PPP工作在OSI的哪一层（）

A.物理层

B.数据链路层

C.网络层

D.传输层

The LAN needs are expanding at the Ezonexam corporate office, which is quickly growing. You are instructed to enlarge the area covered by a single LAN segment on the Ezonexam network.

Which of the following are layer 1 devices that you can use? (Choose all that apply.)

A．A switch

B．A router

C．A network adapter card

D．A hub

E．A repeater

Why might the Ezonexam network administrator set the configuration register to 0x2142 on a 2600 series Cisco router?

A．To boot the IOS from ROM

B．To reset the console password

C．To upload a new version of the configuration file

D．To upload a new version of the IOS

E．To allow a new memory upgrade to be recognized by the router

OSPF会运行算法以计算当前最佳路由。下列哪些术语会涉及到此算法()

A.SPF

B.DUAL

C.Feasible successor

D.Dijkstrae

E.Good old commonsense

RIP路由协议认为“网络不可到达”的跳数是：()

A.8

B.16

C.24

D.100

IEEE802.3把以太网链路层分成两个子层,分别是（）

A.物理子层

B.MAC子层

C.LLC子层

D.IP子层

RIP用()作为度量值。

A.管理距离

B.带宽

C.跳数

D.时间

In the Ezonexam switched LAN environment, what does the IEEE 802.1Q standard describe?

A. VLAN pruning

B. A method of VLAN trunking

C. An approach to wireless LAN communication

D. The operation of VTP

E. The process for root bridge selection

F. None of the above

A new Ezonexam switch is installed into an existing LAN and a new VTP trunk is set up with an existing switch. Which VLANs will be allowed on this new trunk?

A．All defined VLANs are allowed on the trunk by default.

B．Each VLAN, or VLAN range, that is specified with the switchport mode command.

C．Each VLAN, or VLAN range, that is specified with the vtp domain command.

D．Each VLAN, or VLAN range, that is specified with the vlan database command.

E．None of the above

The Ezonexam network administrator wants to use a router named VE1 to segment the local network. What are some of the advantages of using VE1 to segment the network? (Choose two)

A. Routers generally cost less than switches

B. Filtering can occur based on Layer 3 information

C. Broadcasts are not forwarded across the router

D. Broadcasts are eliminated

E. Adding a router to the network decreases latency

F. Routers can generally support more LAN ports than switches

What is the default configuration register setting on most Cisco routers?

A. 0x2104

B. 0x2012

C. 0x2210

D. 0x2102

E. 0x2142

F. None of the above