Transcript Slide 1

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

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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