application protocol data unit

Computing Dictionary

Application Protocol Data Unit definition

networking
(APDU) A packet of data exchanged between two application programs across a network. This is the highest level view of communication in the OSI seven layer model and a single packet exchanged at this level may actually be transmitted as several packets at a lower layer as well as having extra information (headers) added for routing etc.
(1995-12-19)

The Free On-line Dictionary of Computing, © Denis Howe 2010 http://foldoc.org
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