Hosts A and B are communicating over a TCP connection, and Host B has alreadyreceived from Host A all bytes up through (and including) byte 248. Suppose Host A then sends two back-to-back segments to Host B. The first and second segments contain40 and 60 bytes of data, respectively. In the first segment,the sequence number is 249, the source port number is 503, and the destination port numberis 80. Host B sends an acknowledgment (ACK) whenever it receivesa segment from Host A.
a. In the secondsegment sent from Host A to Host B, what are the sequence number, source port number,and destination port number?
b. Assume that the first segment arrivesbefore the secondsegment. In the acknowledgement of the first arrivingsegment, what are the acknowledgement sequencenumber, the source port number,and the destination port number?
c. Assume that the second segmentarrives before the first segment. In the acknowledgement of the first arrivingsegment what is the acknowledgement sequence number?