There are two different handshakes, I'll go with the basic TCP one though.

Say you have two different people.

Dan and Dan

Dan is the first host, and Dan is the second host.

Dan sends Dan a synchronized message (SYN) which Dan receives

Dan then replies that he acknowledged it, synchronized-acknowledged (SYN-ACK)

Dan then replies that she acknowledged the acknowledgement and Dan doesn't reply.

#Danstr