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 2. Router R1 has working interfaces S0/0, S0/1, and S0/2, with IP address/prefix
combinations
of 10.10.10.1/24, 10.10.11.2/24, and 10.10.12.3/22. R1’s configuration includes
the commands router eigrp 9 and network 10.0.0.0. The show ip eigrp interfaces
command lists S0/0 and S0/1 in the command output, but not S0/2.Which answer
gives the reason for the omission? (Choose two answers.)
A. R1 has EIGRP neighbors reachable via S0/0 and S0/1, but not via S0/2, so it
is not includeD.
B. S0/2 may currently be in a state other than up/up.
C. The network 10.0.0.0 command requires the use of mask 255.0.0.0 due to
EIGRP being classful by default.
D. S0/2 may be configured as a passive interfacE.
Answer: B
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Explanation: The show ip eigrp interfaces command displays working (up/up) interfaces
on
which EIGRP has been enabled but omits passive interfaces. A failure of the interface,
or making the interface passive, would omit the interface from the output of this
commanD.
3. Routers R1 and R2 are EIGRP neighbors using their Fa0/0 interfaces, respectively. An
engineer adds the ip hello-interval eigrp 9 6 command to R1’s Fa0/0 configuration.
Which of the following is true regarding the results from this change?
A. The show ip eigrp neighbors command on R1 lists the revised Hello timer.
B. The show ip eigrp interfaces command on R1 lists the revised Hello timer.
C. The R1-R2 neighborship fails due to Hello timer mismatcH.
D. The show ip eigrp interfaces detail command on R1 lists the revised Hello
timer.
Answer: D
Explanation: The show ip eigrp interfaces detail command does display a router’s EIGRP
Hello
timer setting for each enabled interfacE. The other listed commands do not display
the timer. Also, EIGRP routers do not have to have matching Hello timers to become
neighbors.
4. Routers R1 and R2, currently EIGRP neighbors over their Fa0/0 interfaces (respectively),
both use EIGRP authentication. Tuesday at 8 p.m. the neighborship fails.
Which of the following would not be useful when investigating whether authentication
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had anything to do with the failure?
A. debug eigrp packet
B. show key chain
C. show ip eigrp neighbor failure
D. show clock
Answer: C