求CISCO路由模拟软件，
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http://www.s8s8.org/download/moni.zip
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routersim大把的
还有很多FLASH的作品
我想关建也要看看CISCO的书.
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http://jxue.myrice.com/cisco.htm
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http://www.chinaitlegend.com/microsoft/mJS.htm
http://www.net130.net
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http://www.itcertifer.com/download/index.asp?classid=2&Nclassid=11
好象就这几个吧，我也正在用这个，感觉还可以。
有机会多交流。
QQ：998791
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到www.net130.com上找找看
http://www.net130.com/soft/attestation/mlq/sybex-router.zip
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!!!!!!!
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http://www.itcertifer.com/download/index.asp?classid=2&Nclassid=11