Terminology

IP address (Internet Protocol address)

The address of a host (computer) on the Internet, consisting of four numbers, each from 0 to 255, separated by periods, e.g., 209.191.4.240. An IP address consists of a network ID that identifies the particular network the host belongs to, and a host ID uniquely identifying the host itself on that network. A network mask is used to define the network ID and the host ID. Because IP addresses are difficult to remember, they usually have an associated domain name that can be specified instead. See also domain name, network mask.

ISP (Internet Service Provider)

A company that provides Internet access to its customers, usually for a fee.

LAN (Local Area Network)

A network limited to a small geographic area, such as a home, office, or small building.

LED (Light Emitting Diode)

An electronic light-emitting device. The indicator lights on the front of the ADSL Barricade are LEDs.

MAC address (Media Access Control address)

The permanent hardware address of a device, assigned by its manufacturer. MAC addresses are expressed as six pairs of characters.

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