Penguin
Annotated edit history of SYN version 1, including all changes. View license author blame.
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1 PerryLorier 1 A flag in a [TCP] packet, short for "Synchronise", which is used to set up a connection.
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3 To set up a [TCP] connection there are three packets involved, the initiator sends "SYN" to the reciever, the reciever acks the [SYN] with a packet with the "SYN" and "ACK" flags set, the initiator then [ACK]'s the recievers [SYN] [ACK] packet.
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5 See TcpStates