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642-831 : Internetwork Troubleshooting (CIT)

QUESTION 11 You are the network administrator at Cisco Highway.com. You are currently troubleshooting connection oriented protocols on the Cisco Highway network. What would your targets be? (Choose all that apply.)

A. Verify protocol numbers

B. Verify time-to-live fields

C. Verify sequence numbers

D. Verify acknowledgment numbers

Answer: C, D Explanation: 1. Verify sequence number 2. Verify acknowledgment numbers

QUESTION 12 You are the network administrator at Cisco Highway.com. You need to trouble shoot network latency problems on the Cisco Highway network. Which document would save you time in learning about the structure and configuration of a network, as well as informing you that you have restored the network to its normal operation?

A. Design document

B. Baseline document

C. Network summary

D. Design summary

Answer: B

QUESTION 13 You are the network administrator at Cisco Highway.com. You have just followed the correct plan in an attempt to correct a problem on the Cisco Highway network. However, you were not successful. What should you do next?

A. Stop making changes and return to the Gathering Symptoms stage.

B. Continue to make changes, documenting each change as it is made until the problem is corrected.

C. Undo all changes, returning the device to their known initial state.

D. Perform a core dump to send to Cisco technical support for analysis.

Answer: C

QUESTION 14 You are a network technician at Cisco Highway.com. The network administrator asks you to gather information about MS Windows based end-systems. Which two commands would you use? (Choose all that apply.)

A. traceroute

B. route print

C. show route

D. print route

E. arp -a

F. show interface

Answer: B, E

Explanation: See Below From Win2000 Workstation: +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

C:\>route print =========================================================================== Interface List 0x1 ........................... MS TCP Loopback interface 0x1000003 ...00 d0 09 f4 32 a0 ...... NDIS 5.0 driver =========================================================================== ===========================================================================

Active Routes:
Network Destination Netmask Gateway Interface Metric
0.0.0.0 0.0.0.0 172.16.26.1 172.16.26.10 1
127.0.0.0 255.0.0.0 127.0.0.1 127.0.0.1 1
172.16.26.0 255.255.255.0 172.16.26.10 172.16.26.10 1
172.16.26.10 255.255.255.255 127.0.0.1 127.0.0.1 1
172.16.255.255 255.255.255.255 172.16.26.10 172.16.26.10 1
224.0.0.0 224.0.0.0 172.16.26.10                      172.16.26.10 1
255.255.255.255 255.255.255.255 172.16.26.10 172.16.26.10 1

Default Gateway: 172.16.26.1 =========================================================================== Persistent Routes: None C:\>arp -a Interface: 172.16.26.10 on Interface 0x1000003 Internet Address Physical Address Type 172.16.26.1 00-30-ab-04-2c-d5 dynamic C:\>

QUESTION 15 Which of the following items should be an integral part of a network topology diagram? (Choose all that apply.)

A. Individual end user systems.

B. Location of configuration files.

C. Illustrations of each network device.

D. Representations of logical and physical connections.

E. Speed and duplex of individual switch ports.

Answer: C, D

QUESTION 16 There are three destinations to which the Cisco router logging process can distribute error messages. What are these three destinations? (Choose all that apply.)

A. Message directory

B. External syslog server

C. Logging buffer

D. Terminal lines

E. History file

F. Configuration file Answer: B, C, D

QUESTION 17 Exhibit: This exhibit is an illustration of the output of a command that can be used to troubleshoot data-link targets. Which command is responsible for this output?

A. show interfaces serial 0/1

B. show cdp neighbor detail

C. show interfaces serial 0/1 summary

D. show cdp neighbor

Answer: B

QUESTION 18 You are a network technician at Cisco Highway. Your newly assigned Cisco Highway trainee wants to know what the P means in a trace output. What will your reply be?

A. The port us unreachable.

B. The packet is unreachable

C. The PSTN is unreachable.

D. The protocol is unreachable.

Answer: D

Explanation: The capital letter P is the message for protocol unreachable See URL: http://www.cisco.com/en/US/products

QUESTION 19 Which command would you utilise if you want to determine if a problem resides in the first four layers of the OSI networking model?

A. arp -a

B. show ip interface

C. telnet

D. ping

Answer: C

QUESTION 20 You are a technician at Cisco Highway Inc.you are required to troubleshoot the external router connections supporting the inter-VLAN routing. Which two steps should you take? (Choose all that apply.)

A. Ensure that the correct IP address if configured on the main interface.

B. Verify that the subinterface for each VLAN has the correct IP address.

C. Verify the correct media-type statement for each VLAN subinterface.

D. Ensure that the full duplex setting on the main router interface matches that on the switch port.

Answer: B, D Incorrect answers: A - there can only be one media type per physical interface C - the main interface (fasteth 0/0 for example) is to be left un-numbered

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