Ch07 the internet intranets and extranets

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Ch07 the internet intranets and extranets

  1. 1. Information Systems, Ninth Edition Chapter 7 The Internet, Intranets, and Extranets
  2. 2. Principles and Learning Objectives <ul><li>The Internet is like many other technologies—it provides a wide range of services, some of which are effective and practical for use today, others that are still evolving, and still others that will fade away from lack of use </li></ul><ul><ul><li>Briefly describe how the Internet works, including alternatives for connecting to it and the role of Internet service providers </li></ul></ul>Principles of Information Systems, Ninth Edition
  3. 3. Principles and Learning Objectives (continued) <ul><li>Originally developed as a document-management system, the World Wide Web is a hyperlink-based system that is easy to use for personal and business applications </li></ul><ul><ul><li>Describe the World Wide Web and how it works </li></ul></ul><ul><ul><li>Explain the use of Web browsers, search engines, and other Web tools </li></ul></ul><ul><ul><li>Identify and briefly describe the applications associated with the Internet and the Web </li></ul></ul>Principles of Information Systems, Ninth Edition
  4. 4. Principles and Learning Objectives (continued) <ul><li>Because use of the Internet and World Wide Web is becoming universal in the business environment, management, service and speed, privacy, and security issues must continually be addressed and resolved </li></ul><ul><ul><li>Identify who is using the Web to conduct business and discuss some of the pros and cons of Web commerce </li></ul></ul><ul><ul><li>Outline a process for creating Web content </li></ul></ul>Principles of Information Systems, Ninth Edition
  5. 5. Principles and Learning Objectives (continued) <ul><ul><li>Describe Java and discuss its potential impact on the software world </li></ul></ul><ul><ul><li>Define the terms intranet and extranet and discuss how organizations are using them </li></ul></ul><ul><ul><li>Identify several issues associated with the use of networks </li></ul></ul>Principles of Information Systems, Ninth Edition
  6. 6. Use and Functioning of the Internet <ul><li>ARPANET </li></ul><ul><ul><li>Ancestor of the Internet </li></ul></ul><ul><ul><li>Project started by the U.S. Department of Defense (DoD) in 1969 </li></ul></ul>Principles of Information Systems, Ninth Edition
  7. 7. How the Internet Works <ul><li>Transmission Control Protocol (TCP) </li></ul><ul><ul><li>Transport-layer protocol that most Internet applications use with IP </li></ul></ul><ul><li>Backbone </li></ul><ul><ul><li>One of the Internet’s high-speed, long-distance communications links </li></ul></ul><ul><li>Uniform Resource Locator (URL) </li></ul><ul><ul><li>An assigned address on the Internet for each computer </li></ul></ul>Principles of Information Systems, Ninth Edition
  8. 8. How the Internet Works (continued) <ul><li>Internet Corporation for Assigned Names and Numbers (ICANN) </li></ul><ul><ul><li>Responsible for managing IP addresses and Internet domain names </li></ul></ul><ul><ul><li>Has authority to resolve domain name disputes </li></ul></ul><ul><li>Cyber-squatters </li></ul><ul><ul><li>Register domain names in the hope of selling them to corporations or people </li></ul></ul>Principles of Information Systems, Ninth Edition
  9. 9. How the Internet Works (continued) <ul><li>Accessing the Internet </li></ul><ul><li>Connect via LAN Server </li></ul><ul><li>Connect via Dial-up </li></ul><ul><li>Connect via High-Speed Service </li></ul><ul><li>Connect Wirelessly </li></ul>Principles of Information Systems, Ninth Edition
  10. 10. Principles of Information Systems, Ninth Edition How the Internet Works (continued)
  11. 11. Internet Service Providers <ul><li>Any company that provides individuals or organizations with access to the Internet </li></ul><ul><li>Most charge a monthly fee </li></ul>Principles of Information Systems, Ninth Edition
  12. 12. The World Wide Web <ul><li>Collection of tens of millions of server computers that work together as one in an Internet </li></ul><ul><li>Hyperlink </li></ul><ul><ul><li>Highlighted text or graphics in a Web document that, when clicked, opens a new Web page </li></ul></ul><ul><li>Web browser </li></ul><ul><ul><li>Web client software such as Internet Explorer, Firefox, and Safari used to view Web pages </li></ul></ul>Principles of Information Systems, Ninth Edition
