Transcript Chapter 1 Practice 4

Introduction to the Internet and
World Wide Web
The Internet
A network of networks
 Began in 1969 as ARPAnet (Advanced
Research Projects Agency)
 No central authority and thus impossible to
state the precise size
 The Internet is not free just because you
may not pay for it
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The World Wide Web
A subset of the Internet consisting of all
computers with hypertext or hypermedia
documents
 These documents contain references (links)
to other documents which may be on a
different computer anywhere in the world
 Began in 1991 at the European Particle
Physics Laboratory (CERN) in Switzerland
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A Client/Server Model
A server (Web server or Web site) is any
computer that stores then downloads
hypermedia documents
 A client is any computer that requests then
displays hypermedia documents
 Every client must be able to display every
document from every server and does so
through a browser (e.g., Netscape or
Internet Explorer)
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Acronyms Abound
HTTP - HyperText Transfer Protocol is used to
transmit hypermedia documents
 HTTPS - A secure protocol for confidential
transactions (e.g., credit cards)
 HTML - HyperText Markup Language is the
language used to write hypermedia documents
 TCP/IP - Transmission Control Protocol/
Internet Protocol - governs the flow of data
across the Internet
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URL Format
You can guess at the URL using the general
form of an “www.company.com”
 Examples:
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www.microsoft.com
www.nba.com
www.dell.com
www.whitehouse.gov
www.miami.edu
My Favorite Web Page
Suggestions for Searching
Use the Search button on the Internet
Explorer Toolbar
 Try multiple search engines on one query
 Be aware of logical operators - AND, OR,
and NOT
 Search on a concept; e.g., “first ladies” for
“Eleanor Roosevelt”
 Set bookmarks or favorites
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