Chapter 4

Question 1

An interface that enables the user to interact with the operating system by entering commands and optional arguments

Answer 1

Command-line interface

Question 2

A part of the Cisco IOS Software CLI in which the user can type configuration commands that are then added to the device’s currently used configuration file (running-config).

Answer 2

Configuration-Mode

Question 3

A part of the Cisco IOS 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 router.

Answer 3

enable mode

Question 4

The operating system (OS) of Cisco routers and switches, which provides the majority of a router’s or switch’s features, with the hardware providing the remaining features.

Answer 4

Internetwork Operating System

Question 5

A Cisco operating system (OS) with a modern Linux-based multitasking software architecture used as the OS for many enterprise-class LAN switch and router products.

Answer 5

IOS XE

Question 6

For connections to the RJ-45 console port rather than USB console port of a Cisco device, the type of cable used between the user PC and the console port. The UTP rollover cable uses a rollover pinout with eight pins, connecting pin 1 to pin 8, pin 2 to pin 7, and so on.

Answer 6

rollover cable

Question 7

Stores the currently used configuration commands. This file changes dynamically when someone enters commands in configuration mode.

Answer 7

running-config file

Question 8

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 8

Secure Shell (SSH)

Question 9

In Cisco IOS switches and routers, the name of the file that resides in NVRAM memory, 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 9

startup-config file

Question 10

he standard terminal-emulation application layer protocol in the TCP/IP protocol stack. Telnet is 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. Telnet is defined in RFC 854.

Answer 10

Telnet

Question 11

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

Answer 11

user mode

Question 12

Global command that changes the context to console configuration mode.

Answer 12

line console 0

Question 13

command, Line (console and vty) configuration mode. Tells IOS to prompt for a password (no username).

Answer 13

login

Question 14

Line (console and vty) configuration mode. Sets the password required on that line for login if the login command (with no other parameters) is also configured.

Answer 14

password pass-value

Question 15

Global command that changes the context to interface mode—for example, interface FastEthernet 0/1.

Answer 15

interface type port-number

Question 16

Interface subcommand that sets the Ethernet interface speed on interfaces that support multiple speeds.

Answer 16

speed value

Question 17

Global command that sets this switch’s hostname, which is also used as the first part of the switch’s command prompt.

Answer 17

hostname name

Question 18

Command that moves back to the next higher mode in configuration mode.

Answer 18

exit

Question 19

Command that exits configuration mode and goes back to enable mode from any of the configuration submodes.

Answer 19

end

Question 20

This is not a command, but rather a two-key combination (pressing the Ctrl key and the letter Z) that together do the same thing as the end command.

Answer 20

Ctrl+Z

Question 21

Privileged mode EXEC command to disable all currently enabled debugs.

Answer 21

no debug all

undebug all

Question 22

Privileged mode EXEC command that reboots the switch or router.

Answer 22

reload

Question 23

Privileged mode EXEC command that saves the active config, replacing the startup-config file used when the switch initializes.

Answer 23

copy running-config startup-config

Question 24

Privileged mode EXEC command that merges the startup-config file with the currently active config file in RAM.

Answer 24

copy startup-config running-config

Question 25

Privileged mode EXEC command that lists the contents of the running-config file.

Answer 25

show running-config

Question 26

Privileged mode EXEC command that erases the startup-config file.

Answer 26

write erase
erase startup-config
erase nvram:

Question 27

EXEC command that disconnects the user from the CLI session.

Answer 27

quit

Question 28

Privileged mode EXEC command that lists the contents of the startup-config (initial config) file.

Answer 28

show startup-config

Question 29

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

Answer 29

enable

Question 30

Privileged mode EXEC command that moves the user from privileged mode to user mode.

Answer 30

disable

Question 31

Privileged mode EXEC command that moves the user into configuration mode.

Answer 31

configure terminal

Question 32

EXEC command that lists the contents of a switch forwarding (MAC) table.

Answer 32

show mac address-table