下列选项中不属于数据链路层的广域网通信协议的是()。

A.HDLC

B.PPP

C.ICMP

D.Frame-Relay

Both bridges are switches are being used throughout the Ezonexam LAN. Which of the following statements are true regarding bridges and switches in this network?

(Choose 3)

A. Switches are primarily software based while bridges are hardware based.

B. Switches usually have a higher number of ports than most bridges.

C. Bridges are frequently faster than switches.

D. Bridges define broadcast domains while switches define collision domains.

E. Both bridges and switches forward Layer 2 broadcasts.

F. Both bridges and switches make forwarding decisions based on Layer 2 addresses.

在路由表中到达同一网络的路由有：静态路由、RIP路由、IGRP路由，OSPF路由，则路由器会选用哪条路由传输数据：()

A.静态路由

B.RIP路由

C.IGRP路由

D.OSPF路由

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

A．Create the VLAN.

B．Name the VLAN.

C．Configure an IP address for the VLAN.

D．Add the desired ports to the new VLAN.

E．Add the VLAN to the VTP domain.

哪个命令可以成功测试网络：()

A.Router>ping192.5.5.0

B.Routerping192.5.5.30

C.Router>ping192.5.5.256

D.Routerping192.5.5.255

187.0.0/19能划分（）个26位的子网

A.126

B.128

C.64

D.256

哪个命令能为下图中R1上配置正确的静态默认路由()

A.R1(config-if)iproute 0.0.0.0 0.0.0.0 s0/0/0

B.R1(config)iproute 0.0.0.0 0.0.0.0 s0/1/0

C.R1(config)iproute 0.0.0.0 0.0.0.0 192.168.12.1

D.R1(config)iproute 0.0.0.0 0.0.0.0 192.168.12.2

Cisco is the leader in the router market space. What basic functions do their routers perform. in a network? (Choose two)

A. The microsegmentation of broadcast domains

B. Path selection

C. Packet switching

D. Bridging between LAN segments

E. Access layer security

F. VLAN membership assignment

G. Application optimization

RIP用()作为度量值。

A.管理距离

B.带宽

C.跳数

D.时间

网络中经常使用DDN服务，请选出DDN的优点（）

A.传输质量高

B.接入方式灵活

C.偷占带宽

D.使用虚电路

E.专用线路

以下关于RIPV1与RIPV2的描述正确的有()

A.RIPV1和RIPV2都使用广播发送更新信息。

B.RIPV2使用组播发送更新信息。

C.RIPV1是无类路由协议。

D.RIPV2是支持变长子网掩码