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Suppose A and B create a TCP connection with ISNA=20,000 and ISNB=5,000. A sends three 1000-byte packets (Data1, Data2 and Data3 below), and B ACKs

Suppose A and B create a TCP connection with ISNA=20,000 and ISNB=5,000. A sends three 1000-byte packets (Data1, Data2 and Data3 below), and B ACKs each. Then B sends a 1000-byte packet DataB to A and terminates the connection with a FIN. In the table below, fill in the SEQ and ACK fields for each packet shown.

A sends B sends
SYN, ISNA=20,000
SYN, ISNB=5,000, ACK=______
ACK, SEQ=______, ACK=______
Data1, SEQ=______, ACK=______
ACK, SEQ=______, ACK=______
Data2, SEQ=______, ACK=______
ACK, SEQ=______, ACK=______
Data3, SEQ=______, ACK=______
ACK, SEQ=______, ACK=______
DataB, SEQ=______, ACK=______
ACK, SEQ=_____, ACK=______
FIN, SEQ=______, ACK=______

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