[单选题]当配置一个CISCO的路由器时，缺省的DR和BDR优先级是（）。

正确答案 ：B

1

[单选题]能够分配给设备的IP，应该是（）

正确答案 ：A

网络有效IP

[单选题]RIP协议负载均衡的路径数量为（）

正确答案 ：D

最多6条

[单选题]工作在OSI第三层的设备是：()

正确答案 ：B

路由器

[单选题]OSI七层模型中，传输层的数据封装名称为（）

正确答案 ：D

段

[单选题]A receiving host has failed to receive all of the segments that it should acknowledge.What can the host do to improve the reliability of this communication session?

正确答案 ：E

Decrease the window size

解析：解析：Explanation:

[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:

[多选题]With regard to Ethernet media access methods, which of the following are true?(Choose all that apply.)

正确答案 ：BC

A device listens and waits until the media is not busy before transmitting.

All devices on an Ethernet segment see data that passes on the network medium.

解析：解析：Explanation:

[单选题]把指定端口添加到VLAN的命令是：()

正确答案 ：D

switch port

[单选题]下列哪一个通配符掩码与子网172.16.64.0/27的所有主机匹配（）。

正确答案 ：C

0.0.0.31

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