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8/31: Ch. 1 The Internet & WWW
• What is the Internet?
• What is the WWW?
– Browser basics
• What is a search engine?
• What search engines are used
today?
Images courtesy of Netscape
The Internet
• Where did it come from?
– History: ARPA network
• Largest computer network in the
world
– network: two things connected for
communication
– a network of networks
• Many parts:
– WWW, gopher, telnet, ftp, Usenet, e-mail
Images courtesy of Netscape
The World Wide Web
• A part of the Internet
– history: CERN
• Getting access
– Service providers: AOL, SLU,
Primary Network, Southwestern
Bell
• Look at a browser
• “Browsing” & “surfing”
Images courtesy of Netscape
Browser Basics
• Location bar: name of file viewed
– URL: Uniform Resource Locator
http://www.adbook.net/teach011/index.htm#classes
protocol
domain
folder(directory) file
fragment
• Website: file displayed in the browser
• Navigation Buttons
• Common browsers: Netscape Navigator, MS
Internet Explorer
What is a search engine?
• search engines look through
their own directories of web
pages
• index: a list of web pages,
either directory-style or
searchable
• keywords: important words in
a web page
• spiders: programs that wander
the web, collecting information
Images courtesy of Netscape
Common Search Engines
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Yahoo
Excite
Hotbot
Ask Jeeves
Altavista
Lycos
Google
Searching Techniques
• Using the browser’s search engine
– Netscape uses Netcenter (then pick your own)
– MS Explorer allows you to pick an engine
• Use phrases in quotes
– “Saint Louis restaurants”, not Saint Louis restaurants
Searching Techniques
• Use Boolean operators
– AND, OR, NOT
• look at “Advanced Search” tips on search sites
• Don’t know what it’s called?
– Yahoo – wander through categories
Searching Techniques
• Choose the right search engine / site
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Hotbot is known for technical information sites
Dictionary.com for definitions
Webopedia.com for computer information
Infospace.com for “phone book” information
Mapquest.com or mapblast.com for maps