Data Link Layer Multiple Choice Questions & Answers

1. Automatic repeat request error management mechanism is provided by ________

a) logical link control sublayer

b) media access control sublayer

c) network interface control sublayer

d) application access control sublayer

Answer: logical link control sublayer

2. CRC stands for __________

a) cyclic redundancy check

b) code repeat check

c) code redundancy check

d) cyclic repeat check

Answer: cyclic redundancy check

3. The data link layer takes the packets from _________ and encapsulates them into frames for transmission.

a) network layer

b) physical layer

c) transport layer

d) application layer

Answer: network layer

4. The technique of temporarily delaying outgoing acknowledgements so that they can be hooked onto the next outgoing data frame is called ____________

a) piggybacking

b) cyclic redundancy check

c) fletcher’s checksum

d) parity check

Answer: piggybacking

5. Header of a frame generally contains ______________

a) synchronization bytes

b) addresses

c) frame identifier

d) all of the mentioned

Answer: all of the mentioned

6. When 2 or more bits in a data unit has been changed during the transmission, the error is called ____________

a) random error

b) burst error

c) inverted error

d) double error

Answer: burst error

7. Which of the following is the multiple access protocol for channel access control?

a) CSMA/CD

b) CSMA/CA

c) Both CSMA/CD & CSMA/CA

d) HDLC

Answer: Both CSMA/CD & CSMA/CA

8. Which of the following tasks is not done by data link layer?

a) framing

b) error control

c) flow control

d) channel coding

Answer: channel coding

9. Which of the following is a data link protocol?

a) ethernet

b) point to point protocol

c) hdlc

d) all of the mentioned

Answer: all of the mentioned

10. Which sublayer of the data link layer performs data link functions that depend upon the type of medium?

a) logical link control sublayer

b) media access control sublayer

c) network interface control sublayer

d) error control sublayer

Answer: media access control sublayer

11. Data link layer mainly deals with framing, error control and flow control.

a) true

b) false

Answer: true