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Exam : Cisco 642-831
Title : CCNP's Cisco Internetwork Troubleshooting (CIT)


1. Which commands are used in Windows 2000 to display information that is used in an end-system configuration table? (Choose four.)
A. route print
B. ifconfig -a
C. arp /all
D. arp -a
E. ping [ip-address | hostname]
F. telnet [ip-address | hostname]
Answer: ADEF

2. Which command can reveal detailed connectivity problems between DTE equipment and the service provider's Frame Relay switch?
A. show frame-relay switch
B. debug frame-relay serial
C. debug frame-relay lmi
D. show frame-relay pvc
Answer: C

3. LAB
Do the configuration on the Management PC of Miami
Take notice, the router name and IP address will change in your real exam, Please understand these command.
Enanble and input the password ???cisco??��
Show cdp nei det??��find the ip address of S0 interfact of the middle router??
telnet 192.168.143.8(this address is the ip address of S0 interfact of the middle router)
Enanble and input the password ???cisco??�� (now you have telneted to the middle router)
conf t
router rip
net 192.168.143.0
net 172.16.0.0
exit
int s1
ip add 172.16.71.2 255.255.255.0
no shut
int s0
ip add 192.168.143.2 255.255.255.0
6. Which pieces of information would be relevant when creating an end-system network configuration table? (Choose four.)
A. routing protocol characteristics
B. operating system and version
C. IP address and subnet mask
D. network media type
E. DNS server address
F. default gateway address
Answer: BCEF

4. Over the past year the amount of traffic between certain access-layer network segments and the company's intranet website has increased dramatically. The CPU utilization levels of network devices and intranet server are well within acceptable limits. Congestion has been observed at the connection between the access-layer switches and the distribution layer, multilayer switches. What should be done to help eliminate congestion?
A. Upgrade access-layer switches to better performing models.
B. Implement QoS features on the access-layer switches.
C. Upgrade the end user Gigabit Ethernet links.
D. Increase the bandwidth on the upstream links from the access-layer switches.
E. Upgrade the distribution layer, multilayer switches to better performing models.
F. Implement QoS features on the distribution layer, multilayer switches.
Answer: D

5. In the diagram, the Frame Relay network is configured with EIGRP, and the entire network is in autonomous system 1. RTB and RTC are not receiving each other's routes. What is the solution?
A. Configure the auto summary command under router eigrp.
B. Issue the no ip split horizon command.
C. Configure subinterfaces on the spoke routers and assign different IP address subnets for each subinterface.
D. Check and change the access lists on RTA.
E. Issue the no ip split horizon EIRGP 1 command.
F. Configure a distribute list that allows the router to advertise all routes.
Answer: E

6. A problem at which OSI model layers can cause the following messages to be output on the console? (Choose two.)
Router#Mar 23 12:10:20: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial1/0, changed state to down Mar 23 12:10:20: %DUAL-5-NBRCHANGE: IP-EIGRP 101: Neighbor 172.21.177.1 (Serial1/0) is down: interface down
A. physical
B. data link
C. network
D. transport
E. session
F. application
Answer: AB

7. Which pieces of information would be relevant when creating an end-system network configuration table? (Choose four.)
A. routing protocol characteristics
B. operating system and version
C. IP address and subnet mask
D. network media type
E. DNS server address
F. default gateway address
Answer: BCEF

8. The above message appears on your console screen. Given this information, which statement is true?
A. The wrong peer is set on the crypto map.
B. The crypto algorithms do not match.
C. The DSS key is missing or invalid.
D. The IP address for the remote peer is incorrect.
Answer: B

9. A network administrator is developing network configuration documentation for a Layer 2 switch and is utilizing the above output to gather information. Which command did the administrator issue to receive this output?
A. show spanning-tree
B. show vlan
C. show interfaces capabilities
D. show interfaces trunk
E. show etherchannel summary
Answer: D

10. Refer to the command line output. What is a possible cause of the error message?Router# debug crypto ipsecIPSEC(validate_proposal): invalid local address 12.2.6.2ISAKMP (0:3): atts not acceptable. Next payload is 0ISAKMP (0:3): SA not acceptable!
A. The crypto map is applied to the incorrect interface.
B. The Phase 1 policy map does not match.
C. The remote peer IP address is incorrectly specified.
D. The IPSec transform proposals do not match.
Answer: A

11. Refer to the exhibit. An IPSec connection has failed between R2 and R3. What is the most likely cause of the problem?
A. The hash methods do not match.
B. The Diffie-Hellman group settings do not match.
C. Pre-shared keys do not match.
D. There is an invalid peer address.
Answer: C

12. Which command will enable forwarding of packets that have no default route to the best supernet route possible?
A. ip redirects
B. ip split-horizon
C. ip proxy-arp
D. ip classless
Answer: D

13. Refer to the exhibit. From router RTA, the administrator can telnet to switch SW2, but cannot telnet to switch SW1. On the basis of the information that is generated by the show cdp entry command, which layered-model troubleshooting statement is true?
A. The problem resides at Layer 1.
B. The problem resides at Layer 2.
C. The problem resides at Layer 3.
D. The problem resides at Layer 4 or higher.
E. There is an application layer problem with the Telnet program.
Answer: D

14. The real-time data has been experiencing heavy latency because of the amount of time it is taking to serialize the packets. The network is 512 kbps Frame Relay. Which two methods can be used to reduce the QoS problems? (Choose two.)
A. link fragmentation and interleaving
B. Frame Relay traffic shaping
C. low latency queuing
D. IP RTP header compression
E. traffic classification and policing
Answer: AD