  13. 13. Principles of Information Systems, Ninth Edition The World Wide Web (continued)
  14. 14. The World Wide Web (continued) <ul><li>Hypertext Markup Language (HTML) </li></ul><ul><ul><li>Standard page description language for Web pages </li></ul></ul><ul><li>HTML tags </li></ul><ul><ul><li>Let the browser know how to format text </li></ul></ul><ul><li>Extensible Markup Language (XML) </li></ul><ul><ul><li>Markup language for Web documents containing structured information </li></ul></ul><ul><li>Cascading Style Sheet (CSS) </li></ul><ul><ul><li>File or portion of an HTML file that defines the visual appearance of content in a Web page </li></ul></ul>Principles of Information Systems, Ninth Edition
  15. 15. Web 2.0 and the Social Web <ul><li>Web 2.0 </li></ul><ul><ul><li>The Web as a computing platform that supports software applications and the sharing of information </li></ul></ul><ul><li>Rich Internet application </li></ul><ul><ul><li>Software that has the functionality and complexity of traditional application software, but runs in a Web browser and does not require local installation </li></ul></ul>Principles of Information Systems, Ninth Edition
  16. 16. Web Programming Languages <ul><li>Java </li></ul><ul><ul><li>Object-oriented programming language from Sun Microsystems based on C++ </li></ul></ul><ul><ul><li>Allows small programs (applets) to be embedded within an HTML document </li></ul></ul><ul><li>Other languages </li></ul><ul><ul><li>Asynchronous JavaScript and XML (AJAX) </li></ul></ul><ul><ul><li>Hypertext Preprocessor (PHP) </li></ul></ul><ul><ul><li>Adobe Flash and Microsoft Silverlight </li></ul></ul>Principles of Information Systems, Ninth Edition
  17. 17. Developing Web Content <ul><li>Popular tools for creating Web pages and managing Web sites: </li></ul><ul><ul><li>Adobe Dreamweaver, Microsoft Expression Web, and Nvu </li></ul></ul><ul><li>Popular publishing options: </li></ul><ul><ul><li>ISPs, free sites, and Web hosting </li></ul></ul><ul><li>Mash-up </li></ul><ul><ul><li>Process of mixing two or more hip-hop songs into one song </li></ul></ul>Principles of Information Systems, Ninth Edition
  18. 18. Web Services <ul><li>Standards and tools that streamline and simplify communication among Web sites </li></ul><ul><li>XML </li></ul><ul><ul><li>The key to Web services </li></ul></ul>Principles of Information Systems, Ninth Edition
  19. 19. Web Services (continued) <ul><li>Other components used in Web service applications: </li></ul><ul><ul><li>SOAP (Simple Object Access Protocol) </li></ul></ul><ul><ul><li>WSDL (Web Services Description Language) </li></ul></ul><ul><ul><li>UDDI (Universal Discovery Description and Integration) </li></ul></ul>Principles of Information Systems, Ninth Edition
  20. 20. Internet and Web Applications <ul><li>Search engines and Web research </li></ul><ul><ul><li>Search engines </li></ul></ul><ul><ul><ul><li>Have become important to businesses as a tool to drive visitors to the business’ Web site </li></ul></ul></ul><ul><ul><li>SEO has become a valuable marketing tool </li></ul></ul>Principles of Information Systems, Ninth Edition
  21. 21. Principles of Information Systems, Ninth Edition Search Engines and Web Research
  22. 22. Business Uses of the Web <ul><li>Commercial Internet Exchange (CIX) Association </li></ul><ul><ul><li>Established in 1991 </li></ul></ul><ul><ul><li>Allows businesses to connect to the Internet </li></ul></ul>Principles of Information Systems, Ninth Edition
  23. 23. E-Mail, Instant Messaging, and Video Chat <ul><li>E-mail </li></ul><ul><ul><li>No longer limited to simple text messages </li></ul></ul><ul><ul><li>Can embed sound and images </li></ul></ul><ul><ul><li>Can attach files </li></ul></ul><ul><li>Instant messaging </li></ul><ul><ul><li>Online, real-time communication between two or more people who are connected to the Internet </li></ul></ul>Principles of Information Systems, Ninth Edition
  24. 24. Principles of Information Systems, Ninth Edition E-Mail, Instant Messaging, and Video Chat (continued)
  25. 25. Career Information and Job Searching <ul><li>Search engines </li></ul><ul><ul><li>Good starting point for searching for specific companies or industries </li></ul></ul><ul><li>Job sites </li></ul><ul><ul><li>www.directmarketingcareers.com </li></ul></ul><ul><ul><li>www.monster.com </li></ul></ul><ul><ul><li>www.hotjobs.com </li></ul></ul><ul><ul><li>www.careerbuilder.com </li></ul></ul>Principles of Information Systems, Ninth Edition
