Integrated Services Digital Network (ISDN)

A technology which combines voice and digital network services in a single medium. ISDN makes it possible for communications carriers to offer their customers digital services as well as voice connections through a single line.

Internet Protocol (IP)

An industry standard packet switching protocol used as the network layer in the TCP/IP protocol suite.

Internet Protocol Address (IP Address)

The 32-bit address defined by the Internet Protocol. Every resource on the Internet has a unique numerical IP Address, represented in dotted decimal notation. IP addresses are the nearest thing the Internet has to phone numbers. When you 'call' that number using any number of connection methods such as FTP, HTTP, etc. you get connected to the computer to which that IP address is assigned.

Internet Service Provider (ISP)

An ISP is a company that maintains a network that is linked to the Internet via a dedicated communication line, usually a high speed link known as a T1. An ISP offers use of it's lines to companies or individuals. Using a modem, these companies or individuals can dial up to the ISP whose computers will connect them to the Internet.

IP

See Internet Protocol

IP Address

See Internet Protocol Address

ISDN

See Integrated Services Digital Network

ISP

See Internet Service Provider