handshake

a gripping and shaking of each other's hand in greeting, farewell, agreement, etc.
handshake

noun
- The grasping of hands by two people, as in greeting or leave-taking.
- Computers An exchange of signals between two devices when communications begin in order to ensure synchronization.
handshake

Noun
(plural handshakes)
handshake - Computer Definition

See handshaking.