(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).
Pronounced “peep” and short for Protected Extensible Authentication Protocol, a protocol developed jointly by Microsoft, RSA Security and Cisco for transmitting authentication data, including passwords, over 802.11 wireless networks. PEAP authenticates wireless LAN clients using only server-side digital certificates by creating an encrypted SSL/TLS tunnel between the client and the authentication server. The tunnel then […]
Short for PHP Extension and Application Repository, PEAR is a framework and distribution system for reusable PHP components. PEAR is a community-driven project with the PEAR Group as the governing body. The project was founded by Stig S. Bakken in 1999. The code in PEAR is partitioned in packages, where each package is a separate […]
PEX is a special dielectric that insulates each conductor from each other to help eliminate noise. It is a technology commonly used in Monster Cable products.
PEBCAK is technical support shorthand (slang) for “Problem Exists between Chair and Keyboard”. Generally this term is used by technical support personnel to describe a problem that was caused by the computer user as opposed to a technical problem with the physical computer equipment.
Short for Packet Filter PF is more commonly called the OpenBSD Packet Filter. Packet Filter is the system used by OpenBSD for filtering TCP/IP traffic and also for doing Network Address Translation (NAT). Packet Filter has been included in the OpenBSD kernel since the release of OpenBSD version 3.0.