You are using Select Repeat ARQ. but for GBN it will be

Sender window size $2^{m}-1$

m is number of bits.

Sender window size $2^{m}-1$

m is number of bits.

The Gateway to Computer Science Excellence

0 votes

Four bits are used for packed sequence numbering in a sliding window protocol used in a computer network. What is the maximum window size?

- $4$
- $8$
- $15$
- $16$

Answer given is $16$

+1 vote

Answer is 15.

As given, this is sliding window protocol so,in case consider Selective repeat:

Sender window size = Receiver window size

and

Sender window size + Receiver window size = sequence numbering(2^{4})

Let window size is N.

N+N= 2^{4}

N=2^{3}

window size=8.

If we consider GBN then the max window size (16-1) =15

So Max window size =15

52,345 questions

60,497 answers

201,858 comments

95,315 users