Two Cisco routers are connected to each other and are enabled CDP. Serial line is up,protocol is also up but cdp neighbor not working. What layer of the OSI model does the problem most likely exist?
正确答案:Data link layer.
答案解析:有
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Two Cisco routers are connected to each other and are enabled CDP. Serial line is up,protocol is also up but cdp neighbor not working. What layer of the OSI model does the problem most likely exist?
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