CCNA study notes on Cisco router commands

Cisco Certified Network Associate (CCNA)

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Cisco router commands

30. The following are some important commands that can be used to edit and review command history buffer on a Cisco router. It will be useful to practice these commands.

31. The following are some frequently used COPY commands:

32. The banner is displayed whenever anyone logs in to your Cisco router. The syntax is

"banner motd # " . MOTD stands for "Message Of The Day".

# symbol signifies the start of the banner message to the router. You will be prompted for the message to be displayed. You need to enter "#" symbol at the end of the message, signifying that the message has ended.

33. Router modes of operation:

34. You can use "tab" to complete the command that you are typing.

35. SHOW command is extensively used for seeing the status and configuration information of the router.

Some of the frequently used commands are:

36. The Cisco router can be configured from many locations.

37. There are five different types of passwords:

38. Internal memory components of a Cisco router:

39. While a packet travels through an Internetwork, it usually involves multiple hops. Note that the logical address (IP address) of source (that created the packet) and destination (final intended destination) remain constant, the hardware (Interface) addresses change with each hop.

40. Default administrative distances some important routing protocols are as below:

Route Source

Default Distance

Directly connect Interface

0

Static Route

1

IGRP

100

RIP

120

Unknown

255

An administrative distance of 0 represents highest trustworthiness of the route.

An administrative distance of 255 represents the lowest trustworthiness of the route.

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