Question 1

What is the role of a sender in data communication?

Accepted Answer

The sender is any device that is capable of sending the data (message).

Answer

The sender is responsible for error detection in data.

Answer

The sender receives and processes the data.

Answer

The sender is a device that only forwards data.

Question 2

Which of the following best describes a digital signal?

Accepted Answer

A digital signal uses specific values to represent information, primarily 0 and 1.

Answer

A digital signal varies in amplitude only.

Answer

A digital signal utilizes an infinite range of values.

Answer

A digital signal is continuous in nature.

Question 3

In which type of topology are all nodes connected to a central hub?

Accepted Answer

Star topology.

Answer

Mesh topology.

Answer

Ring topology.

Answer

Bus topology.

Question 4

What is the function of a protocol in data communication?

Accepted Answer

A protocol is a set of rules that governs data communication.

Answer

A protocol is a network topology type.

Answer

A protocol is a type of data packet.

Answer

A protocol is a hardware component that transmits data.

Question 5

What does TCP stand for in networking?

Accepted Answer

Transmission Control Protocol.

Answer

Transmission Connection Protocol.

Answer

Transfer Control Protocol.

Answer

Transmission Control Process.

Question 6

What is the purpose of a MAC address in a Local Area Network (LAN)?

Accepted Answer

MAC addresses enable the unique identification of the device interface and the correct delivery of the data.

Answer

MAC addresses are used for assigning IP addresses.

Answer

MAC addresses encrypt the data being sent.

Answer

MAC addresses are temporary and revert to defaults.

Question 7

What is the main difference between AM and FM modulation?

Accepted Answer

AM varies the amplitude of the carrier signal, while FM varies the frequency.

Answer

AM varies the phase of the carrier signal, while FM varies the amplitude.

Answer

AM has higher bandwidth than FM.

Answer

AM is used for digital signals, while FM is used for analog signals.

Question 8

Which of the following is a disadvantage of using UDP?

Accepted Answer

UDP does not guarantee ordered delivery of data.

Answer

UDP is connection-oriented.

Answer

UDP is slower than TCP.

Answer

UDP provides reliable data delivery.

Question 9

What does DHCP stand for in networking?

Accepted Answer

Dynamic Host Configuration Protocol.

Answer

Direct Host Communication Protocol.

Answer

Dynamic Hardware Configuration Protocol.

Answer

Dynamic Hypertext Control Protocol.

Question 10

What is data communication primarily concerned with?

Accepted Answer

Transmitting data between communicating devices over transmission media.

Answer

Creating data visualizations.

Answer

Filtering data for analysis.

Answer

Storing data on a hard drive.

Question 11

Which component of data communication is responsible for sending the message?

Accepted Answer

Sender (Transmitter, Source)

Answer

Protocol

Answer

Receiver (Destination)

Answer

Message

Question 12

What is a protocol in the context of data communication?

Accepted Answer

An agreed-upon set of rules used for communication between sender and receiver.

Answer

A form of data encryption.

Answer

A type of network hardware.

Answer

A software application.

Question 13

Which type of signal varies continuously and can represent information like sound and temperature?

Accepted Answer

Analog Signal

Answer

Noise

Answer

Modulated Signal

Answer

Digital Signal

Question 14

What does bandwidth refer to in data communication?

Accepted Answer

A range of frequencies that can be transmitted over a network medium.

Answer

The amount of data stored on a server.

Answer

The speed of a network connection.

Answer

The time taken for data to travel.

Question 15

What is the main function of a modem in data communication?

Accepted Answer

To modulate and demodulate signals between digital and analog formats.

Answer

To encrypt data during transmission.

Answer

To store data permanently.

Answer

To act as a central server.

Question 16

In a star topology, how are nodes connected?

Accepted Answer

Each node is connected directly to a central network hub or switch.

Answer

Nodes are connected by wireless signals.

Answer

Nodes are connected in a circular fashion.

Answer

All nodes share a single cable.

Question 17

Which IP address class has a range starting with a binary pattern of '10'?

Accepted Answer

Class B networks

Answer

Class D networks

Answer

Class A networks

Answer

Class C networks

Question 18

What is the purpose of error detection in data communication?

Accepted Answer

To identify if data bits have been changed during transmission.

Answer

To enhance the quality of the audio signal.

Answer

To improve the speed of transmission.

Answer

To increase data storage capacity.

Question 19

Which layer of the OSI model is responsible for establishing and maintaining sessions across a network?

Accepted Answer

Session Layer

Answer

Transport Layer

Answer

Application Layer

Answer

Network Layer

Question 20

What is data communication?

Accepted Answer

The process of transmitting data between two or more communicating devices over some transmission media.

Answer

The process of encrypting data for security.

Answer

The process of storing data in a computer.

Answer

The process of printing data on paper.

Question 21

Which component is responsible for sending the data in a data communication system?

Accepted Answer

Sender (Transmitter, Source)

Answer

Communication Medium

Answer

Protocol

Answer

Receiver

Question 22

What type of signal uses discrete values to represent information?

Accepted Answer

Digital Signal

Answer

Carrier Signal

Answer

Modulated Signal

Answer

Analog Signal

Question 23

Which modulation technique varies the amplitude of the carrier signal?

Accepted Answer

Amplitude Modulation (AM)

Answer

Frequency Modulation (FM)

Answer

Phase Modulation (PM)

Answer

Pulse Code Modulation (PCM)

Question 24

What does bandwidth represent in data communication?

Accepted Answer

A range of frequencies measured in Hertz.

Answer

The amount of data sent in a time frame.

Answer

The speed of data transmission.

Answer

The distance data can travel.

Question 25

What is the function of a modem in data communication?

Accepted Answer

Modulate and demodulate signals.

Answer

Encrypt and decrypt data.

Answer

Store and retrieve data.

Answer

Connect devices directly without any transformation.

Question 26

What is the primary purpose of error detection in data transmission?

Accepted Answer

To identify altered data bits during transmission.

Answer

To increase the transmission speed.

Answer

To improve connection quality.

Answer

To compress data before sending.

Question 27

In which network topology are all nodes connected directly to a central hub?

Accepted Answer

Star Topology

Answer

Bus Topology

Answer

Ring Topology

Answer

Mesh Topology

Question 28

What is the role of TCP in the TCP/IP model?

Accepted Answer

Provide reliable, ordered delivery of data packets.

Answer

Send data without connection management.

Answer

Break data into smaller packets.

Answer

Encrypt data for secure transmission.

Question 29

Which of the following is NOT a type of encryption?

Accepted Answer

Public Key Retrieval

Answer

Digital Signature

Answer

Symmetric Key Encryption

Answer

Asymmetric Key Encryption

Related quizzes

Related quizzes