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Computer Networking MCQs

Study important topics of Computer Networking step by step with our well-organized Networking MCQs at JobExams. These questions cover IP Addressing, OSI Model, TCP/IP, network devices (like routers and switches), types of networks (LAN, WAN, MAN), protocols, and commands like ipconfig and many more. These MCQs are very helpful for IT-related job tests such as PPSC, NTS, FPSC, SPSC, BPSC, CSS, and for students preparing for computer science exams and interviews.

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1 Computer Networking MCQs

What is the main role of the Session Layer in the OSI model?

  • Packet routing
  • Flow control
  • Establish, manage, and terminate sessions
  • Error detection
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Correct Answer: C. Establish, manage, and terminate sessions

Explanation: The Session Layer is the fifth layer of the OSI (Open Systems Interconnection) model. Its ... Read More Details

2 Computer Networking MCQs

What does the Transport Layer do if a segment is lost during transmission (in TCP)?

  • Ignores it
  • Replaces it with random data
  • Requests retransmission
  • Forwards to the application layer
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Correct Answer: C. Requests retransmission

Explanation: In the Transport Layer of the OSI model, the protocol TCP (Transmission Control Protocol) is ... Read More Details

3 Computer Networking MCQs

Which Transport Layer protocol is best for real-time applications like video streaming?

  • TCP
  • FTP
  • UDP
  • SMTP
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Correct Answer: C. UDP

Explanation: UDP (User Datagram Protocol) is the best Transport Layer protocol for real-time applications such as ... Read More Details

4 Computer Networking MCQs

Which of the following ensures that data segments are delivered in order?

  • UDP
  • TCP
  • IP
  • ARP
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Correct Answer: B. TCP

Explanation: TCP (Transmission Control Protocol) is responsible for making sure that data segments are delivered in ... Read More Details

5 Computer Networking MCQs

What is used at the Transport Layer to uniquely identify applications on a host?

  • IP Address
  • MAC Address
  • Port Number
  • DNS Name
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Correct Answer: C. Port Number

Explanation: The Transport Layer uses a unique number called a Port Number to identify applications on ... Read More Details

6 Computer Networking MCQs

Which mechanism does the Transport Layer use to prevent data overflow at the receiver’s end?

  • Routing
  • Buffering
  • Flow control
  • CRC
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Correct Answer: C. Flow control

Explanation: The Transport Layer uses a technique called flow control to prevent the receiver from getting ... Read More Details

7 Computer Networking MCQs

What is a key feature of UDP in the Transport Layer?

  • Reliable delivery
  • Acknowledgments
  • Low overhead and no connection
  • Sequence numbers
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Correct Answer: C. Low overhead and no connection

Explanation: UDP (User Datagram Protocol) is a key protocol in the Transport Layer of the OSI ... Read More Details

8 Computer Networking MCQs

Which two protocols operate at the Transport Layer?

  • IP and ICMP
  • TCP and UDP
  • ARP and RARP
  • HTTP and HTTPS
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Correct Answer: B. TCP and UDP

Explanation: At the Transport Layer of the OSI model, the two most widely used protocols are ... Read More Details

9 Computer Networking MCQs

What is the function of TCP in the Transport Layer?

  • Provides connectionless communication
  • Provides unreliable transmission
  • Provides reliable, connection-oriented communication
  • Converts IP to MAC address
0 Comments
Correct Answer: C. Provides reliable, connection-oriented communication

Explanation: TCP (Transmission Control Protocol) is a key protocol at the Transport Layer of the OSI ... Read More Details

10 Computer Networking MCQs

What is the data unit called at the Transport Layer?

  • Segment
  • Packet
  • Frame
  • Bit
0 Comments
Correct Answer: A. Segment

Explanation: At the Transport Layer of the OSI model, the data unit is called a Segment.

A ... Read More Details

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