Answers to the Chapter 2 Q&A Section 707
27
Name three possible problems that could prevent the command boot system tftp c2500-j-
l.112-14.bin 128.1.1.1 from succeeding.
The possible reasons include: 128.1.1.1 is not accessible through the network; there is no
TFTP server on 128.1.1.1; the file is not in the TFTP default directory; the file is
corrupted; a boot command could precede this boot command in the configuration file;
and the IOS referenced in the first boot command would be used instead.
28
Two different IOS files are in a router's Flash memory: one called c2500-j-l.111-3.bin and
one called c2500-j-l.112-14.bin. Which one does the router use when it boots up? How
could you force the other IOS file to be used? Without looking at the router configuration,
what command could be used to discover which file was used for the latest boot of the
router?
The first IOS file listed in the show flash command is the one used at reload time, unless
a boot system command is configured. The configuration command boot system flash
xyz123.bin would override the order in Flash memory. show version is the command
used to display the file name of the IOS for the latest reload of a router. The show version
output tells you the version, as well as the name of the file that was used at last reload time.
It is particularly difficult to find in the output of the command.
29
What does CDP stand for?
Cisco Discovery Protocol. CDP is proprietary and is not dependent on a particular Layer
3 protocol to be configured and working.
30
On what type of interfaces is CDP enabled by default? (Assume IOS versions 11.0 and
later.)
On all interfaces that support SNAP headers. These include LANs, Frame Relay, and
ATM.
31
What command can be used to provide as much detailed information as possible with
CDP?
show cdp neighbor detail.
32
Is the password required at the console the same one that is required when Telnet is used
to access a router?
No. The Telnet ("virtual terminal") password is not the same password, although many
installations use the same value.
33
How could a router administrator disable CDP?
The no cdp run command disables CDP for the entire router. The no cdp enable interface
subcommand disables it for just that interface.
34
Which IP routing protocols could be enabled using setup?
RIP and IGRP.
apA.fm Page 707 Monday, March 20, 2000 5:24 PM