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642-902 Exam
implementing cisco ip routing
Exam Number/Code : 642-902
Exam Name : implementing cisco ip routing
Questions and Answers : 470 Q&As
Update Time: 2010-08-11

5. Router R1 has been configured with the commands router eigrp 9 and network 172.16.2.0 0.0.0.255, with no other current EIGRP configuration. R1’s (working) Fa0/0 interface has been configured with IP address 172.16.2.2/26. R1 has found three EIGRP neighbors reachable via interface Fa0/0, including the router with IP address 172.16.2.20. When the engineer attempts to add the neighbor 172.16.2.20 fa0/0 command in EIGRP configuration mode, which of the following occurs?
A. Fa0/0 fails.
B. The command is rejecteD.
C. The existing three neighbors fail.
D. The neighborship with 172.16.2.20 fails and then reestablishes.
E. None of the other answers is correct.
Answer: C

7. An engineer has added the following configuration snippet to an implementation planning document. The configuration will be added to Router R1, whose Fa0/0 interface connects to a LAN to which Routers R2 and R3 also connect. R2 and R3 are already EIGRP neighbors with each other. Assuming the snippet shows all commands on R1 related to EIGRP authentication, which answer lists an appropriate comment to be made during the implementation plan peer review?
key chain fred
key 3
key-string whehew
interface fa0/0
ip authentication key-chain eigrp 9 fred
A. The configuration is missing one authentication-related configuration commanD.
B. The configuration is missing two authentication-related configuration commands.
C. Authentication type 9 is not supported; type 5 should be used insteaD.
D. The key numbers must begin with key 1, so change the key 3 command to key 1.
Answer: A

6. Which of the following settings could prevent two potential EIGRP neighbors from becoming neighbors? (Choose two answers.)
A. The interface used by one router to connect to the other router is passive in the EIGRP process.
B. Duplicate EIGRP router IDs.
C. Mismatched Hold Timers.
D. IP addresses of 10.1.1.1/24 and 10.2.2.2/24, respectively.
Answer: AD

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