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Glossary
datagram
Data sent over a network. A datagram contains not only user data, but also all the
necessary header information for the data to reach its intended destination.
firewall
A computer or router that blocks certain types of network datagrams from passing
between networks. One example of a firewall is a computer that routes data between a
local area network and the Internet, but disallows certain types of direct access from the
Internet to computers on the local area network.
See also gateway.
gateway
A computer or router through which data passes between networks. One example of a
gateway is a computer located between a local area network (LAN) and the Internet.
See
also firewall.
intranet
An internal or limited network that uses the basic technologies of the Internet, including
Transmission Control Protocol/Internet Protocol (TCP/IP) and World Wide Web servers
and browsers.
See also local area network, internet, and Internet.
Internet
The world-wide network of computers communicating via Internet protocol (IP)
datagrams.
See also internet.
Internet service provider
Also ISP. An organization or individual who provides the network access for you to
connect to the Internet. The ISP relays data from your gateway computer or router to the
Internet and vice-versa.
Internet Protocol (IP)
The communication protocol used in combination with TCP to form the standard means
(TCP/IP) of communication on the Internet.