06-06-2008 06:36 AM - edited 03-05-2019 11:28 PM
Hi all, when I make a connection to a server etc, is the first message a tcp syn, is this the handshake?
06-06-2008 06:57 AM
yes
06-06-2008 07:14 AM
It's the "first" packet of a "three-way" handshake.
1. Client sends SYN
2. Server sends SYN/ACK
3. Client sends ACK
It's used to synchronize sequence numbers, and to verify that each side received the other's message.
Tearing down a TCP connection is a four-way handshake.
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