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Cisco CCNA 640-802试题(1-5)

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(1-5)试题及答案。

AD:

1. What are two reasons that a network administrator would use access lists? (Choose two.)

A. to control vty access into a router

B. to control broadcast traffic through a router

C. to filter traffic as it passes through a router

D. to filter traffic that originates from the router

E. to replace passwords as a line of defense against security incursions

Answer: AC

2. A default Frame Relay WAN is classified as what type of physical network?

A. point-to-point

B. broadcast multi-access

C. nonbroadcast multi-access

D. nonbroadcast multipoint

E. broadcast point-to-multipoint

Answer: C

3. Refer to the exhibit. How many broadcast domains exist in the exhibited topology?

A. one

B. two

C. three

D. four

E. five

F. six 
Answer: C

4. A single 802.11g access point has been configured and installed in the center of a square office. A few wireless users are experiencing slow performance and drops while most users are operating at peak efficiency. What are three likely causes of this problem? (Choose three.)

A. mismatched TKIP encryption

B. null SSID

C. cordless phones

D. mismatched SSID

E. metal file cabinets

F. antenna type or direction

Answer: CEF

5. Refer to the exhibit. What two facts can be determined from the WLAN diagram? (Choose two.)

A. The area of overlap of the two cells represents a basic service set (BSS).

B. The network diagram represents an extended service set (ESS).

C. Access points in each cell must be configured to use channel 1.

D. The area of overlap must be less than 10% of the area to ensure connectivity.

E. The two APs should be configured to operate on different channels.

Answer: BE

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