Computer Networks CT-2

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

• network layer

• physical layer
  

• transport layer
  

• application layer

Automatic repeat request error management mechanism is provided by ________.

• media access control sublayer

• logical link control sublayer

• network interface control sublayer

• application access control sublayer

In a Go-Back-N ARQ, if the window size is 63, what is the range of sequence numbers?

• • 0 to 63

• • 0 to 64

• • 1 to 63

• • 1 to 64

ARQ stands for _______.

• • Automatic repeat quantization

• • Automatic retransmission request

• • Automatic repeat request

• • Acknowledge repeat request

_________framing uses two categories of protocols: character-oriented and bit-oriented.

• Variable-size

• Standard

• Fixed-size

• None of the above

Which of the following is a data link protocol?

• ethernet

• point to point protocol

• hdlc

• all of the mentioned

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

• cyclic redundancy check

• piggybacking

• fletcher’s checksum

• parity check

In ________ protocols, we use ________.

• • byte-oriented; bit stuffing

• • character-oriented; bit stuffing

• • bit-oriented; bit stuffing

• • none of the above

_______ control refers to a set of procedures used to restrict the amount of data that the sender can send before waiting for acknowledgment.

• Flow

• Error

• Transmission

• none of the above

The Simplest Protocol and the Stop-and-Wait Protocol are for ______ channels.

• • noiseless

• • noisy

• • either (a) or (b)

• • neither (a) nor (b)