MSS

networking

Stands for: Maximum Segment Size

The largest chunk of actual data a TCP segment carries, after headers.

Maximum Segment Size is the MTU minus the IP and TCP header overhead, the real payload each segment can hold. "MSS clamping" lowers it deliberately to avoid fragmentation across a link with a smaller MTU, a common fix on tunnels.

Also known as: mss, mss clamping

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