Answers to Review Questions
249
15.
C. If you are using setup mode, which you really shouldn't be doing,
the square brackets indicate the current or default commands.
16.
C. If you delete the startup-config and reload the router, the router
will automatically enter setup mode. You can also type setup from
privileged mode at any time.
17.
A, D, E, F. RAM is used to store the packet buffers, ARP cache, and
routing tables as well as the running-config.
18.
C. The
show
history command will display the last 10 commands
entered by default. You can change the amount of commands dis-
played with the terminal history size command.
19.
C. By typing an IP address on an interface and then typing no
shutdown
on the interface, the router's interface will be enabled with IP.
20.
D. Both the
show
cdp neighbors detail command (discussed in
Chapter 7) and the command show ip interface will show you an
interface's layer-3 information. However, the show cdp neighbors
command only displays information about one interface, and show ip
interface
displays information about all interfaces on a router. The
question stated "interfaces," not interface.
21.
B. From the
line
console 0 command, you can then set the user-
mode console password.
22.
C. The
line
console 0 command will allow you to set the user-
mode console password. You cannot type line console0; you must
have a space between console and 0.
23.
B, C. The enable password is not encrypted by default; however, the
enable secret is encrypted by default.
24.
C. You can enter setup mode by erasing the configuration and reboot-
ing the router or by typing setup from privileged mode.
25.
A. If you see that a serial interface and the protocol are both down,
then you have a Physical layer problem.
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