The%20Internet

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The Internet
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What is the Internet?

• A community with about 100 million users
• Available in almost every country
• about 160,000 people are added each month
• about 100 companies are added each week

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How did it start?

• In early 1969, as ARPANET
• ARPA Advanced Research Projects Agency
• A division of the Department of Defense
• There were four computers connected
• University of Utah University of California,
  Santa Barbara University of California, Los
  Angeles and Stanford.
• Designed to demonstrate the feasibility of
  building networks over a wide area

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What was the purpose?

• The military wanted a reliable system that, even
  if one computer site was destroyed, the rest
  would continue to function

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Timeline

• 1972 Publicly demonstrated with a total of 50
  universities.
• 1990 The Internet funded by both government and
  private industry.
• 1993 The World Wide Web was created.
• only about 100 web servers at that time
• 1994 only about 14 of web sites were commercial
  -- now it is over 90

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Internet Size vs. Web Size

• Internet size
• Number of web servers on the web doubles every
  year
• Web size
• Number of pages doubles every few months

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Who owns the Internet?

• no one and everyone
• the Internet Society
• proposes guidelines for the technical development
  of the Internet
• decides which protocols to support
• InterNIC
• controls the registration of Internet addresses
  (domain names)

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What can your transfer

• Any digital media
• pictures
• sounds
• movies
• text
• anything that a computer can store or that can be
  digitized

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Applications

• World Wide Web
• a retrieval system based on technology that
  organizes information into pages and uses a
  browser to display the pages
• Gopher
• The forerunner of the Web, not graphical

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Applications

• Telnet
• Allows you connect one computer to another
• FTP
• Allows you to transfer a file from one machine to
  another.

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Applications (cont.)

• E-Mail
• Send a message from one user to another
• Chain letters
• You're not anonymous!
• Chat
• Internet Relay Chat (IRC)
• Voice Chat

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Applications (cont.)

• Mailing lists
• Usenet or News groups
• A collection of groups that discuss anything and
  everything.

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Terms of The World Wide Web

• web page
• web site, home page
• web server
• web Browser
• URL Universal Resource Locator
• how to get there//where to go/what to get
• HTTP Hyper Text Transfer Protocol
• HTML Hyper Text Markup Language

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Terminology (cont.)

• hyperlink A link on a web page that will take
  you to other web pages. Can be text or graphical
  (hypermedia).
• search engine A way to search for information in
  the Web. Uses key words from the Web page title.

15
Access providers.

• Provide you access to the Internet at a cost
• Commercial Online Services
• America Online (AOL)
• Microsoft Network (MSN)
• Internet Service Providers (ISP)
• Wyoming.com, Lariat

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Using the Internet.

• The people in the Internet are the same people as
  in the real world.
• Information on the Internet can be wrong.