1. CHAPTER 7 THE INTERNET AND INTRANETS 1/11

2. What is the Internet? 2/11 Large computer network ARPANET (Dept of Defense) It is international and growing New possibilities and new issues

3. The Operation of the Internet IP- set of rules used to send packets over InternetIP- set of rules used to send packets over Internet IP address - uniquely identifies one from the other computersIP address - uniquely identifies one from the other computers DNS - derives the names of the computersDNS - derives the names of the computers Domain name - consists of multiple parts, separated by dots, and are translated from right to left; upper names are most important (the dot com; bmw.com)Domain name - consists of multiple parts, separated by dots, and are translated from right to left; upper names are most important (the dot com; bmw.com) 3/11

4. The World Wide Web The Internet - functions as the transport mechanism The Internet - functions as the transport mechanism WWW - an application that uses the Internet transport functions, a system with universally accepted standards for storing, retrieving, formatting, and displaying information via a client/server architecture WWW - an application that uses the Internet transport functions, a system with universally accepted standards for storing, retrieving, formatting, and displaying information via a client/server architecture HTML - standard hypertext language used in Web HTML - standard hypertext language used in Web Hyperlinks - from one Web page to another Hyperlinks - from one Web page to another 4/11

5. The WWW (continued …) 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 Webmaster - the person in charge of a Web site Webmaster - the person in charge of a Web site URL - points to the address of a specific resource on the Web URL - points to the address of a specific resource on the Web HTTP - communications standard used to transfer pages across the WWW portion of the Internet HTTP - communications standard used to transfer pages across the WWW portion of the Internet 5/11

6. The WWW (continued …) Browser (software application that is used to access and navigate the Web) Browser (software application that is used to access and navigate the Web) Netscape CommunicatorNetscape Communicator Microsoft Internet ExplorerMicrosoft Internet Explorer 6/11

7. The WWW (continued …) Search Engines Search Engines programs that return a list of Web sites or pages that match some user-selected criteriaprograms that return a list of Web sites or pages that match some user-selected criteria www.google.comwww.google.comwww.google.com www.yahoo.comwww.yahoo.comwww.yahoo.com www.infoseek.comwww.infoseek.comwww.infoseek.com 7/11

8. Internet Challenges New Technologies New Technologies Vendors are adopting new technologies more rapidly than many users and customers can implement themVendors are adopting new technologies more rapidly than many users and customers can implement them Internet Regulation Internet Regulation Some technical organizations are not formally charged in any legal or operational sense with responsibility for the InternetSome technical organizations are not formally charged in any legal or operational sense with responsibility for the Internet 9/11

9. Internet Challenges (continued …) Internet Expansion Internet Expansion The massive growth of Internet traffic has strained some elements of the networkThe massive growth of Internet traffic has strained some elements of the network 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 they first visit a siteCookie - small data file placed on users’ hard drives when they first visit a site 10/11

10. Intranets A private network that uses Internet software and TCP/IP protocols A private network that uses Internet software and TCP/IP protocols Security Security public key security, encryption, digital certificates, firewall and assured pipelinespublic key security, encryption, digital certificates, firewall and assured pipelines 11/11