Data Communication

Question 1

Define data communication

Answer 1

the transmission of digital data between 2 or more computers

Question 2

Name the components of data communication and define them

Answer 2

Message- the data to be communicated

Sender- the device that sends the message

Receiver- the device that gets the message

Transmission medium- the physical path by which a message travels from sender to receiver

Protocol- a set of rules that govern data communication. It represents an agreement between the communicating devices

Question 3

Examples of transmission medium?

Answer 3

1) twisted-pair wire
2) coaxial cable
3) fiber-optic cable
4)radio waves

Question 4

What are data communication devices

Answer 4

any type of hardware capable of transmitting data, instructions, and information between sending device and a receiving device

Question 5

examples of data communication?

Answer 5

1) modem
2) network interface card (NIC)
3) WiFi
4) Bluetooth devices
5) Infrared
6) Smartphones

Question 6

Modem is short for ?

Answer 6

modulator demodulator

Question 7

What is a modem?

Answer 7

a communicating device that is capable of sending & receiving a signal to allow computers to talk to other computers

Question 8

What are the two ways in which information can travel and what do they consist of

Answer 8

analog- consists of a continuous electrical wave

digital signal- consists of individual electrical pulses that represent groups of bytes

Question 9

Another name for a NIC?

Answer 9

network interface controller, network adapter or LAN adapter

Question 10

What is bluetooth

Answer 10

a wireless technology that allows the exchange of data between different devices

Question 11

Bluetooth uses _________ to transmit data. It only works within a ________ distance

Answer 11

wavelength, short

Question 12

What is infrared technology

Answer 12

a method of transferring data without the use of wires. (cordless)

Question 13

Give an example of an infrared (Ir) device

Answer 13

a tv remote

Question 14

Types of communicating software?

Answer 14

1) Internet forum
2) Email
3) Web conferencing
4) Video chat
5) Bulletin board system
6) Data conferencing
7) Instant messaging
8) Internet relay chat
9) Video conferencing

Question 15

Define network

Answer 15

a group of two or more computers linked together so that they can share resources and communicate with each other

Question 16

What are the types of computer network

Answer 16

Local area network
Wide area network
Personal area network
Metropolitan area network