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Hosts A and B are communicating over a TCP connection, and Host B has already received from A all bytes up through byte 1 2
Hosts A and B are communicating over a TCP connection, and Host B has already received
from A all bytes up through byte Suppose Host A then sends two segments to Host B
backtoback. The first and second segments contain and bytes of data, respectively. In
the first segment, the sequence number is the source port number is and the
destination port number is Host B sends an acknowledgement 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 first segment arrives before the second segment, in the acknowledgement of the
first arriving segment, what is the acknowledgement number, the source port number,
and the destination port number?
c If the second segment arrives before the first segment, in the acknowledgement of the
first arriving segment, what is the acknowledgement number?
d Suppose the two segments sent by A arrive in order at B The first acknowledgement is
lost and the second acknowledgement arrives after the first timeout interval. Draw a
timing diagram, showing these segments and all other segments and acknowledgements
sent. Assume that there is no additional packet loss. For each segment in your figure,
provide the sequence number and the number of bytes of data; for each
acknowledgement that you add, provide the acknowledgement number.
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