Consider the figure below in which a TCP sender and receiver communicate over a connection in which
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Question:
- Consider the figure below in which a TCP sender and receiver communicate over a connection in which the sender-to-receiver segments may be lost. The TCP sender sends initial window of five segments at t=1,2,3,4,5, respectively. Suppose the initial value of the sender-to-receiver sequence number is 136 and all sender-to-receiver segments each contain 550 bytes. The delay between the sender and the receiver is 7 time units, and so the first segment arrives at the receiver at t=8, and a receiver-to-sender ACK for this segment arrives at the TCP sender at t=15. As shown in the figure, 2 of the five segments are lost between the sender and the receiver, butnoneof the receiver-to-sender ACKs are lost. Answer the following questions:
- Give the sequence number field value in the sender-to-receiver segments in the first set of segments that are sent beginning at t=1, and the acknowledgement number field value in the receiver-to-sender ACK segments that are sent from the receiver back to the sender beginning at t=8.
- Next consider the sender-to-receiver segments generated by the sender in response to the ACKS that are received beginning at t=15. Give the sequence number of the segments transmitted and a brief explanation of why a given segment is transmitted, or not transmitted, on receipt of an ACK.
Related Book For
Computer Networking A Top-Down Approach
ISBN: 978-0136079675
5th edition
Authors: James F. Kurose, Keith W. Ross
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