| TCP option 2, Maximum Segment Size |
Description:
This option can be used to specify the maximum segment size that the receiver should use.
| MAC header | IP header | TCP header | TCP option | Data |
TCP Option 2:
| 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Kind | Length | ||||||||||||||
| Maximum Segment Size | |||||||||||||||
Kind. 8 bits. Set to 2.
Length. 8 bits. Set to 4.
Maximum Segment Size. 16 bits.
This field must only be sent in the
initial connection request (i.e., in segments with the SYN control bit set). If
this option is not used, any segment size is allowed.
Glossary:
RFCs:
[RFC 793] Transmission Control Protocol.