ccna考试题库.doc

1. What are two reasons that work 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 work?
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 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. chednull SSID
C. cordless phones
D. mismat SSID
E. metal file s
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. work 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
6. mand frame-relay map ip 102 broadcast was entered on the router. Which of the following statements is true concerning mand?
A. mand should be executed from the global configuration mode.
B. The IP address is the local router port used to forward data.
C. 102 is the remote DLCI that will receive the information.
D. mand is required for all F