[单选题]帧中继环境下，为了区分虚电路，应该使用的地址是（）

正确答案 ：C

DLCI

[单选题]Given that you have a class B IP address network range, which of the subnet masks below will allow for 100 subnets with 500 usable host addresses per subnet?

正确答案 ：C

255.255.254.0

解析：解析：Explanation:

[单选题]查看路由表的命令是：()

正确答案 ：C

show ip route

[多选题]When you compare the differences between half-duplex and full-duplex Ethernet, which of the following characteristics are exclusive to half-duplex? (Select two answer choices)

正确答案 ：AD

Half-duplex Ethernet operates in a shared collision domain.

Half-duplex Ethernet has lower effective throughput.

解析：解析：Explanation:

[单选题]为了连接“帧中继”线路，网络中的路由器需要提供的端口类型为（）

正确答案 ：B

Serial

[多选题]Which of the following steps are necessary in order to add a new VLAN to the Ezonexam switched network? (Select all that apply)

正确答案 ：ABD

Create the VLAN.

Name the VLAN.

Add the desired ports to the new VLAN.

解析：解析：Explanation:

[多选题]You are bringing up a new Ezonexam switch, and wish to connect it via a trunk to another switch from a different vendor, which uses the IEEE standard for the trunking method. When setting the encapsulation type on the trunk, what should you configure on the Cisco switch?

正确答案 ：ABCDE

Switch(config) switchport trunk encapsulation isl

Switch(config) switchport trunk encapsulation ietf

Switch(config-if) switchport trunk encapsulation isl

Switch(config-if) switchport trunk encapsulation ietf

Switch(config-if) switchport trunk encapsulation dot1q

解析：解析：Explanation:

[单选题]路由器上“水平分割”的功能是：()

正确答案 ：B

阻止路由环路

[单选题]基本IP访问权限表的表号范围是：()

正确答案 ：B

1-99

[单选题]标准访问控制列表应被放置的最佳位置是在（）。

正确答案 ：B

越靠近数据包的目的地越好

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