Question $3(100$ points$)$:

Assume that we want to send $4$ packets of a $1000$ byte each. Assume that packet $3$

was lost in the first attempt

a$)$ Draw flow diagram that shows the use of simple protocol to send the packets

b$)$ Draw flow diagram that shows the use of stop and wait protocol to send the

packets $-$

c$)$ Draw flow diagram that shows the use of go back $N$ protocol to send the

packets $-$ assume $N$ is $4$

d$)$ Draw flow diagram that shows the use of selective repeat protocol to send

the packets $-$ assume window size is $8.$

e$)$ Which protocol took shorter time to finish the task $-$ sort them in ascending

order