Q$.2$ A TCP Tahoe connection begins data transmission by the slow$-$start algorithm and uses segment

sequence numbering in place of byte sequence numbering. The segment sequence numbering starts with

$0,$ and all the segments received successfully $($including ACK segments$)$ except the segment with sequence

number $5,$ which is lost during transmission. The initial value of ssthresh is $10$ segments. Assume that the

congestion window is updated on receipt of every ACK segment. You can also assume that the timeout

period is sufficiently large so that, when a timeout occurs, all the acknowledgments sent by the receiver

are received by the sender if they are not lost.

$3+2+2=7M$

Draw the packet transmission timeline diagram for the TCP connection and answer the following

questions. Your answers must be in coherence with the diagram to get the credit.

i$)$ How many duplicate ACKs are received by the sender before the timeout event for the

segment with sequence number $5?$

ii$)$ What is the value of ssthresh right after the timeout event?

iii$)$ Once the retransmitted segment is successfully received by the receiver and the sender

receives its ACK, which sequence number segments does the sender transmits?