Networks and the Internet

Network

 A collection of computers and devices connected together via communications devices and transmission media

Local Area Network (LAN)

 A network that connects computers in a limited geographic area, such as a school lab, or office

Wide Area Network (WAN)

 A network that covers a large geographical area, such as one that connects the district offices of a national corporation

Internet

 World’s largest network  Worldwide collection of networks that connects millions of   businesses government agencies   educational institutions individuals

What do people use the Internet for?

     Communicating with and meeting other people Getting information, news, research Shopping Banking Entertainment: games, music, videos, books

Internet Service Provider (ISP)  An organization that supplies connections to the Internet for a monthly fee  Comcast   AT&T Earthlink

World Wide Web

 Segment of the Internet that contains billions of Web pages

Web Page

 Document containing text, graphics, audio, and video that can be accessed through a web browser Web site:  A related collection of Web pages Web browser:  Software program used to access and view Web pages Uniform Resource Locator (URL)  A web page’s unique address

Hypertext Link

 text that will lead the user to other related information

Search Engine

 a computer program that retrieves documents from a computer network  Google, Bing, Cha Cha

Downloading

 to receive data to a local system from a remote system