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Cisco CCNA 640-802试题(21-25)

2007-12-19 09:43 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(21-25)试题及答案。

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21. A company is installing IP phones. The phones and office computers connect to the same device. To ensure maximum throughput for the phone data, the company needs to make sure that the phone traffic is on a different network from that of the office computer data traffic. What is the best network device to which to directly connect the phones and computers, and what technology should be implemented on this device? (Choose two.)

A. hub
B. router
C. switch
D. STP
E. subinterfaces
F. VLAN

Answer: CF
 
22 Refer to the output from the show running-config command in the exhibit. What should the administrator do to
allow the workstations connected to the FastEthernet 0/0 interface to obtain an IP address?

A. Apply access-group 14 to interface FastEthernet 0/0.
B. Add access-list 14 permit any any to the access list configuration.
C. Configure the IP address of the FastEtherent 0/0 interface to 10.90.201.1.
D. Add an interface description to the FastEthernet 0/0 interface configuration.

Answer: C

23 Refer to the exhibit. Which statement describes DLCI 17?

A. DLCI 17 describes the ISDN circuit between R2 and R3.
B. DLCI 17 describes a PVC on R2. It cannot be used on R3 or R1.
C. DLCI 17 is the Layer 2 address used by R2 to describe a PVC to R3.
D. DLCI 17 describes the dial-up circuit from R2 and R3 to the service provider.

Answer: C

24 Refer to the exhibit. The networks connected to router R2 have been summarized as a 192.168.176.0/21 route and sent to R1. Which two packet destination addresses will R1 forward to R2? (Choose two.)

A. 192.168.194.160
B. 192.168.183.41
C. 192.168.159.2
D. 192.168.183.255
E. 192.168.179.4
F. 192.168.184.45

Answer: BE

25. Which routing protocol by default uses bandwidth and delay as metrics?

A. RIP
B. BGP
C. OSPF
D. EIGRP

Answer: D

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