QUESTION 121 Which command will you use to view a summary of all 3 layers on a BRI interface?

A. Show isdn status

B. Show isdn int

C. Show isdn l3

D. Show status isdn

Answer: A

Explanation: According to Cisco: To display the information about calls, history, memory, status, and Layer 2 and Layer 3 timers, use the show isdn EXEC command. In the exam the same material may be tested using different way of questionings. Watch out....

QUESTION 122 A systematic approach should work best when troubleshooting a network environment.

A. True only when you are running IOS to manage the network gears.

B. False

C. True only when CWSI is in use.

D. True

E. True only when all network gears are Cisco based

Answer: D Explanation: According to the technical documentation at CCO: When you're troubleshooting a network environment, a systematic approach works best. An unsystematic approach to troubleshooting can result in wasting valuable time and resources, and can sometimes make symptoms even worse. Define the specific symptoms, identify all potential problems that could be causing the symptoms, and then systematically eliminate each potential problem (from most likely to least likely) until the symptoms disappear.

QUESTION 123 Which command will you use to view current call information on your ISDN interface?

A. Show status isdn

B. Show isdn int

C. Show isdn active

D. Show isdn status

Answer: C

Explanation: According to Cisco: To display the information about calls, history, memory, status, and Layer 2 and Layer 3 timers, use the show isdn EXEC command. In the exam the same material may be tested using different way of questionings. Watch out....

QUESTION 124 Which of the following protocol is a layer 2, media independent, messaging protocol for Cisco devices to discover neighbor?

A. ISL

B. CDP

C. VTP

D. SPAN

Answer: B

Explanation: CDP stands for Cisco Discovery Protocol.

QUESTION 125 Which of the following command is equivalent to "show running-config"?

A. Run config

B. Sh Run Conf

C. Running conf

D. Show config

Answer: D

Explanation: To display the running configuration, use the show running-config command. For a list of commonly used CLI command please visit: this site

QUESTION 126 How do you display the current uptime of your router?

A. Show status

B. Show current

C. Show conf

D. Show version

Answer: D

Explanation: According to Cisco: The show version command displays the image type, version number, and function sets that identify the exact software that is running on your router. Also displayed is the current configuration register setting. In the exam the same material may be tested using different way of questionings. Watch out.

QUESTION 127 (Apart from show buffers pool, what should you do to identify the source of IOS buffer leak (fill in the blank):

Answer: show buffers old

Explanation: According to Cisco: Use the following commands to pinpoint the source of the buffer leak: show buffers old show buffers pool [pool name] [header] Because buffer leaks are Cisco IOS Software bugs, try upgrading to the latest version in your release train to fix known buffer leak bugs (for example, if you are running Cisco IOS Software release 11.2(14), upgrade to the latest 11.2(x) image).

QUESTION 128 You suspect there is no default gateway specified on switch or server in your LAN. What are the valid actions you should take (Choose all that apply)?

A. Check to make sure that the IP addresses are allocated dynamically.

B. Check to make sure that all servers and other end systems on the LAN have a default gateway specification.

C. Check whether there is a default gateway configured on the LAN switch.

D. If any of these devices does not have a default gateway specified, configure a default gateway using the IP address of a router interface on the directly connected LAN

Answer: B, C, D

QUESTION 129 Which of the following command can be used to write the modified configuration to Non-Volatile memory so the settings stay permanently?

A. Write nvram

B. Write memory

C. Save config

D. Save memory

Answer: B

Explanation: You need to write the settings to NVRAM, or you will lose them when you reset the router.

QUESTION 130 When you open a case with the TAC, the case is routed to the Customer Engineering Response Team based upon which of the following criteria (Choose all that apply)?

A. name of customer

B. monthly service plan

C. type of problem

D. priority level

Answer: C, D

Explanation: According to Cisco: The focal point of all Cisco software and hardware maintenance and support services is the Cisco TAC. The TAC is staffed by Customer Support Engineers (CSEs) who have experience with the Cisco product line and all aspects of data communications networking technology.