protocol data unit


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Protocol Data Unit

(PDU) A packet of data passed across a network. The term implies a specific layer of the OSI seven layer model and a specific protocol.

protocol data unit

The technical name of a frame of data transmitted over the data link layer (layer 2) in a communications network. Ethernet and Token Ring are examples of this layer. Many people neither use the term PDU nor the term frame, but call every unit of data traveling over a network a "packet." See OSI model and packet.
References in periodicals archive ?
Aligning with the results shown in Figure 4, this result clearly supports the evidence of performance improvement through frame aggregation of MAC protocol data units in underwater acoustic networks.
SCSI command descriptor blocks (CDBs) are packed into a protocol data unit (PDU) by the iSCSI driver and are then passed onto the transmission control protocol (TCP) stack.

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