Chapter 2

Question 1

what is the kernel?

Answer 1

portion of the OS that interacts directly with computer hardware

Question 2

what are the 3 parts of an operating system?

Answer 2

kernel, shell and CLI or GUI

Question 3

what is the shell?

Answer 3

portion that interfaces with applications and the user

Question 4

what do the CLI/GUI do?

Answer 4

provide an interface for the user to interact with the shell

Question 5

what is the CLI?

Answer 5

Command Line Interface used to communicate with the shell using textual commands on a keyboard

Question 6

what is a GUI?

Answer 6

Graphical User Interface used to communicate with the shell using graphical icons, menus, and windows (i.e. Windows, Linus, Android, Apple iOS)

more user friendly

Question 7

what does a PC operating system enable a user to do through a GUI?

Answer 7

• Use a mouse to make selections and run programs
• Enter text and text-based commands
• View output on a monitor

Question 8

what does a PC operating system enable a network technician to do through a CLI?

Answer 8

• Use a keyboard to run CLI-based network programs
• Use a keyboard to enter text and text-based commands
• View output on a monitor

Question 9

what is the console?

… port provides..

Answer 9

physical management port that provides out-of-band access to a Cisco device

Out-of-band access is access used for device maintenance purposes only

Question 10

what is a secure shell (SSH)?

• remotely establishing a … connection

Answer 10

secure in-band method for remotely establishing a secure CLI connection, through a virtual interface, over a network

Question 11

what is a telnet?

Unlike SSH…

Answer 11

insecure, in-band method of remotely establishing a CLI session, through a virtual interface, over a network

Question 12

what is the AUX port?

like the console…

Answer 12

AUX port is out-of-band and does not require networking services to be configured or available. (E.g. over a talephone line)

Question 13

what are terminal emulation programs?

Answer 13

programs you can use to connect to a networking device either by a serial connection over a console port, or by an SSH/Telnet connection

Question 14

list 3 ways

how do terminal emulation programs help enhance your productivity?

Answer 14

• adjusting window size
• changing font size
• changing colour schemes

Question 15

list 3

types of emulation programs

Answer 15

• PuTTY
• Tera Term
• SecureCRT

Question 16

list 2

what are the primary command modes?

Answer 16

• user exec mode
• privileged exec mode

Question 17

what happens in the user exec mode?

Answer 17

• limited capabilities but is useful for basic monitoring operations
• identified by “>”
• no device configuration done here

Question 18

what happens in the privileged exec mode?

Answer 18

• network administrator can execute configuration commands
• used to reach higher configuration modes
• identified by the prompt ending with “#”