Data Communication and Networks MCQs

Data Communication and Networks MCQs

These Data Communication and Networks multiple-choice questions and their answers will help you strengthen your grip on the subject of Data Communication and Networks. You can prepare for an upcoming exam or job interview with these Data Communication and Networks MCQs.
So scroll down and start answering.

1: At the end of the data character, one or two ____ bits are added to signal the end of the frame.

A.   Start

B.   Check

C.   Parity

D.   Stop

2: In a payback analysis, the ____ cost is a one-time cost that occurs in year 0.

A.   Operation and Maintenance

B.   Time-Adjusted

C.   Development

D.   Cumulative Time-Adjusted

3: The simplest modulation technique is ____ shift keying.

A.   Amplitude

B.   Frequency

C.   Phase

D.   Noise

4: In a(n) ____________________ data type, each data item is a collection of other data items.

A.   Structure

B.   Array

C.   Printing

D.   String

5: What is data communication?

A.   The process of converting analog data into digital format

B.   The process of exchanging data between two or more devices via transmission media

C.   The process of encrypting data for secure storage

D.   The process of organizing and managing data in databases

6: What is a network?

A.   A group of interconnected computers and servers in a single location

B.   A set of hardware components used to build a computer system

C.   A collection of devices connected together to share resources and information

D.   A type of data storage device

7: Which of the following is an example of a wired transmission medium used in data communication networks?

A.   Fiber-optic cable

B.   Wi-Fi

C.   Bluetooth

D.   Twisted-pair copper cable

8: What is a packet in the context of data communication?

A.   A unit of data that is transmitted over a network

B.   The physical device that connects a computer to a network

C.   The software that controls data flow in a network

D.   The network address of a device

9: Which network topology connects each device in a linear sequence?

A.   Bus topology

B.   Star topology

C.   Ring topology

D.   Linear topology

10: In data communication, what is latency?

A.   The time taken to transmit data over a network

B.   The delay between sending and receiving data

C.   The maximum data rate supported by a network

D.   The number of packets lost during transmission

11: Which network protocol is widely used for accessing and transferring files over the internet?



C.   FTP

D.   DNS

12: What does the term "bandwidth" refer to in data communication?

A.   The speed at which data is transmitted over a network

B.   The physical width of a network cable

C.   The maximum number of devices that can be connected to a network

D.   The amount of data that can be transmitted in a given time

13: Which layer of the OSI model is responsible for routing and forwarding data packets between networks?

A.   Physical layer

B.   Data link layer

C.   Network layer

D.   Transport layer

14: What is the primary function of a router in a computer network?

A.   To connect devices within a local area network (LAN)

B.   To transmit data packets within a single network

C.   To forward data packets between different networks

D.   To provide security and encryption for data transmission