  26. 26. Telnet, SSH, and FTP <ul><li>Telnet </li></ul><ul><ul><li>Network protocol that enables users to log on to networks remotely over the Internet </li></ul></ul><ul><li>Secure Shell (SSH) </li></ul><ul><ul><li>Provides Telnet functionality through a more secure connection </li></ul></ul><ul><li>File Transfer Protocol (FTP) </li></ul><ul><ul><li>Supports file transfers between a host and a remote computer </li></ul></ul>Principles of Information Systems, Ninth Edition
  27. 27. Web Log (Blog), Video Log (Vlog), and Podcasting <ul><li>Web log (blog) </li></ul><ul><ul><li>Web site that people create and use to write about their observations, experiences, and feelings on a wide range of topics </li></ul></ul><ul><li>Podcast </li></ul><ul><ul><li>Audio broadcast over the Internet </li></ul></ul><ul><ul><li>An audio blog </li></ul></ul>Principles of Information Systems, Ninth Edition
  28. 28. Usenet and Newsgroups <ul><li>Usenet </li></ul><ul><ul><li>Uses e-mail to provide a centralized news service </li></ul></ul><ul><ul><li>Topic are called newsgroups </li></ul></ul><ul><ul><li>Protocol that describes how groups of messages can be stored on and sent between computers </li></ul></ul>Principles of Information Systems, Ninth Edition
  29. 29. Principles of Information Systems, Ninth Edition Usenet and Newsgroups (continued)
  30. 30. Chat Rooms <ul><li>Enable two or more people to engage in interactive “conversations” over the Internet </li></ul><ul><li>Internet Relay Chat (IRC) </li></ul><ul><ul><li>Requires participants to type their conversation rather than speak </li></ul></ul>Principles of Information Systems, Ninth Edition
  31. 31. Internet Phone and Videoconferencing Services <ul><li>Internet phone service </li></ul><ul><ul><li>Relatively inexpensive, especially for international calls </li></ul></ul><ul><li>Voice-over-IP (VoIP) technology </li></ul><ul><ul><li>Network managers can route phone calls and fax transmissions over the same network they use for data </li></ul></ul><ul><li>Internet videoconferencing </li></ul><ul><ul><li>Supports both voice and visual communications </li></ul></ul>Principles of Information Systems, Ninth Edition
  32. 32. Social Networks <ul><li>Facebook </li></ul><ul><ul><li>Provides an application development platform so that technically proficient members can create applications to run within Facebook </li></ul></ul><ul><li>The U.S. intelligence community </li></ul><ul><ul><li>Is adopting social networking to share information among operatives and analysts </li></ul></ul><ul><li>Twitter </li></ul><ul><ul><li>Allows members to report on what they are doing throughout the day </li></ul></ul>Principles of Information Systems, Ninth Edition
  33. 33. Media Sharing <ul><li>YouTube </li></ul><ul><ul><li>Allows members to post homemade video content </li></ul></ul><ul><li>Flickr </li></ul><ul><ul><li>Allows members to upload photos to their own personal online photo album and choose photos to share with the community </li></ul></ul>Principles of Information Systems, Ninth Edition
  34. 34. Social Bookmarking <ul><li>Purpose </li></ul><ul><ul><li>To provide a view of the most popular Web sites, videos, blog articles, or other Web content at any given moment </li></ul></ul><ul><li>Popular social bookmarking sites </li></ul><ul><ul><li>del.icio.us </li></ul></ul><ul><ul><li>Digg </li></ul></ul>Principles of Information Systems, Ninth Edition
  35. 35. Content Streaming <ul><li>Method for transferring multimedia files, radio broadcasts, and other content over the Internet </li></ul><ul><li>Enables users to browse large files in real time </li></ul>Principles of Information Systems, Ninth Edition
  36. 36. Shopping on the Web <ul><li>Amazon Shorts </li></ul><ul><ul><li>Has stories that vary in length from 2,000 to 10,000 words </li></ul></ul><ul><li>Bot (intelligent agent) </li></ul><ul><ul><li>Software tool that searches the Web for information, products, or prices </li></ul></ul>Principles of Information Systems, Ninth Edition
  37. 37. Web Auctions <ul><li>Web auction </li></ul><ul><ul><li>A way to connect buyers and sellers </li></ul></ul><ul><li>eBay </li></ul><ul><ul><li>Popular auction site </li></ul></ul><ul><ul><li>Easy to use and includes thousands of products and services in many categories </li></ul></ul><ul><li>Auction sites </li></ul><ul><ul><li>Cannot always determine whether the people and companies listing products and services are legitimate </li></ul></ul>Principles of Information Systems, Ninth Edition
