Implementing Cisco Unified Wireless Networking Essentials
Exam Number: 640-721
Associated Certifications: CCNA Wireless
Duration: 90 minutes (65 questions)
Available Languages: English
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This is the eBook version of the printed book.Cisco Networking Academy Program CCNA 1 and 2 Companion Guide, 3rd Edition
The only authorized textbook for use in the Cisco Networking Academy Program CCNA 1 and 2 courses
* Maps to revised 3.0 web-based curriculum
* Expanded chapters on difficult topics
* Expanded CD-ROM that includes CCNA practice questions, e-Labs, PhotoZooms, and more
* Additional chapters not included in the online course
For use within the CCNA 1 and 2 courses, this Companion Guide maps directly to the new curriculum and is considered the core textbook of the course. It presents the students with strong pedagogy and learning aids. In addition, the book goes beyond the web-based course with enhanced chapters on more difficult subjects, such as VLSM, cabling, and ripV2. The companion CD-ROM includes more than 300 CCNA practice questions, e-Lab Activities, PhotoZooms of equipment, and nstructional videos.
Download Cisco Networking Academy Program CCNA 1 and 2 Companion Guide, 3rd Edition
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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
Correct Answers: A, C
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
Correct Answers: 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
Correct Answers: C, E, F
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.
Correct Answers: E
5. Which type of attack is characterized by a flood of packets that are requesting a TCP connection to a server?
A: denial of service
B: brute force
C: reconnaissance
D: Trojan horse
Correct Answers: 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
Correct Answers: B, C
7. For security reasons, the network administrator needs to prevent pings into the corporate networks from hosts outside the internetwork. Which protocol should be blocked with access control lists?
A: IP
B: ICMP
C: TCP
D: UDP
Correct Answers: B
8. What are two recommended ways of protecting network device configuration files from outside network security threats? (Choose two.)
A: Allow unrestricted access to the console or VTY ports.
B: Use a firewall to restrict access from the outside to the network devices.
C: Always use Telnet to access the device command line because its data is automatically encrypted.
D: Use SSH or another encrypted and authenticated transport to access device configurations.
E: Prevent the loss of passwords by disabling password encryption.
Correct Answers: B, D
9. Which spread spectrum technology does the 802.11b standard define for operation?
A: IR
B: DSSS
C: FHSS
D: DSSS and FHSS
E: IR, FHSS, and DSSS
Correct Answers: B
14. 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
Correct Answers: B, E
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