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handshake

[hand-sheyk] /ˈhændˌʃeɪk/
noun
1.
a gripping and shaking of right hands by two individuals, as to symbolize greeting, congratulation, agreement, or farewell.
2.
Also, handshaking. Computers. an exchange of predetermined signals between a computer and a peripheral device or another computer, made when a connection is initially established or at intervals during data transmission, in order to assure proper synchronization.
Origin
1870-1875
1870-75; hand + shake
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for handshaking

handshaking

/ˈhændˌʃeɪkɪŋ/
noun
1.
(computing) communication between a computer system and an external device, by which each tells the other that data is ready to be transferred, and that the receiver is ready to accept it

handshake

/ˈhændˌʃeɪk/
noun
1.
the act of grasping and shaking a person's hand, as when being introduced or agreeing on a deal
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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handshaking in Technology


1. Predetermined hardware or software activity designed to establish or maintain two machines or programs in synchronisation. Handshaking often concerns the exchange of messages or packets of data between two systems with limited buffers. A simple handshaking protocol might only involve the receiver sending a message meaning "I received your last message and I am ready for you to send me another one." A more complex handshaking protocol might allow the sender to ask the receiver if he is ready to receive or for the receiver to reply with a negative acknowledgement meaning "I did not receive your last message correctly, please resend it" (e.g. if the data was corrupted en route).
Hardware handshaking uses voltage levels or pulses on wires to carry the handshaking signals whereas software handshaking uses data units (e.g. ASCII characters) carried by some underlying communication medium.
Flow control in bit-serial data transmission such as EIA-232 may use either hardware or software handshaking.
2. The method used by two modems to establish contact with each other and to agreee on baud rate, error correction and compression protocols.
3. The exchange of predetermined signals between agents connected by a communications channel to assure each that it is connected to the other (and not to an imposter). This may also include the use of passwords and codes by an operator.
[Jargon File]
(1995-01-13)

The Free On-line Dictionary of Computing, © Denis Howe 2010 http://foldoc.org
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Idioms and Phrases with handshaking
The American Heritage® Idioms Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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