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.

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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 NetscapeNetscape

The Internet Where did it come from? –History: ARPA networkARPA Largest computer network in the world –network: two things connected for communication –a network of networks Many parts: –WWW, gopher, telnet, ftp, Usenet, WWWgophertelnetftp Images courtesy of NetscapeNetscape

The World Wide Web A part of the Internet –history: CERNCERN Getting access –Service providers: AOL, SLU, Primary Network, Southwestern Bell Look at a browserbrowser “Browsing” & “surfing” Images courtesy of NetscapeNetscape

Browser Basics Location bar: name of file viewed –URL: Uniform Resource Locator 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 searchabledirectory-style searchable keywords: important words in a web page spiders: programs that wander the web, collecting informationspiders Images courtesy of NetscapeNetscape

Common Search Engines 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 operatorsBoolean operators –AND, OR, NOT look at “Advanced Search” tips on search sites Don’t know what it’s called? –Yahoo – wander through categoriesYahoo

Searching Techniques Choose the right search engine / site –Hotbot is known for technical information sitesHotbot –Dictionary.com for definitionsDictionary.com –Webopedia.com for computer informationWebopedia.com –Infospace.com for “phone book” informationInfospace.com –Mapquest.com or mapblast.com for mapsMapquest.com mapblast.com