Introduction to Information Technology, 2 nd Edition Turban, Rainer & Potter © 2003 John Wiley & Sons, Inc. 7-1 Introduction to Information Technology Chapter 7: The Internet, Intranets, and Extranets

Introduction to Information Technology, 2 nd Edition Turban, Rainer & Potter © 2003 John Wiley & Sons, Inc. 7-2 The Internet Today The Internet is international, with users on all continents The Internet is international, with users on all continents Political, cultural, and regulatory barriers have slowed the rate of Internet adoption internationally Political, cultural, and regulatory barriers have slowed the rate of Internet adoption internationally The vast majority of sites are in English The vast majority of sites are in English The vast majority of content is generated in the United States The vast majority of content is generated in the United States

Introduction to Information Technology, 2 nd Edition Turban, Rainer & Potter © 2003 John Wiley & Sons, Inc. 7-3 The Operation of the Internet Packets of information flow between machines governed by common rules (protocols): Packets of information flow between machines governed by common rules (protocols): Internet protocol (IP)Internet protocol (IP) Transport control protocol (TCP)Transport control protocol (TCP) Internet is a packet-switching network Internet is a packet-switching network Packets travel independently and possibly on different routes through the InternetPackets travel independently and possibly on different routes through the Internet Packets are reassembled into the message at the receiving machine.Packets are reassembled into the message at the receiving machine.

Introduction to Information Technology, 2 nd Edition Turban, Rainer & Potter © 2003 John Wiley & Sons, Inc. 7-4 An application that uses the Internet transport functions An application that uses the Internet transport functions Based on HTML - standard hypertext language used in Web Based on HTML - standard hypertext language used in Web Handles text, hypermedia, graphics, and sound Handles text, hypermedia, graphics, and sound Internet Services – W W W

Introduction to Information Technology, 2 nd Edition Turban, Rainer & Potter © 2003 John Wiley & Sons, Inc. 7-5 Home Page - a text and graphical screen display; first, introductory page in a web site Home Page - a text and graphical screen display; first, introductory page in a web site Web Site - all the pages of a company or individual Web Site - all the pages of a company or individual Hyperlinks - ways to link and navigate around the pages on a web site Hyperlinks - ways to link and navigate around the pages on a web site Webmaster - the person in charge of a Web site Webmaster - the person in charge of a Web site Uniform Resource Locator (URL) - points to the address of a specific resource on the Web Uniform Resource Locator (URL) - points to the address of a specific resource on the Web Hypertext Transport Protocol (HTTP) - communications standard used to transfer pages across the WWW portion of the Internet Hypertext Transport Protocol (HTTP) - communications standard used to transfer pages across the WWW portion of the Internet The World Wide Web (continued)

Introduction to Information Technology, 2 nd Edition Turban, Rainer & Potter © 2003 John Wiley & Sons, Inc. 7-6 Internet Challenges New Technologies New Technologies Adopted by vendors more rapidly than users and customers can implement themAdopted by vendors more rapidly than users and customers can implement them Web developers cannot assume that users can run their innovations successfullyWeb developers cannot assume that users can run their innovations successfully Internet Regulation Internet Regulation These organizations are not formally charged in any legal or operational sense with responsibility for the InternetThese organizations are not formally charged in any legal or operational sense with responsibility for the Internet How to control controversial content on the Web?How to control controversial content on the Web?

Introduction to Information Technology, 2 nd Edition Turban, Rainer & Potter © 2003 John Wiley & Sons, Inc. 7-7 Internet Challenges (continued) Internet Expansion Internet Expansion Tremendous Internet traffic growth has strained some elements of the networkTremendous Internet traffic growth has strained some elements of the network Slower retrieval times Slower retrieval times Unreliable data transmission Unreliable data transmission Denial of service by overloaded servers Denial of service by overloaded servers

Introduction to Information Technology, 2 nd Edition Turban, Rainer & Potter © 2003 John Wiley & Sons, Inc. 7-8 Internet Challenges (continued) Internet Privacy - Web sites collect information with and without consumers’ knowledge Internet Privacy - Web sites collect information with and without consumers’ knowledge Cookie - small data file placed on users’ hard drives when a site is first visited. Collects data on pages visited and content viewed.Cookie - small data file placed on users’ hard drives when a site is first visited. Collects data on pages visited and content viewed.

Introduction to Information Technology, 2 nd Edition Turban, Rainer & Potter © 2003 John Wiley & Sons, Inc. 7-9Intranets A private network that uses Internet software and TCP/IP protocols A private network that uses Internet software and TCP/IP protocols Provide employees with easy access to corporate informationProvide employees with easy access to corporate information Examples – policies and procedures manuals; human resource forms; product catalogs Examples – policies and procedures manuals; human resource forms; product catalogs

Introduction to Information Technology, 2 nd Edition Turban, Rainer & Potter © 2003 John Wiley & Sons, Inc. 7-10Extranets An extension of an intranet to selected outside business partners, such as suppliers, distributors, and key customers An extension of an intranet to selected outside business partners, such as suppliers, distributors, and key customers Provide business partners with easy access to corporate information and easy collaborationProvide business partners with easy access to corporate information and easy collaboration

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