a) A host uses TCP to send a 100 Kbytes file. Assume all the segments have size 1Kbytes (not including the IP and TCP headers). Thus, if there were no losses it would take exactly 100 segments to send the entire file. However, due to congestion, three segments are lost: the 2nd, the 50th, and the 98th segment sent by the sender. (Note that due to retransmission(s), the 50th sent segment is not the 50th chunk of the file.) No other segments are lost. Plot the congestion window (cwnd) versus time for TCP Reno. Make sure that you specify the size of cwnd when a packet loss occurs, size of slow start threshold (ssthresh), and label the diagrams with slow start, AIMD, fast retransmit, and retransmission timeout where appropriate. Assume cwnd is measured in segments. (7 marks)