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+ | # TCP Flags | ||
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+ | Transmission Control Protocol (TCP) Flags are control bits for [TCP](/glossary/t/tcp) messages. These flags indicate how packets should be handled or indicate connection states. | ||
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+ | ^ Flag ^ Description ^ | ||
+ | | SYN | Synchronize sequence numbers. | | ||
+ | | ACK | Acknowledgment field is significant. | | ||
+ | | FIN | No more data from sender. | | ||
+ | | RST | Reset the connection. | | ||
+ | | URG | Urgent pointer field is significant. | | ||
+ | | PSH | Push function. | | ||
+ | | CWR | Congestion Window Reduced. | | ||
+ | | ECE | TCP peer is ECN capable. | | ||