Tcp tutorial part 2

TCP Segment format:

The figure below show the TCP segment format. It show the different
field within the TCP header.

bit 0 bit 16 bit 32
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Source port (16) Destination port (16)
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Sequence number (32)
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Acknowledgement number (32)
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Header Reserved Code Bits Window (16)
Length (6) (6)
(4)
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Checksum (16) Urgent (16)
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Options (0 or 32 if any)
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Data (varies)
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