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Cisco CCNA 640-802试题(141-145)

2008-07-14 12:55 佚名 51cto.com 字号:T | T
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本文内容为Cisco CCNA认证考试640-802(141-145)试题及答案。

AD:

141. What are two security appliances that can be installed in a network? (Choose two.)

A. ATM

B. IDS

C. IOS

D. IOX

E. IPS

F. SDM

Answer: BE


142. What will an Ethernet switch do if it receives a unicast frame with a destination MAC that is listed in theswitch table?

A. The switch will not forward unicast frames.

B. The switch will forward the frame to a specific port.

C. The switch will return a copy of the frame out the source port.

D. The switch will remove the destination MAC from the switch table.

E. The switch will forward the frame to all ports except the port on which it was received.

Answer: B


143. A Cisco router that was providing Frame Relay connectivity at a remote site was replaced with a differentvendor's frame relay router. Connectivity is now down between the central and remote site. What is the mostlikely cause of the problem?

A. mismatched LMI types

B. incorrect DLCI

C. mismatched encapsulation types

D. incorrect IP address mapping

Answer: C

144. The Ethernet networks connected to router R1 in the graphic have been summarized for router R2 as 192.1.144.0/20. Which of the following packet destination addresses will R2 forward to R1, according to thissummary? (Choose two.)

  

A. 192.1.159.2

B. 192.1.160.11

C. 192.1.138.41

D. 192.1.151.254

E. 192.1.143.145

F. 192.1.1.144

Answer: AD


145. A network administrator would like to implement NAT in the network shown in the graphic to allow insidehosts to use a private addressing scheme. Where should NAT be configured?

 


A. Corporate router

B. Engineering router

C. Sales router

D. all routers

E. all routers and switches

Answer: A

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