[多选题]CDP is being used throughout the Ezonexam network. What are two reasons why the Ezonexam network administrator would use CDP? (Choose two)

正确答案 ：BD

To obtain the IP Address of a connected device in order to telnet to the device

To verify Layer 2 connectivity between two devices when Layer 3 fails

[单选题]通配符掩码和子网掩码之间的关系是（）。

正确答案 ：A

两者没有什么区别

[单选题]默认情况下，RIP定期发送路由更新的时间是（）

正确答案 ：B

30S

[单选题]路由器“特权模式”的提示符是：（）

正确答案 ：B

[单选题]What kind of cable should be used to establish a trunked line between two Catalyst switches?

正确答案 ：E

A cross-over cable

解析：解析：Explanation: A crossover cable is used to connect two of the same device types, or devices from the same OSI layer.

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