NIC: A Network Interface Card is a card installed in a device to provide network communication capabilities to and from that device.

node: A connection or switching point in a network, also called a host.

noise: Unwanted interference to a transmitted signal by an outside source.

PAP: Password Authentication Protocol. PPP protocol that ensures authentication of the connection between two devices.

PAT: Port Address Translation is a form of NAT that maps multiple Private IP addresses to a single Public IP address.

ping: An internet utility signal sent to check the accessibility of a device.

Plug-and-Play:The ability of a PC to configure expansion boards and other devices automatically without requiring the user to turn off the system during installation.

point-to-point connection: Any connection with only two endpoints. A dedicated data link that connects only two stations.

poison reverse: A routing protocol command that tells its neighbor gateways that one of the gateways is no longer connected.

POP: Point Of Presence.

Port: An access point where data can enter or exit.

POTS: Plain Old Telephone Service.

PPPover ATM: Point-to-Point Protocol over Asynchronous Transfer Mode.

PPP:Point-to-Point Protocol. A protocol (RFC 1661) for transmitting packets over serial links between devices made by the same or different manufacturers.

PPPoE: Point-to-Point Protocol over Ethernet. A method for establishing sessions and encapsulating PPP packets over an Ethernet, specified by RFC 2516.

PPTP: Point-to-Point Tunneling Protocol. An extension of Point-to-Point Protocol used to create virtual private networks between PCs.

protocol: A set of rules that govern the transmission of data between interconnected devices to maintain or improve communication.

proxy server: Provides a list of items available on other servers to increase the availability and speed of retrieving that information.

PSTN: Public Switched Telephone Network. The standard telephone network.

6212-A2-GB20-20

July 2004

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