Ch6-Using the Command-Line Interface

Question 1

The standard terminal-emulation application layer protocol in the TCP/IP protocol stack. Used for remote terminal connection, enabling users to log in to remote systems and use resources as if they were connected to a local system. Defined in RFC 854.

Answer 1

Telnet

Question 2

A TCP/IP application layer protocol that supports terminal emulation between a client and server, using dynamic key exchange and encryption to keep the communications private.

Answer 2

Secure Shell (SSH)

Question 3

A part of the Cisco CLI in which the user can use the most powerful and potentially disruptive commands on a router or switch, including the ability to then reach configuration mode and reconfigure the device

Answer 3

enable mode

Question 4

A mode of the user interface to a router or switch in which the user can enter only non-disruptive EXEC commands, generally just to look at the current status, but not to change any operational settings

Answer 4

user mode

Question 5

A part of the Cisco IOS software CLI in which the user can enter configuration commands that are then added to the device’s current operational configuration

Answer 5

configuration mode

Question 6

In Cisco IOS switches and routers, the name of the file that resides in NVRAM, holding the device’s configuration that will be loaded into RAM as the running-config file when the device is next reloaded or powered on

Answer 6

startup-config

Question 7

In Cisco IOS switches and routers, the name of the file that resides in RAM, holding the device’s currently used configuration

Answer 7

running-config

Question 8

Command reference:

What global command changes the context to console configuration mode?

Answer 8

line console 0

Question 9

Command reference:

Which command, used in line (console and vty) configuration mode, tells IOS to prompt the user for a password (no username)?

Answer 9

login

Question 10

Command reference:

Which command, used in line (console and vty) configuration mode, sets the password required on the line for login if the <b>login</b> command (with no other parameters) is also configured

Answer 10

password <i>pass-value</i>

Question 11

Command reference:

Which command, used in global configuration mode, changes the context to interface mode?

Answer 11

interface <i>type port-number<i></i></i>

Question 12

Command reference:

Which command, used in global configuration mode, sets the device’s hostname?

Answer 12

hostname <i>name</i>

Question 13

Command reference:

Moves back one mode (the next higher mode) in configuration mode

Answer 13

exit

Question 14

Command reference:

Exits configuration mode and goes back to enable mode from any of the configuration submodes

Answer 14

end

Question 15

Command reference:

Enable mode EXEC command to disable all currently enabled debugs

Answer 15

Any of:

no debug all
undebug all

Question 16

Command reference:

Enable mode EXEC command that reboots the switch or router

Answer 16

reload

Question 17

Command reference:

Enable mode EXEC command that saves the active config, replacing the startup-config file used when the device initializes

Answer 17

Any of:

copy running-config startup-config
copy run start

Question 18

Command reference:

Enable mode EXEC command that merges the startup-config file with the contents of the currently active config file in RAM

Answer 18

Any of:

copy startup-config running config
copy run start

Question 19

This command lists the contents of the running-config file

Answer 19

Any of:

show running-config
sh run

Question 20

These enable mode EXEC commands erase the startup-config file

Answer 20

Any of:

erase startup-config
write erase
erase nvram:

Question 21

EXEC command that disconnects the user from the CLI session

Answer 21

quit

Question 22

Command that moves the user from user mode to enable (privileged) mode and prompts for a password if one is configured

Answer 22

enable

Question 23

This command moves the user from enable mode to user mode

Answer 23

disable

Question 24

Enable mode command that moves the user into configuration mode

Answer 24

Any of:

configure terminal
conf t