Glossary
DSL (digital subscriber line). A technology that takes advantage of standard copper telephone lines to provide
Ethernet. A local area network protocol used to connect devices within a single building or campus at speeds up to 10 Mbps.
Fast Ethernet. A local area network protocol used to connect devices within a single building or campus at speeds up to 100 Mbps.
Firewall. A set of related programs located at the gateway server of a network that protects information contained within the network from users outside the network (on the Internet). A company with an intranet that also allows workers to access to the wider Internet installs a firewall to prevent outsiders from accessing its data resources.
FTP (file transfer protocol). A protocol used to send files over the Internet.
Gateway. A combination of hardware and software that links two different types of networks.
Gbps (gigabits per second). A measure of bandwidth capacity or transmission speed. It represents a billion bits per second.
Gigabyte. A billion bytes of data. HPNA. Home Phone Network Alliance.
Hub. A common connection point for devices on a network.
IEEE. The Institute of Electrical and Electronics Engineers. An organization of engineers, scientists, and students best known for developing standards for the computer and electronics industry.
ISDN (integrated services digital network). A set of standards for digital transmission capable of carrying data, voice, and video over ordinary telephone copper wire as well as over other media. ISDN protocols are used worldwide for connections to public ISDN networks or to attach ISDN devices to
Interface. A point of connection between two systems, networks, or devices.
Internet. The world's largest computer network, which originated from a research effort initiated by the U.S. Government and was initially used to connect defense contractors and U.S. universities. Today, its nature is more commercial, and it is becoming the preferred method of linking business and individual computers to one another.
Internet access. The physical connection between the subscriber and the nearest Internet access node.
ISP (internet service provider). A single computer network, connected to the Internet, that provides access for individual computers to the Internet. ISPs provide local
Intranet. A local network with internal Web servers that are accessible to computers in the office, but not accessible from outside the company. Many intranets are protected from exterior access by security devices such as firewalls.
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