Q.1 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
Ans : network layer
Q.2 Which of the following tasks is not done by data link layer?
A. framing
B. error control
C. flow control
D. channel coding
Ans : channel coding
Q.3 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
Ans : media access control sublayer
Q.4 Header of a frame generally contains ______________.
A. synchronization bytes
B. addresses
C. frame identifier
D. all of the above
Ans : all of the above
Q.5 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
Ans : logical link control sublayer
Q.6 When 2 or more bits in a data unit has been changed during the transmission, the error is called ____________.
A. random error
B. inverted error
C. double error
D. burst error
Ans : burst error
Q.7 CRC stands for __________.
A. cyclic redundancy check
B. code repeat check
C. code redundancy check
D. cyclic repeat check
Ans : cyclic redundancy check
Q.8 Which of the following is a data link protocol?
A. ethernet
B. point to point protocol
C. hdlc
D. all of the above
Ans : all of the above
Q.9 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
Ans : Both CSMA/CD & CSMA/CA
Q.10 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. parity check
D. fletcher’s checksum
Ans : piggybacking
