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

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

• A. Framing
• B. Error control
• C. Flow control
• D. Channel coding

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. Deals with transmission of data packets to and from the network-interface card, and also to and from another remotely shared channel. the mac sublayer also prevents collision using protocols like csma/cd.
• D. Error control sublayer

Header of a frame generally contains ______________

• A. Synchronization bytes
• B. Addresses
• C. Frame identifier
• D. All of the mentioned

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

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

CRC stands for __________

• A. Cyclic redundancy check
• B. Code repeat check
• C. Code redundancy check
• D. Cyclic repeat check

Which of the following is a data link protocol?

• A. Ethernet
• B. Point to point protocol
• C. Hdlc
• D. All of the mentioned

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

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