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● NNTP — Network News Transfer Protocol. An Internet application protocol for reading and posting
Usenet (newsgroup) articles.
● PC Card — PCMCIA’s hardware standard for peripheral devices for laptop computers. Superseded by
the ExpressCard.
● PCMCIA — Personal Computer Memory Card International Association. An international standards
organization of industry-leading companies for the definition of personal computer peripheral device
standards.
● PDA — Personal Digital Assistant. A handheld device used for organization, notes, address books, etc.
● POP — Post Office Protocol. An Internet protocol for retrieving email from a remote server over a TCP/
IP connection.
● Port — A virtual data connection used by programs to exchange data. It is the endpoint in a logical
connection. The port is specified by the port number.
● Port Forwarding — A process that allows remote devices to connect to a specific computer within a
private LAN.
● Port Number — A 16-bit number used by the TCP and UDP protocols to direct traffic on a TCP/IP host.
Certain port numbers are standard for common applications.
● Protocol — A standard that enables connection, communication, and data transfer between
computing endpoints.
● PPP — Point-to-Point Protocol. A method of connecting a computer to the Internet.
● PPTP — Point-to-Point Tunneling Protocol. A method for implementing virtual private networks that
does not provide confidentiality or encryption but relies on the tunneling process for security.
● PRL — Preferred Roaming List. A list that your wireless phone or device uses to determine which
networks to connect with when you are roaming. (Network operator specific)
● Protocol — A standard that enables connection, communication, and data transfer between
computing endpoints.
● Proxy — A firewall mechanism that replaces the IP address of a host on the internal (protected)
network with its own IP address for all traffic passing through it.
● PUK code (Pin Unlock Key) — A PUK is required when you enter an incorrect PIN 3 times. After
entering the wrong PIN 3 times, the SIM card is disabled.
● RAS — Remote Access Service. A Windows NT/2000 Server feature that allows remote users access to
the network from their Windows laptops or desktops via modem.
● Rev A — CDMA EV-DO Rev. A is a leading-edge wireless technology with higher data rates and higher
system capacity. It is a fully backward compatible standard and remains interoperable with deployed
EV-DO networks and devices around the world. The increased data rates on Rev. A’s physical layer
enable richer applications and services. For more information, visit www.cdg.org.
● RFB — Remote Frame Buffer. A protocol for remote access to graphical user interfaces.
● Router — A device that directs traffic from one network to another.
● RTP — Real-time Transport Protocol. A packet format for streaming multimedia over the Internet.