Data Communication Models: A Comprehensive Guide for Computer Network Administration

Question 1

In the OSI model, which layer is tasked with managing network addressing and routing?

Accepted Answer

Network

Answer

Application

Answer

Transport

Answer

Data Link

Question 2

What is the primary responsibility of the TCP protocol in the TCP/IP model?

Accepted Answer

Flow control and reliable data delivery

Answer

Network addressing and routing

Answer

Application-specific services

Answer

Error detection and correction

Question 3

Describe the fundamental difference between synchronous and asynchronous data transmission.

Accepted Answer

Synchronous transmission requires a clock signal, while asynchronous transmission does not.

Answer

Asynchronous transmission requires a clock signal, while synchronous transmission does not.

Answer

Synchronous transmission is inherently faster than asynchronous transmission.

Answer

Asynchronous transmission offers greater reliability compared to synchronous transmission.

Question 4

What is the purpose of utilizing a checksum in data transmission?

Accepted Answer

To detect errors in the transmitted data

Answer

To rectify errors in the transmitted data

Answer

To encrypt the transmitted data

Answer

To compress the transmitted data

Question 5

Which of the following is NOT an advantage of fiber optic cables over copper cables?

Accepted Answer

Lower cost

Answer

Greater bandwidth capacity

Answer

Reduced signal attenuation

Answer

Immunity to electromagnetic interference

Question 6

What is the primary purpose of a repeater in a network?

Accepted Answer

To regenerate and retransmit data signals

Answer

To provide additional security measures

Answer

To convert data from one format to another

Answer

To store data for future retrieval

Question 7

Explain the difference between a hub and a switch.

Accepted Answer

A hub broadcasts data to all ports, while a switch forwards data only to the intended port.

Answer

A switch broadcasts data to all ports, while a hub forwards data only to the intended port.

Answer

A hub is a more complex device than a switch.

Answer

A switch is generally more expensive than a hub.

Question 8

Which of the following is NOT a layer in the OSI model?

Accepted Answer

Bitwise

Answer

Physical

Answer

Session

Answer

Transport

Question 9

Describe the primary function of the data link layer in the OSI model.

Accepted Answer

To provide physical addressing and error detection

Answer

To establish and manage network connections

Answer

To provide flow control and reliable data delivery

Answer

To provide application-specific services

Question 10

In the OSI model, which layer is responsible for error detection and correction during data transmission?

Accepted Answer

Data Link layer

Answer

Physical layer

Answer

Transport layer

Answer

Application layer

Question 11

Which layer of the TCP/IP model is equivalent to the Application layer in the OSI model?

Accepted Answer

Application layer

Answer

Network access layer

Answer

Transport layer

Answer

Internet layer

Question 12

What is the primary purpose of the encapsulation process in data communication?

Accepted Answer

To add header and trailer information to each data unit

Answer

To break down data into smaller units for transmission

Answer

To ensure data integrity during transmission

Answer

To encrypt data for security purposes

Question 13

Which of the following is NOT a type of network topology?

Accepted Answer

Linear topology

Answer

Bus topology

Answer

Ring topology

Answer

Star topology

Question 14

What is the role of a protocol in data communication?

Accepted Answer

To define rules and procedures for data exchange

Answer

To encrypt data for secure transmission

Answer

To regulate the flow of data between devices

Answer

To compress data for efficient transmission

Question 15

Which of the following is a benefit of using a layered model in data communication?

Accepted Answer

Modularity and ease of troubleshooting

Answer

Increased data security

Answer

Improved network performance

Answer

Reduced network complexity

Question 16

What is the primary function of the physical layer in the OSI model?

Accepted Answer

Establish and maintain physical connections

Answer

Control data flow and error correction

Answer

Provide an interface for application programs

Answer

Manage network routing and addressing

Question 17

Which TCP/IP layer is responsible for providing a reliable, connection-oriented service?

Accepted Answer

Transport layer

Answer

Network interface layer

Answer

Internet layer

Answer

Application layer

Question 18

What is the primary purpose of the TCP/IP model in computer networking?

Accepted Answer

To provide a framework for the design and implementation of network protocols and applications

Answer

To regulate the flow of data across a network

Answer

To define the physical connections between devices on a network

Question 19

In the OSI model, which layer is responsible for providing services directly to user applications?

Accepted Answer

Application Layer

Answer

Session Layer

Answer

Presentation Layer

Answer

Transport Layer

Question 20

Which of the following is NOT a layer in the TCP/IP model?

Accepted Answer

Presentation Layer

Answer

Application Layer

Answer

Internet Layer

Answer

Transport Layer

Question 21

In the OSI model, which layer is responsible for ensuring reliable data transmission between devices?

Accepted Answer

Transport Layer

Answer

Network Layer

Answer

Data Link Layer

Answer

Application Layer

Question 22

Which layer of the OSI model is primarily responsible for error detection and correction in data transmission?

Accepted Answer

Data Link Layer

Answer

Network Layer

Answer

Transport Layer

Answer

Application Layer

Question 23

In the OSI model, which layer is responsible for establishing, managing, and terminating communication sessions between devices?

Accepted Answer

Session Layer

Answer

Transport Layer

Answer

Presentation Layer

Answer

Application Layer

Question 24

Which of the following is an example of a protocol that operates at the Application Layer of the TCP/IP model?

Accepted Answer

HTTP

Answer

ARP

Answer

IP

Answer

TCP

Question 25

What is a key advantage of using a layered data communication model?

Accepted Answer

It facilitates modular design, protocol independence, and easier troubleshooting

Answer

It guarantees high-speed data transmission

Answer

It eliminates the need for specialized network devices