7531\u662f\u6e90\u8def\u7531\u9009\u62e9\u7b97\u6cd5\u7684\u91cd\u8981\u90e8\u5206\u3002\u83b7\u53d6\u8def\u7531\u7b97\u6cd5\u7684\u57fa\u672c\u601d\u60f3\u662f\uff1a\u5982\u679c\u4e0d\u77e5\u9053\u76ee\u7684\u5730\u5730\u5740\u7684\u4f4d\u7f6e\uff0c\u6e90\u673a\u5668\u5c31\u53d1\u5e03\u4e00\u5e7f\u64ad\u5e27\uff0c\u8be2\u95ee\u5b83\u5728\u54ea\u91cc\u3002\u6bcf\u4e2a\u7f51\u6865\u90fd\u8f6c\u53d1\u8be5\u67e5\u627e\u5e27(discovery frame)\uff0c\u8fd9\u6837\u8be5\u5e27\u5c31\u53ef\u5230\u8fbe\u4e92\u8054\u7f51\u4e2d\u7684\u6bcf\u4e00\u4e2aLAN\u3002\u5f53\u7b54\u590d\u56de\u6765\u65f6\uff0c\u9014\u7ecf\u7684\u7f51\u6865\u5c06\u5b83\u4eec\u81ea\u5df1\u7684\u6807\u8bc6\u8bb0\u5f55\u5728\u7b54\u590d\u5e27\u4e2d\uff0c\u4e8e\u662f\uff0c\u5e7f\u64ad\u5e27\u7684\u53d1\u9001\u8005\u5c31\u53ef\u4ee5\u5f97\u5230\u786e\u5207\u7684\u8def\u7531\uff0c\u5e76\u53ef\u4ece\u4e2d\u9009\u53d6\u6700\u4f73\u8def\u7531\u3002 <\/p>\n
\u867d\u7136\u6b64\u7b97\u6cd5\u53ef\u4ee5\u627e\u5230\u6700\u4f73\u8def\u7531\uff08\u5b83\u627e\u5230\u4e86\u6240\u6709\u7684\u8def\u7531\uff09\uff0c\u4f46\u540c\u65f6\u4e5f\u9762\u4e34\u7740\u5e27\u7206\u70b8\u7684\u95ee\u9898\u3002\u900f\u660e\u7f51\u6865\u4e5f\u4f1a\u53d1\u751f\u6709\u70b9\u7c7b\u4f3c\u7684\u72b6\u51b5\uff0c\u4f46\u662f\u6ca1\u6709\u8fd9\u4e48\u4e25\u91cd\u3002\u5176\u6269\u6563\u662f\u6309\u751f\u6210\u6811\u8fdb\u884c\uff0c\u6240\u4ee5\u4f20\u9001\u7684\u603b\u5e27\u6570\u662f\u7f51\u7edc\u5927\u5c0f\u7684\u7ebf\u6027\u51fd\u6570\uff0c\u800c\u4e0d\u8c61\u6e90\u8def\u7531\u9009\u62e9\u662f\u6307\u6570\u51fd\u6570\u3002\u4e00\u65e6\u4e3b\u673a\u627e\u5230\u81f3\u67d0\u76ee\u7684\u5730\u7684\u4e00\u6761\u8def\u7531\uff0c\u5b83\u5c31\u5c06\u5176\u5b58\u5165\u5230\u9ad8\u901f\u7f13\u51b2\u5668\u4e4b\u4e2d\uff0c\u65e0\u9700\u518d\u4f5c\u67e5\u627e\u3002\u867d\u7136\u8fd9\u79cd\u65b9\u6cd5\u5927\u5927\u904f\u5236\u4e86\u5e27\u7206\u70b8\uff0c\u4f46\u5b83\u7ed9\u6240\u6709\u7684\u4e3b\u673a\u589e\u52a0\u4e86\u4e8b\u52a1\u6027\u8d1f\u62c5\uff0c\u800c\u4e14\u6574\u4e2a\u7b97\u6cd5\u80af\u5b9a\u662f\u4e0d\u900f\u660e\u7684\u3002 <\/p>\n
3\u3001\u4e24\u79cd\u7f51\u6865\u7684\u6bd4\u8f83 <\/p>\n
\u7279\u70b9 \u900f\u660e\u7f51\u6865 \u6e90\u8def\u7531\u9009\u62e9\u7f51\u6865 \u6ce8\u89e3
\u8fde\u63a5\u65b9\u5f0f \u65e0\u8fde\u63a5 \u9762\u5411\u8fde\u63a5 \u3000
\u900f\u660e\u6027 \u5b8c\u5168\u900f\u660e \u4e0d\u900f\u660e \u900f\u660e\u7f51\u6865\u5bf9\u4e3b\u673a\u6765\u8bf4\u662f\u5b8c\u5168\u4e0d\u53ef\u89c1\u7684\uff0c\u800c\u4e14\u5b83\u4e0e\u6240\u6709\u73b0\u5728\u7684802\u4ea7\u54c1\u5b8c\u5168\u517c\u5bb9\u3002\u6e90\u8def\u7531\u9009\u62e9\u7f51\u6865\u65e2\u4e0d\u900f\u660e\u53c8\u4e0d\u517c\u5bb9\u3002\u5982\u679c\u8981\u7528\u6e90\u8def\u7531\u9009\u62e9\u7f51\u6865\uff0c\u4e3b\u673a\u5fc5\u987b\u77e5\u9053\u6865\u63a5\u6a21\u5f0f\uff0c\u5fc5\u987b\u4e3b\u52a8\u5730\u53c2\u4e0e\u5de5\u4f5c\u3002
