Page 435

Exam Essentials

389

Remember how to restore or upgrade an IOS image.

By using the

privileged-mode command copy tftp flash, you can restore or
upgrade a file from a TFTP (network) server to flash memory.

Remember what you must complete before you back up an IOS image to
a network server. Make sure you can access the network server, ensure
the network server has adequate space for the code image, and verify the
file naming and path requirement.

Remember how to save the configuration of a router. There are a couple
ways to do this, but the most common, as well as most tested, method is
copy

running-config startup-config.

Remember how to erase the configuration of a router.

Type the

privileged-mode command erase startup-config and reload the router.

Understand when you would use CDP. Cisco Discovery Protocol can
be used to help you document your network as well as troubleshoot your
network.

Remember the output from the show cdp neighbors command. The
show

cdp neighbors command provides the following information:

device ID, local interface, holdtime, capability, platform, and port ID.

Understand how to telnet into a router, keep your connection, but return
to your originating console. If you telnet to a router or switch, you can
end the connection by typing exit at any time. However, if you want to
keep your connection to a remote device but still come back to your orig-
inal router console, you can press the Ctrl

+Shift+6 key combination,

release it, and then press X.

Remember the command to verify your Telnet sessions. The command
show

sessions will provide you with all the sessions your router has to

other routers.

Remember how to build a static host table on a router. By using the
global configuration mode command ip host host_name ip_address,
you can build a static host table on your router.

Remember how to verify your host table on a router. You can verify
the host table with the show hosts command.

Understand when you would use the ping command. Packet Internet
Groper (Ping) uses ICMP echo request and ICMP echo replies to verify an
active IP address on a network.

www.sybex.com