Terminology

Blogs	Web pages where people can publish their personal opinions and thoughts
	about any conceivable topic.
Computer network	A collection of computers or computer-like devices that can communicate across a
	common transmission medium.
Data network	A system that transfers data between network access points (nodes).
Extranet	A network that is limited in scope to a single organization or entity and also has limited
	connections to the networks of one or more other usually, but not necessarily, trusted
	organizations or entities.
Instant messaging	A real-time text communication between two or more users. It has expanded to include
(IM)	voice, photo and video sharing, and file transfers.
Internet	A network of networks.
Internetwork	A collection of two or more LANs connected by WANs.
Internet service	A company that provides access to the Internet.
provider (ISP)

Terminology

Intranet	A set of networks that is under the control of a single administrative entity.
	That administrative entity closes the intranet to all but specific, authorized users.
	Most commonly, an intranet is the internal network of an organization.
Local Area	A computer network that interconnects computers in a limited area such as a
Network (LAN)	home, office, building, or campus.
Metropolitan Area	A network with a size between a LAN and a WAN. It normally covers the
Networks (MAN)	area inside a town or a city.
Podcasting	An audio-based medium that originally enabled people to record audio and convert
	it for use with iPods.
Wide Area	A network that provides long-distance transmission of data over large geographic
Network(WAN)	areas that may comprise a country, a continent, or even the whole world.
Wiki	A type of publicly created web content. Wiki web pages are created and edited
	by groups of people sharing information.