\u914d\u7f6e\u65b9\u5f0f \u81ea\u52a8 \u624b\u5de5 \u3000
\u8def\u7531 \u6b21\u4f18\u5316 \u4f18\u5316 \u6e90\u8def\u7531\u9009\u62e9\u7f51\u6865\u7684\u51e0\u4e2a\u4e0d\u591a\u7684\u4f18\u70b9\u4e4b\u4e00\u662f\uff1a\u4ece\u7406\u8bba\u4e0a\u8bb2\uff0c\u5b83\u53ef\u4f7f\u7528\u6700\u4f73\u8def\u7531\uff0c\u800c\u900f\u660e\u7f51\u6865\u5219\u53ea\u9650\u4e8e\u751f\u6210\u6811\uff0c\u53e6\u5916\uff0c\u6e90\u8def\u7531\u9009\u62e9\u7f51\u6865\u8fd8\u53ef\u4ee5\u5f88\u597d\u5730\u5229\u7528\u7f51\u95f4\u7684\u5e76\u884c\u7f51\u6865\u6765\u5206\u6563\u8f7d\u8377\u3002\u4e0d\u8fc7\u5728\u5b9e\u9645\u4e2d\uff0c\u7f51\u6865\u80fd\u5426\u5229\u7528\u8fd9\u4e9b\u7406\u8bba\u4e0a\u7684\u4f18\u70b9\u662f\u4ee4\u4eba\u6000\u7591\u7684\u3002
\u5b9a\u4f4d \u9006\u5411\u5b66\u4e60 \u53d1\u73b0\u5e27 \u9006\u5411\u5b66\u4e60\u7684\u7f3a\u70b9\u662f\uff1a\u7f51\u6865\u5fc5\u987b\u4e00\u76f4\u7b49\u5230\u78b0\u5de7\u6709\u4e00\u7279\u522b\u7684\u5e27\u5230\u6765\uff0c\u624d\u80fd\u77e5\u9053\u76ee\u7684\u5730\u5728\u4f55\u5904\u3002
\u67e5\u627e\u5e27\u7684\u7f3a\u70b9\u662f\uff1a\u5728\u6709\u5e76\u884c\u7f51\u6865\u7684\u5927\u578b\u4e92\u8054\u7f51\u4e2d\uff0c\u4f1a\u53d1\u751f\u6307\u6570\u7ea7\u7684\u5e27\u7206\u70b8\u3002
\u5931\u6548\u5904\u7406 \u7531\u7f51\u6865\u5904\u7406 \u7531\u4e3b\u673a\u5904\u7406 \u3000
\u590d\u6742\u6027 \u5728\u7f51\u6865\u4e2d \u5728\u4e3b\u673a\u4e2d \u7531\u4e8e\u4e3b\u673a\u6570\u91cf\u901a\u5e38\u6bd4\u7f51\u6865\u5927\u4e00\u4e24\u4e2a\u6570\u91cf\u7ea7\uff0c\u56e0\u6b64\uff0c\u6700\u597d\u628a\u989d\u5916\u7684\u5f00\u9500\u548c\u590d\u6742\u6027\u653e\u5230\u5c11\u91cf\u7684\u7f51\u6865\u4e2d\u800c\u4e0d\u662f\u5168\u90e8\u7684\u4e3b\u673a\u4e2d\u3002 <\/p>\n
\u900f\u660e\u7f51\u6865\u4e00\u822c\u7528\u4e8e\u8fde\u63a5\u4ee5\u592a\u7f51\u6bb5\uff0c\u800c\u6e90\u8def\u7531\u9009\u62e9\u7f51\u6865\u5219\u4e00\u822c\u7528\u4e8e\u8fde\u63a5\u4ee4\u724c\u73af\u7f51\u6bb5\u3002 <\/p>\n
\u4e94\u3001\u8fdc\u7a0b\u7f51\u6865 <\/p>\n
\u7f51\u6865\u6709\u65f6\u4e5f\u88ab\u7528\u6765\u8fde\u63a5\u4e24\u4e2a\u6216\u591a\u4e2a\u76f8\u8ddd\u8f83\u8fdc\u7684LAN\u3002\u6bd4\u5982\uff0c\u67d0\u4e2a\u516c\u53f8\u5206\u5e03\u5728\u591a\u4e2a\u57ce\u5e02\u4e2d\uff0c\u8be5\u516c\u53f8\u5728\u6bcf\u4e2a\u57ce\u5e02\u4e2d\u5747\u6709\u4e00\u4e2a\u672c\u5730\u7684LAN\uff0c\u6700\u7406\u60f3\u7684\u60c5\u51b5\u5c31\u662f\u6240\u6709\u7684LAN\u5747\u8fde\u63a5\u8d77\u6765\uff0c\u6574\u4e2a\u7cfb\u7edf\u5c31\u50cf\u4e00\u4e2a\u5927\u578b\u7684LAN\u4e00\u6837\u3002 <\/p>\n
