ITEC102_PART1_MIDTERM

Question 1

The transfer of data or information from one location to another is called data communication or data transmission

Answer 1

Data Communication

Question 2

The computer or device that is used for sending the data from one to location to other is called ________.

Answer 2

Transmitter

Question 3

In electronic data communication, computer is usually used as _________.

Answer 3

Transmitter

Question 4

The computer or device that receives the data is called _______.

Answer 4

Receiver

Question 5

The path or link through which data is transferred from sender to receiver is called ______.

Answer 5

Medium

Question 6

The data or information which is sent from sender to receiver is called _______.

Answer 6

Message

Question 7

It is the main element of data communication system, due to which data communication occur.

Answer 7

Message

Question 8

The path or link through which data is transferred from sender to receiver is called ______.

Answer 8

Medium

Question 9

Are the physical links through which signals are transferred.
these are also called bounded media.

Answer 9

Guided Media

Question 10

Commonly used guided media include coaxial cables, wire pairs and fiber-optic cables. ( true/ false )

Answer 10

true

Question 11

Are the logical links through which signal are transferred. these are the natural parts of environment that can be used to transfer signals in form of waves.

Answer 11

Unguided media

Question 12

Commonly used methods of transmission through unguided media are microwave and satellite transmission. ( true/false )

Answer 12

true

Question 13

The manner in which data is transmitted from one location to another is called ____ __________ _____.

Answer 13

Data communication modes

Question 14

Data is transmitted in only on direction.

Answer 14

Simplex mode

Question 15

A terminal can only send data and cannot receive it or it can only receive data but cannot send it.

in this mode, the flow of information is uni -directional.

Answer 15

Simplex mode

Question 16

it is not possible to confirm successful transmission of data. So it is rarely used for data communication

Answer 16

Simplex mode

Question 17

This mode is normally used form remote control devices in which one device can only send data and other can only receive data.

Answer 17

Simplex mode

Question 18

TV remote control is an example of simplex mode( true/false)

Answer 18

true

Question 19

Data can be transmitted in both directions , but only in one direction at a time.

therefore data can be sent and received alternatively

Answer 19

Half duplex mode

Question 20

it is possible to confirm the transmission of data in this mode.

Answer 20

half duplex mode

Question 21

this is normally used in wireless communication system

Answer 21

Half duplex mode

Question 22

Data can be transmitted in both directions at the same time. in this mode, no time wasted in changing direction of flow of data like half-duplex mode

therefore it is fastest and most efficient mode.

Answer 22

Full duplex mode

Question 23

Telephone communication is an example of full duplex mode ( true/false )

Answer 23

true

Question 24

Mobile phone communication is an example of full duplex mode ( true/false )

Answer 24

true

Question 25

Elements of data communication system ( 4 )

Answer 25

Transmitter or sender or source
Receiver or sink or destination
Medium
Message

Question 26

two main categories of data communication media

Answer 26

Guided Media
Unguided Media

Question 27

three different modes for transmitting data from one location to another / Data communication modes

Answer 27

Simplex mode
Half duplex mode
Full duplex mode