Host A and B are communicating over a TCP connection. Host B has already received from Host A all bytes up through byte 23. Suppose Host A then sends two segments to Host B back-to-back. The first and the second segments contain 30 and 50 bytes of data, respectively. In the first segment, the sequence number is 24, the source port number is 3000, and the destination port number is 80. Host B sends an acknowledgment whenever it receives a segment from Host A. A. In the second segment sent from Host A to B, what are the sequence number_________, source port number __________, and destination port number__________? B. If the second segment arrives after the first segment, in the acknowledgment of the second segment, what are the acknowledgment number___________, the source port number__________, and the destination port number __________? C. If the second segment arrives before the first segment, in the acknowledgment of the first arriving segment, what is the acknowledgment number ___________? D. Suppose the two segments sent by A arrive in order at B. The first acknowledgment arrives after the first timeout interval. A will transmit the next segment with what sequence number__________? Note: fill in integer numbers only in the blanks.
Host A and B are communicating over a TCP connection. Host B has already received from Host A all bytes up through byte 23. Suppose Host A then sends two segments to Host B back-to-back. The first and the second segments contain 30 and 50 bytes of data, respectively. In the first segment, the sequence number is 24, the source port number is 3000, and the destination port number is 80. Host B sends an acknowledgment whenever it receives a segment from Host A.
A. In the second segment sent from Host A to B, what are
the sequence number_________,
source port number __________,
and destination port number__________?
B. If the second segment arrives after the first segment, in the acknowledgment of the second segment, what are
the acknowledgment number___________,
the source port number__________,
and the destination port number __________?
C. If the second segment arrives before the first segment, in the acknowledgment of the first arriving segment,
what is the acknowledgment number ___________?
D. Suppose the two segments sent by A arrive in order at B. The first acknowledgment arrives after the first timeout interval.
A will transmit the next segment with what sequence number__________?
Note: fill in integer numbers only in the blanks.
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