$3.$ For TCP end$-$to$-$end flow control, suppose the capacity of the receiver buffer is $10$ packets. Suppose the

packets that are being queued in the receiver buffer are packets $4,5,6,7,8,10,11.$ What is the advertised

window size the receiver sent to the sender$?$ Suppose packet $12$ is the last packet sent by the sender$.$

What$$s the effective window size at the sender$?$ Can the sender send out packet $13$ at this moment? How

about packet $14?$

$4.$ Consider a TCP Tahoe flow. Assume the initial TCP congestion window size is cwnd$=1$ packet,

ssthreshold$=10$ packet, and the sender sends out packets starting from packet $1.$ Suppose packet $5$ is lost

in its first transmission and will go through in subsequent try. All other packets will go through in their

first transmission. Plot the time line graph for this flow until the transmission of packet $15.$ You also need

to show the value of cwnd and ssthreshold in your time line figure. In your calculation, ignore the impact

from awnd $($i$.$e$.,$ we assume awnd is sufficiently large$)$ and assume TCP timeout is three times the RTT$.$

$5.$ What is the time line figure for a TCP Reno flow, given that all the other conditions are the same as in

question $2?$ You also need to show the value of cwnd and ssthreshold in your figure.