TCP sequence and ACK numbers with segment loss
Consider the figure below in which a TCP sender and receiver communicate over a connection in which the sender->receiver segments may be lost. The TCP sender sends an initial window of 3 segments. Suppose the initial value of the sender->receiver sequence number is 385 and the first 3 segments each contain 505 bytes. The delay between the sender and receiver is 7 time units, and so the first segment arrives at the receiver at t=8. As shown in the figure below, 1 of the 3 segment(s) are lost between the segment and receiver.
Question List
1. Give the sequence numbers associated with each of the 3 segments sent by the sender. Format your answer as: a,b,c,...
2. Give the ACK numbers the receiver sends in response to each of the segments. If a segment never arrives use 'x' to denote it, and format your answer as: a,b,c,...
Solution
1. The sender's sequence numbers are: 385,890,1395
2. The receiver's ACKs are: 890,x,890
That's incorrect
That's correct
The answer was: 385,890,1395
The answer was: 890,x,890