What does protocol data unit actually mean? Find out inside PCMag's comprehensive tech and computer-related encyclopedia.

Protocol data unit. One 'Protocol data unit' story August 2012. See All Stories. iOS; ... Interesting statement from Apple that seems to throw the blame for the SMS vulnerability over to the SMS ...

In networking and communications, the formats, codes and procedures for transmitting a unit of data (frame, packet) from one node to another. Known as a "layer 2 protocol," the data link protocol ...