CSE 306 Module 1-Graded Assessment - Peer-to-Peer Protocols

Question 1

Given 3

bits for sequence numbers, what is the maximum sliding window size at the

receiver in Go Back 3 ARQ?

Answer: 7

Question 2

Given 3

bits for sequence numbers in Selective Repeat ARQ. If the sender already set

the sliding window size to be 4, what is the maximum sliding window size at the

receiver?

Answer:

None of the above 

3.

Question 3

Consider

Selective Repeat ARQ flow control protocol. In the following scenario, what

should be the value of frame number x

at receiver B?

Answer: 2

Question 4

In the

scenario above, what should be the value of frame number y at receiver B?

Answer: 7

Question 5

If the probability

of error is very low in a communication link, which of the following statements

is true about performance of ARQ protocol?

Answer:

Go-back-N

ARQ and Selective Repeat ARQ protocols have similar performance

Question 6

In peer-to-peer protocol, the purpose of Automatic Repeat Request is

Answer:

to ensure a sequence of information packet is delivered without errors or duplication despite transmission errors and losses

Question 7

Which of the basic elements of ARQ is associated with negative acknowledgement

Answer:

NAKs

Question 8

In Go-Back-N ARQ, a procedure where transmission of a new frame is begun before the completion of time of the previous frame transmission is called

Answer: Pipelining

Question 9

In Stop-and-Wait protocol, sequence number are not required

Answer:

False

Question 10

The disadvantage of Stop-and-Wait protocol

Answer:

All of the above