Transmission Control Protocol
For information about Transmission Control Protocol (TCP) headers, see the following table.
For the TCP specification, see RFC793 available at http://www.rfc-editor.org.
| bits 0–7 | bits 8–15 | bits 16–23 | bits 24–31 | ||||||
|---|---|---|---|---|---|---|---|---|---|
|
Source Port Number (16 bits) |
Destination Port Number (16 bits) |
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|
Sequence Number (32 bits) |
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|
Acknowledgment Number (32 bits) |
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|
TCP Header Length (4 bits) |
Reserved (6 bits) |
URG |
ACK |
PSH |
RST |
SYN |
FIN |
Window Size (16 bits) |
|
|
Checksum (16 bits) |
Urgent Pointer (16 bits) |
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|
Options (if any) + Padding (matching to 32-bit boundary) |
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| ( data . . . ) | |||||||||