  38. 38. Music, Radio, Video, and TV on the Internet <ul><li>Radio broadcasts are now available on the Internet </li></ul><ul><li>Video and TV are also becoming available </li></ul><ul><li>Internet Protocol Television (IPTV) protocol </li></ul><ul><ul><li>Used to put TV programming on the Internet </li></ul></ul>Principles of Information Systems, Ninth Edition
  39. 39. E-Books and Audio Books <ul><li>Digital books, both in text and audio form </li></ul><ul><ul><li>Are growing in popularity thanks to appealing devices and services </li></ul></ul><ul><li>Audio books </li></ul><ul><ul><li>Have become more popular due to the popularity of the iPod and services like audible.com </li></ul></ul>Principles of Information Systems, Ninth Edition
  40. 40. Office on the Web <ul><li>Internet office </li></ul><ul><ul><li>Web site that contains files, phone numbers, e-mail addresses, an appointment calendar, and more </li></ul></ul><ul><ul><li>Allows your desktop computer, phone books, appointment schedulers, and other important information to be with you wherever you are </li></ul></ul>Principles of Information Systems, Ninth Edition
  41. 41. Other Internet Services and Applications <ul><li>Internet </li></ul><ul><ul><li>Can provide critical information during times of disaster </li></ul></ul><ul><ul><li>Can be used to translate words, sentences, or complete documents from one language into another </li></ul></ul><ul><ul><li>Facilitates distance learning, which has dramatically increased in the last several years </li></ul></ul>Principles of Information Systems, Ninth Edition
  42. 42. Intranets and Extranets <ul><li>Intranet </li></ul><ul><ul><li>Internal corporate network built using Internet and World Wide Web standards and technologies </li></ul></ul><ul><li>Extranet </li></ul><ul><ul><li>Network that links selected resources of the intranet of a company with its customers, suppliers, or other business partners </li></ul></ul><ul><li>Virtual private network (VPN) </li></ul><ul><ul><li>Secure connection between two points on the Internet </li></ul></ul>Principles of Information Systems, Ninth Edition
  43. 43. Principles of Information Systems, Ninth Edition Intranets and Extranets (continued)
  44. 44. Net Issues <ul><li>Management issues </li></ul><ul><ul><li>Preventing attacks </li></ul></ul><ul><li>Service and speed issues </li></ul><ul><ul><li>Keeping up with Internet traffic and traffic on company intranets </li></ul></ul><ul><li>Privacy, fraud, security, and unauthorized Internet sites </li></ul><ul><ul><li>People and companies are reluctant to embrace the Internet unless these issues are successfully addressed </li></ul></ul>Principles of Information Systems, Ninth Edition
  45. 45. Summary <ul><li>The Internet started with ARPANET </li></ul><ul><li>Internet Protocol (IP) </li></ul><ul><ul><li>The set of conventions used to pass packets from one host to another </li></ul></ul><ul><li>Transmission Control Protocol (TCP) </li></ul><ul><ul><li>Other protocol used with IP </li></ul></ul><ul><li>The Web </li></ul><ul><ul><li>Collection of tens of millions of servers that work together as one in an Internet service </li></ul></ul>Principles of Information Systems, Ninth Edition
  46. 46. Summary (continued) <ul><li>Hypertext Markup Language (HTML) </li></ul><ul><ul><li>Standard page description language for Web pages </li></ul></ul><ul><li>Internet and Web applications include: </li></ul><ul><ul><li>Web browsers, e-mail, Telnet, FTP, Web logs (blogs), podcasts, Usenet and newsgroups, chat rooms </li></ul></ul><ul><li>Telnet and SSH </li></ul><ul><ul><li>Enable you to log on to remote computers </li></ul></ul><ul><li>Online social networks </li></ul><ul><ul><li>Provide Web-based tools for users to share information about themselves with others </li></ul></ul>Principles of Information Systems, Ninth Edition
  47. 47. Summary (continued) <ul><li>Intranet </li></ul><ul><ul><li>Internal corporate network built using Internet and World Wide Web standards and products </li></ul></ul><ul><li>Extranet </li></ul><ul><ul><li>Network that links selected resources of the intranet of a company with its customers, suppliers, or other business partners </li></ul></ul><ul><li>Management issues, service, and speed affect all networks </li></ul>Principles of Information Systems, Ninth Edition

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