Updated: 04/26/2017 by Computer Hope

Short for Protocol Data Unit, PDU is information delivered through a network layer. For the network to understand what layer is being discussed, a single-letter prefix is added to the PDU.

LPDU - Communication for the data link layer.

NPDU - Communication for the network layer.

TPDU - Communication for the transport layer.

BPDU, Network terms, OSI, SDU