developer-roadmap/roadmaps/server-side-game-developer/content/segment-structure@zTCmPUp9j5P1wpGgiboMa.md

Segment Structure

A TCP segment consists of a header and a data payload. The header includes source and destination ports, sequence and acknowledgment numbers, control flags (SYN, ACK, FIN, RST), window size, checksum, and optional fields; these fields together govern connection setup, data flow, and teardown.

Visit the following resources to learn more:

• @article@TCP Segment Structure - IBM
• @article@TCP Header: Size, Structure, Options, Format, Checksum - Noction
• @article@TCP Header - NetworkLessons