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Appendix A
Practice Exam
12.
C. EIGRP routes have a default administrative distance
of 90.
13.
B, D. The show ip bgp neighbor command displays all the adver-
tised routes, and the show ip bgp command looks at all the
connections.
14.
D. If you write out the networks 172.16.100.0/24 and 172.16.106.0/
24 in binary and see how many leading bits that they have in common,
you will find that the first 20 bits are the same for both networks. If
you then convert these 20 bits back into decimal, you will have the
address of the summarized route.
15.
A and B. In an OSPF network, there must always be a backbone
area, which is numbered as Area 0. If a router has any of its interfaces
connected to Area 0, that router is said to be a backbone router.
16.
A, B, C, E, F. Access lists, snapshot routing, compression tech-
niques, Dial-on-Demand Routing (DDR), and incremental updates all
can help reduce bandwidth usage.
17.
A. The
show ip protocols
command will display such information
as redistribution parameters.
18.
B. The command
no auto-summary
is a router-
configuration command that disables the automatic summarization
of routes.
19.
C. Classless routing protocols send prefix routing information with
each update.
20.
B. The other options are invalid syntax.
21.
D. The
show bgp neighbors
command shows the configured BGP
peers and the current connection status as shown above.
22.
C. A transit AS is an AS through which data from one AS must travel
to get to another AS.
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