Question: Two hosts A and B are using TCP to send data to each other. Each segment may carry piggybacked ACKs in addition to data. The

Two hosts A and B are using TCP to send data to each other. Each segment may carry piggybacked ACKs in addition to data. The timing diagram on the next page shows a few of the TO) segments that are transmitted in each direction (there may have been earlier transmissions). The X denotes a lost segment. The receiver buffers out-of-sequence segments, and there is no window size constraint. For each segment, the Sequence Number, the ACK sequence number, and the size of data carried in the segment are shown, except some of the numbers are missing. Fill in these missing quantities. Also show all the transmissions that occur in both directions after the Timeout at host A, assuming that no new data packets are sent after this in either direction and no more packets are lost.

Host A A1 A2 A3 Timeout A4 A5 A6 B4 B2 B5

Host A A1 A2 A3 Timeout A4 A5 A6 B4 B2 B5 B1 B3 *X Host B Packet Seq ACK A1 4800 1500 A2 A3 A4 A5 A6 B1 B2 B3 B4 B5 Size 1600 1600 1600 1600 1600 1600 500 500 500 0 0

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