[单选题]交换机上VLAN的功能描述中，正确的是（）

正确答案 ：B

可以减少广播对网络性能的影响

[单选题]You have just purchased a brand new router and wish to have the router prompt you through the initial configuration commands. Which router mode does this describe?

正确答案 ：B

SETUP mode

解析：解析：Explanation:

[单选题]以下（）LSA类型是ASBR来宣告外部路由信息的。（）

正确答案 ：E

类型5

[单选题]You are given a PC, a router, and a cable. Select the correct combination that will allow you to log into router VE1 locally using a terminal emulation program such as HyperTerminal.

正确答案 ：B

Connect the PC's COM port to the router's console port using a rollover cable.

解析：B 解析：Explanation:

[单选题]备份路由器IOS的命令是：()

正确答案 ：A

copy flash tftp

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