Establishing a connection
To establish a connection, there is a classic handshake protocol known as the three-way handshake.
The first packet from the station initiating the connection can be identified, it has its synchronisation (SYN) bit set.
The response has both the synchronization bit and the acknowledment (ACK) bit set, ackknowledging the SYN request.
The final handshake is just an acknowledgment that both sides agree a connection has been established.
During this process, both sides agree on initial sequence numbers.
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