Cisco CCNA

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Cisco CCNA Certification Exam 642-812  plays an important role on your way to get the Cisco CCNA Certified Network Associate.

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There are Cisco CCNA 640-802 answer 1-6.You can buy the new Cisco CCNA Pass

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. 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

4. The command frame-relay map ip 10.121.16.8 102 broadcast was entered on the router. Which of the following
statements is true concerning this command?
A. This command should be executed from the global configuration mode.
B. The IP address 10.121.16.8 is the local router port used to forward data.
C. 102 is the remote DLCI that will receive the information.
D. This command is required for all Frame Relay configurations.
E. The broadcast option allows packets, such as RIP updates, to be forwarded across the PVC.
Answer: E

5. Which type of attack is characterized by a flood of packets that are requesting a sytem TCP connection to a server?
A. denial of service
B. brute force
C. reconnaissance
D. Trojan horse
Answer: A

6. Which of the following are associated with the application layer of the OSI model? (Choose two.)
A. ping
B. Telnet
C. FTP
D. TCP
E. IP
Answer: BC