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TCP handshake meaning of terms #2520

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6 changes: 6 additions & 0 deletions README.rst
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Expand Up @@ -367,6 +367,12 @@ This send and receive happens multiple times following the TCP connection flow:
* The other sides ACKs the FIN packet and sends its own FIN
* The closer acknowledges the other side's FIN with an ACK

Here's what each term means:

SYN: Short for "synchronize." It's a message sent to initiate a connection.
ACK: Short for "acknowledge." It indicates that a packet or request has been received.
SYN-ACK: A combined message that both synchronizes (SYN) and acknowledges (ACK) the receipt of the initial SYN.

TLS handshake
-------------
* The client computer sends a ``ClientHello`` message to the server with its
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