packet - The unit of data sent across a network. "Packet" a generic term used to describe unit of data at all levels of the protocol stack, but it is most correctly used to describe application data units. See also: datagram, frame.
Ping - A method of checking to see whether or not a particular system is on-line. Some packages will send packets of data to test the connection.
Plug-ins - A type of Browser Add-on. Plug-ins are programs that plug into your Web browser to greatly extend its capabilities. They literally work within your browser; and without a browser, can't run. Plug-ins, therefore, display their information directly in your browser window. Examples of plug-ins include Quick Time, Real Audio, Java apps, Shockwave, and Virtual Reality Modeling Language (VRML).
Point Of Presence (POP) - A site where there exists a collection of telecommunications equipment, usually digital leased lines and multi-protocol routers.
Point-to-Point Protocol (PPP) - The Point-to-Point Protocol, defined in RFC 1171, provides a method for transmitting packets over serial point-to-point links. See also: Serial Line IP.
POP (Points of Presence) - those numbers (access locations) your modem dials to access the internet.
POP - See: Post Office Protocol and Point Of Presence
POP Server (Post Office Protocol) - One of two Internet mail server protocols. The POP server receives and stores e-mail text files. When checking e-mail for new messages received, the e-mail client (the e-mail program) logs onto the POP server and asks to see the messages in a mailbox.
port - A port is a transport layer demultiplexing value. Each application has a unique port number associated with it. See also: Transmission Control Protocol, User Datagram Protocol.
Post Office Protocol (POP) - A protocol designed to allow single user hosts to read mail from a server. There are three versions: POP, POP2, and POP3. Latter versions are NOT compatible with earlier versions. See also: Electronic Mail.
postmaster - The person responsible for taking care of electronic mail problems, answering queries about users, and other related work at a site. See also: Electronic Mail.
PPP - See: Point-to-Point Protocol
Protocol - In networking, a Protocol is a standard that permits two computers to exchange data.
protocol - A formal description of message formats and the rules two computers must follow to exchange those messages. Protocols can describe low-level details of machine-to-machine interfaces (e.g., the order in which bits and bytes are sent across a wire) or high-level exchanges between allocation programs (e.g., the way in which two programs transfer a file across the Internet).
