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Chapter 4
Cisco's Diagnostic Commands
Answers to Review Questions
1.
A, C, E, F, G, H. Path switching is a general term for the manner in
which packets get from the incoming interface to the outgoing inter-
face. Cut-over routing is not a valid term.
2.
C, D, E. Input and output are general terms as well; all hardware,
interface, and system buffers have input and output queues for direc-
tional buffering.
3.
A, C, E, F. Queue and controller commands are specific commands
for interfaces and global commands.
4.
A, B, C, D. All of these messages are displayed by the command.
5.
A, C, D. The command will not provide you with information regard-
ing the reason for the last upgrade nor the version of configuration
that resides on the router.
6.
C. The start-up configuration is held in the NVRAM memory.
7.
A. The running configuration is the configuration currently being run
by the router.
8.
A, B, C, D, E. Overruns and underruns deal with errors on interfaces.
Memory allocation errors are seen using the show memory command.
9.
C. show tech-support is the command that contains the informa-
tion requested by TAC.
10.
B. ARPA is the default encapsulation used by Cisco. The other three
are valid encapsulation types, but are not turned on by default.
11.
A, B, C, D. Layer 4 encapsulation is not included in the output of the
above command.
12.
A, B, C, D. The TTL timer is not shown in the show arp command.
13.
B, C, D. Memory information is not displayed via this command.
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