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問(wèn)答題

【簡(jiǎn)答題】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？

答案： Data link layer.

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單項(xiàng)選擇題

The interface is up and protocol is up. What level of logging is enabled when you get these messages？（）

A.alerts
B.errors
C.critical
D.notifications

問(wèn)答題

【簡(jiǎn)答題】You have two NTP servers 10.1.1.1 & 10.1.1.2 and want to configure a router to use 10.1.1.2 as its NTP server before falling back to 10.1.1.1. Which command will you use？

答案： Ntp server 10.1.1.1
Ntp server 10.1...