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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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
Want to start getting into routers etc so looking at doing some cisco stuff?
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1. Refer to the exhibit. How many broadcast domains exist in the exhibited topology? Read more…
1. What are two recommended ways of protecting network device configuration files from outside network security threats? (Choose two.) Read more…
1. Which tables of EIGRP route information are held in RAM and maintained through the use of hello and update packets? (Choose two.)
A: neighbor table
B: SPF table
C: RTP table
D: topology table
E: query table
F: DUAL table
Correct Answers: A, D
2. A router learns about a remote network from EIGRP, OSPF, and a static route. Assuming all routing protocols are using their default administrative distance, which route will the router use to forward data to the remote network?
A: The router will use the static route.
B: The router will use the OSPF route.
C: The router will use the EIGRP route.
D: The router will load balance and use all three routes.
Correct Answers: A
3. What is one reason that WPA encryption is preferred over WEP?
A: A WPA key is longer and requires more special characters than the WEP key.
B: The access point and the client are manually configured with different WPA key values.
C: WPA key values remain the same until the client configuration is changed.
D: The values of WPA keys can change dynamically while the system is used.
Correct Answers: D
4. When a new trunk link is configured on an IOS based switch, which VLANs are allowed over the link?
A: By default, all defined VLANs are allowed on the trunk.
B: Each single VLAN, or VLAN range, must be specified with the switchport mode command.
C: Each single VLAN, or VLAN range, must be specified with the vtp domain command.
D: Each single VLAN, or VLAN range, must be specified with the vlan database command.
Correct Answers: A
