Computer Science Assessment - Internet Intranet and Extranet

Chapter 7 Internet, Intranet, and Extranet Internet World wide group of computers and networks Internet: Connecting networks – which is what the internet is Backbone: Main network that supports the other networks Hypertext: links users can follow Hypermedia: documents with links to other media in the document Domain Name System Lindenwood: lindenwood.edu Domain Name: Uniquely identifies Lindenwood’s computers and addresses IP: Internet Protocol. The numbers that the domain name stands for: 68.191.206.6 URL: Uniform Resource Locator – address of a document/ site on internet Part of URL http://www.lindenwood.edu/index.htmlhttp://www.lindenwood.edu/index.html http: hypertext transfer protocol – a protocol to see/request/send web pages www: World wide web Lindenwood.edu: Domain name Edu: Top level Domain name type (.com, .mil, .gov, .uk are others) Index.html: web page. Html stands for hypertext markup language, which defines how page is laid out & how it looks Internet Connections Symmetric: Both receiving and transmitting are at the same rate (from the client’s point of view) Asymmetric: lower transmission rate upstream (sending rate from client) than receiving rate. Navigation tools Browsers: program that allows you to see the web pages. Knows how to interpret the html to show you the page (protocol defining how it should work based on text of page) Search Engines Crawl web: Search engines (at server side) search the web to find new web sites Creates indices based on words in web pages and on meta tags Index web Search process: uses index to return likely pages and prioritizes pages by likelihood Intranet: Private network http://lakshyasadhana.blogspot.com/2012/09/internetintranet-and-extranet.html Extranet: Intranets connected http://www.weldingandgasestoday.org/index.php/2009/03/exercise-an-extranet/ 1969: Arpanet: UCLA, UC Santa Barbars, Standford, Univ of Utah Backbone is out of fiber optics. Faster than the...