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
------------------------------------------------------------------
Source port (16) Destination port (16)
________________________________________________________________

Sequence number (32)
_________________________________________________________________

Acknowledgement number (32)
_________________________________________________________________

Header Reserved Code Bits Window (16)
Length (6) (6)
(4)
______________________________________________________________

Checksum (16) Urgent (16)
________________________________________________________________

Options (0 or 32 if any)
_________________________________________________________________

Data (varies)

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