Question

A host sends five packets and receives three acknowledgments. The time is shown as hour:minute:seconds.

a. Segment 1 was sent at 0:0:00.

b. Segment 2 was sent at 0:0:05.

c. Ack for segments 1 and 2 received at 0:0:07.

d. Segment 3 was sent at 0:0:20.

e. Segment 4 was sent at 0:0:22. F. Segment 5 was sent at 0:0:27. G. Ack for segments 1 and 2 received at 0:0:45. H. Ack for segment 3 received at 0:0:65. Calculate the values of rttm, rtts, rttd, and rto if the original rto is 6 seconds. Did the sender miss the retransmission of any segment? Show which segments should have been retransmitted and when. Rewrite the events including the retransmission time

Answer 1

TCP timer is the timer and it implementation uses four timers. There are four timers are as follows:

1. Retransmission

2. Persistence

3. Keepalive

4. TIME_WAIT