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Consider the figure below in which TCP a sender and receiver communicate over a connection in which the sender-to-receiver segments may be lost.

The TCP sender sends initial window of four segments at t=1,2,3,4, respectively.

The delay between the sender and the receiver is 7 time units, and so the first segment arrives a the receiver at t=8. As shown in the figure below, two of the four segment(s) are lost between the sender and the receiver.

Answer the following questions.

1) Give the sequence numbers associated with each of the four segments sent by the sender

TCP SEGMENT 1

TCP SEGMENT 2

TCP SEGMENT 3

TCP SEGMENT 4

2) List the sequence of acknowledgment transmitted by the TCP receiver in response to the receipt of the segments actually received. In particular, give the value in the acknowledgment field of each receiver-to-send acknowledgment.

If no ACK is sent, out none as your answer

ACK 1 =

ACK 2 =

ACK 3 =

ACK 4 =

TCP sender TCP receiver (#2 t 4 lost lost (#8 t#9 t10 t 11