\u8be5\u76ee\u6807\u53ef\u901a\u8fc7\u4e0b\u8ff0\u65b9\u6cd5\u5b9e\u73b0\uff1a\u6bcf\u4e2aLAN\u4e2d\u5747\u8bbe\u7f6e\u4e00\u4e2a\u7f51\u6865\uff0c\u5e76\u4e14\u7528\u70b9\u5230\u70b9\u7684\u8fde\u63a5\uff08\u6bd4\u5982\u79df\u7528\u7535\u8bdd\u516c\u53f8\u7684\u7535\u8bdd\u7ebf\uff09\u5c06\u5b83\u4eec\u4e24\u4e2a\u4e24\u4e2a\u5730\u8fde\u63a5\u8d77\u6765\u3002\u70b9\u5230\u70b9\u8fde\u7ebf\u53ef\u91c7\u7528\u5404\u79cd\u4e0d\u540c\u7684\u534f\u8bae\u3002\u529e\u6cd5\u4e4b\u4e00\u5c31\u662f\u9009\u7528\u67d0\u79cd\u6807\u51c6\u7684\u70b9\u5230\u70b9\u6570\u636e\u94fe\u8def\u534f\u8bae\uff0c\u5c06\u5b8c\u6574\u7684MAC\u5e27\u52a0\u5230\u6709\u6548\u8f7d\u8377\u4e2d\u3002\u5982\u679c\u6240\u6709\u7684LAN\u5747\u76f8\u540c\uff0c\u8fd9\u79cd\u529e\u6cd5\u7684\u6548\u679c\u6700\u597d\uff0c\u5b83\u7684\u552f\u4e00\u95ee\u9898\u5c31\u662f\u5fc5\u987b\u5c06\u5e27\u9001\u5230\u6b63\u786e\u7684LAN\u4e2d\u3002\u53e6\u4e00\u79cd\u529e\u6cd5\u662f\u5728\u6e90\u7f51\u6865\u4e2d\u53bb\u6389MAC\u7684\u5934\u90e8\u548c\u5c3e\u90e8\uff0c\u5e76\u628a\u5269\u4e0b\u7684\u90e8\u5206\u52a0\u5230\u70b9\u5230\u70b9\u534f\u8bae\u7684\u6709\u6548\u8f7d\u8377\u4e2d\uff0c\u7136\u540e\u5728\u76ee\u7684\u7f51\u6865\u4e2d\u4ea7\u751f\u65b0\u7684\u5934\u90e8\u548c\u5c3e\u90e8\u3002\u5b83\u7684\u7f3a\u70b9\u662f\u5230\u8fbe\u76ee\u7684\u4e3b\u673a\u7684\u6821\u9a8c\u548c\u5e76\u975e\u662f\u6e90\u4e3b\u673a\u6240\u8ba1\u7b97\u7684\u6821\u9a8c\u548c\uff0c\u56e0\u6b64\u7f51\u6865\u5b58\u50a8\u5668\u4e2d\u67d0\u4f4d\u635f\u574f\u6240\u4ea7\u751f\u7684\u9519\u8bef\u53ef\u80fd\u4e0d\u4f1a\u88ab\u68c0\u6d4b\u5230\u3002 <\/p>\n","protected":false},"excerpt":{"rendered":"
\u7f51\u6865\u57fa\u7840\u77e5\u8bc6\u4ecb\u7ecd \u4e00\u3001\u4ec0\u4e48\u662f\u7f51\u6865\uff1f \u7f51\u6865\u5de5\u4f5c\u5728\u6570\u636e\u94fe\u8def\u5c42\uff0c\u5c06\u4e24\u4e2aLAN\u8fde\u8d77\u6765\uff0c\u6839\u636eMAC\u5730\u5740\u6765\u8f6c\u53d1\u5e27\uff0c\u53ef\u4ee5\u770b\u4f5c […]<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4],"tags":[],"class_list":["post-68","post","type-post","status-publish","format-standard","hentry","category-4","category-4-id","post-seq-1","post-parity-odd","meta-position-corners","fix"],"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/www.icocean.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/68","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.icocean.com\/blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.icocean.com\/blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.icocean.com\/blog\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.icocean.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=68"}],"version-history":[{"count":0,"href":"https:\/\/www.icocean.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/68\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.icocean.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=68"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.icocean.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=68"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.icocean.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=68"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}