UGC NET · PAPER 2
UGC NET Paper 2 Computer Science – Unit 9: Data Communication and Computer Networks PYQ (22 June 2026)
Q59. Identify the incorrect statements from the following regarding the protocols used in the TCP/IP protocol suite.
A. IP is a reliable connection less protocol.
B. ARP is used to find the physical address of a node given its logical address.
C. ICMP is used to send notification of datagram problems to the recipient of the message.
D. IGMP is used to facilitate simultaneous transmission of a message to a group of recipients.
Choose the correct answer from the options given below:
A. IP is a reliable connection less protocol.
B. ARP is used to find the physical address of a node given its logical address.
C. ICMP is used to send notification of datagram problems to the recipient of the message.
D. IGMP is used to facilitate simultaneous transmission of a message to a group of recipients.
Choose the correct answer from the options given below:
- B and D only
- D only
- A and C only
- A, C and D only
Q61. Choose the correct order for the following sequence in the context of OSI layers (from bottom to top)
A. Transforming the datagrams into frame for transmission
B. Transmission of bits over communication channel
C. Handling user interface
D. Control and monitoring of subnet
E. Transmission of data using either connection-oriented or connection-less protocol
Choose the correct answer from the options given below:
A. Transforming the datagrams into frame for transmission
B. Transmission of bits over communication channel
C. Handling user interface
D. Control and monitoring of subnet
E. Transmission of data using either connection-oriented or connection-less protocol
Choose the correct answer from the options given below:
- A B C D E
- B C D E A
- B A D E C
- A B D E C
Q77. Match the LIST-I with LIST-II.
Choose the correct answer from the options given below:
| LIST-I (SMTP Response Code) | LIST-II (Description) |
|---|---|
| A. 214 | I. Service Ready |
| B. 421 | II. Transaction Failed |
| C. 220 | III. Help message |
| D. 554 | IV. Service Not Available |
- A-III, B-IV, C-I, D-II
- A-IV, B-III, C-I, D-II
- A-IV, B-I, C-III, D-II
- A-II, B-I, C-IV, D-III
Q86. Which of the following technologies enables the creation of virtual servers in a cloud computing environment?
- DNS Server
- Hypervisor
- Firewall
- Load Balancer
Q94. Match the LIST-I with LIST-II
Choose the correct answer from the options given below:
| LIST-I | LIST-II |
|---|---|
| A. Data link layer | I. Encryption |
| B. Network layer | II. Connection Control |
| C. Transport layer | III. Routing |
| D. Presentation layer | IV. Framing |
- A-IV, B-III, C-I, D-II
- A-III, B-IV, C-II, D-I
- A-IV, B-II, C-III, D-I
- A-IV, B-III, C-II, D-I
Q100. What is the maximum bit rate of a noiseless channel with a bandwidth of 2 KHz, transmitting a signal with 8 levels?
- 12000 bps
- 16000 bps
- 4000 bps
- 32000 bps
Q107. The one way propagation delay for a single bit of information (travelling at the speed of light i.e. 3×108 meters per second) over a fiber optic cable from point A to point B, 12000 kilometers apart would be :
- 20 ms
- 5 ms
- 50 ms
- 40 ms
Q111. The problem(s) in piggybacking acknowledgement frames is :
A. There is no need to send separate acknowledgement frames
B. It requires more bandwidth
C. To ascertain, how long the data link layer must wait for a packet onto which the acknowledgement is attached
D. Numbers of acknowledgement frames decrease
Choose the correct answer from the options given below :
A. There is no need to send separate acknowledgement frames
B. It requires more bandwidth
C. To ascertain, how long the data link layer must wait for a packet onto which the acknowledgement is attached
D. Numbers of acknowledgement frames decrease
Choose the correct answer from the options given below :
- A and D only
- B only
- B and C only
- C only
Q117. Choose the right sequence of stages for data transmission using CSMA/CD.
A. If the channel is clear, the sender sends the data.
B. The sender senses the channel for activity.
C. The sender waits for a random back off time before retransmitting.
D. Collision detection occurs if two devices transmit at the same time.
Choose the correct answer from the options given below :
A. If the channel is clear, the sender sends the data.
B. The sender senses the channel for activity.
C. The sender waits for a random back off time before retransmitting.
D. Collision detection occurs if two devices transmit at the same time.
Choose the correct answer from the options given below :
- A, B, D, C
- B, A, D, C
- B, A, C, D
- C, B, A, D
Q118. Which of the following is/are true for UDP protocol?
A. It is called Uniform Data Protocol
B. It is called User Datagram Protocol
C. It belongs to Transport Layer
D. It belongs to Network Layer
Choose the correct answer from the options given below:
A. It is called Uniform Data Protocol
B. It is called User Datagram Protocol
C. It belongs to Transport Layer
D. It belongs to Network Layer
Choose the correct answer from the options given below:
- A and C only
- B and C only
- A and D only
- B and D only
Q123. Match List - I with List - II.
Choose the correct answer from the options given below:
| List - I | List - II |
|---|---|
| A. SMTP | I. Network layer |
| B. UDP | II. Transport layer |
| C. Ethernet | III. Application layer |
| D. IP | IV. Data Link layer |
- A-I, B-II, C-III, D-IV
- A-III, B-II, C-IV, D-I
- A-II, B-III, C-IV, D-I
- A-I, B-II, C-IV, D-III
Q131. Arrange the following in the correct order in the context of OSI model (from bottom to top):
A. Network layer
B. Physical layer
C. Presentation layer
D. Data link layer
E. Application layer
Choose the correct answer from the options given below:
A. Network layer
B. Physical layer
C. Presentation layer
D. Data link layer
E. Application layer
Choose the correct answer from the options given below:
- D, A, C, B, E
- A, C, E, B, D
- B, D, A, C, E
- C, A, B, E, D