(1) Short for Protocol Data Unit. The
term used to describe data as it moves from one layer of
the OSI model to another. In this reference, PDU is
often used synonymously with packet.
(2) Short for Power Distribution Unit.
An electrical device used to control the distribution
of power to individual loads. The PDU may be a stand-alone controlled device or
it may be integrated directly into the UPS
(uninterruptible power supply).
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