Exam Number/Code: 642-831
Exam name: Cisco Internetwork Troubleshooting (CIT)
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Mobile 642-831
THE TOTAL NUMBER OF QUESTIONS IS 256
QUESTION NO: 1 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
QUESTION NO: 2 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
642-831
QUESTION NO: 3 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
QUESTION NO: 4 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
642-831
Answer: D
QUESTION NO: 5 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
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QUESTION NO: 6 Which pieces of information would be relevant when creating
642-831
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: B, C, E, F
QUESTION NO: 7 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: A, D, E, F
QUESTION NO: 8 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
QUESTION NO: 9 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?
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