Beekman5 std ppt_11


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Beekman5 std ppt_11

  1. 1. Chapter 11 From Internet to Information Infrastructure
  2. 2. Topics <ul><li>Internet Applications: Communication and Connection </li></ul><ul><li>The Evolving Internet </li></ul><ul><li>Internet2 and the Next Generation Internet </li></ul><ul><li>Internet Issues: Ethical and Political Dilemmas </li></ul><ul><li>Internet Everywhere: The Invisible Information Infrastructure </li></ul><ul><li>Cyberspace: The Electronic Frontier </li></ul>
  3. 3. Internet Applications: Communication and Connection <ul><li>Search engines are designed to make it easier to find information on the Web. </li></ul><ul><ul><li>web crawlers or spiders --software robots that systematically search the web </li></ul></ul>
  4. 4. Search Engines <ul><li>Some search engines use keywords and Boolean logic to conduct searches </li></ul>
  5. 5. Search Engines <ul><li>Other search engines allow searches by using a hierarchical directory or subject tree </li></ul>
  6. 6. Portals <ul><li>Web entry stations that offer quick and easy access to a variety of services. </li></ul><ul><ul><li>Consumer portals includes search engines, email services, chat rooms, references, news and sports headlines, shopping malls and other services </li></ul></ul><ul><ul><li>Corporate portals on intranets serve the employees of particular corporations </li></ul></ul><ul><ul><li>Vertical portals are targeted at members of a particular industry or economic sector </li></ul></ul>
  7. 7. Rules of Thumb: Working the Web <ul><li>Handle URLs with care. </li></ul><ul><li>Get to know your search engines. </li></ul><ul><li>If you’re in a hurry, dispense with frills. </li></ul><ul><li>Organize your favorite bookmarks. </li></ul><ul><li>Be selective. </li></ul><ul><li>Protect your privacy. </li></ul><ul><li>Be conscious of cookies. </li></ul><ul><li>Shop with bots. </li></ul><ul><li>Shop smart. </li></ul><ul><li>Remember why you’re there. </li></ul><ul><li>Think before you publish. </li></ul>
  8. 8. Email on the Internet <ul><li>What appears on the screen depends on the type of Internet connection you have and the mail program you use. </li></ul><ul><li>Popular graphical email programs include Eudora, Outlook and Netscape Communicator. </li></ul>
  9. 9. Email on the Internet <ul><li>Email formats include: </li></ul><ul><ul><li>ASCII text--can be viewed by any mail client program </li></ul></ul><ul><ul><li>HTML--displays text formatting, pictures, and links to Web pages </li></ul></ul>
  10. 10. Mailing Lists & Network News <ul><li>Mailing lists allow you to participate in email discussion groups on special-interest topics. </li></ul><ul><li>A newsgroup is a public discussion on a particular subject consisting of notes written to a central Internet site and redistributed through a worldwide newsgroup network called Usenet </li></ul>
  11. 11. Real-Time Communication <ul><li>Users are logged in at the same time. </li></ul><ul><ul><li>Instant Messaging for exchanging instant messages with on-line friends and co-workers </li></ul></ul><ul><ul><li>Internet telephony (IP telephony) for long-distance toll-free telephone service </li></ul></ul><ul><ul><li>Videoconferencing for two-way meetings </li></ul></ul>
  12. 12. Rules of Thumb: Netiquette <ul><li>Say what you mean and say it with care. </li></ul><ul><li>Keep it short and to the point. </li></ul><ul><li>Proofread yours messages. </li></ul><ul><li>Learn the “nonverbal” language of the Net. </li></ul><ul><li>Keep your cool. </li></ul><ul><li>Don’t be a source of spam (Internet junk mail). </li></ul><ul><li>Lurk before you leap. </li></ul><ul><li>Check your FAQs. </li></ul><ul><li>Give something back. </li></ul>
  13. 13. Push Technology <ul><li>The Web was built with pull technology—browsers on client computers “pull” information from server machines. </li></ul><ul><ul><li>Browser asks for information </li></ul></ul><ul><li>With push technology , information is delivered automatically to the client computer . </li></ul><ul><ul><li>New product descriptions </li></ul></ul><ul><ul><li>Automatic software upgrades </li></ul></ul><ul><ul><li>Updated news </li></ul></ul>
  14. 14. Peer-to-Peer and Grid Computing <ul><li>Peer-to-Peer (P2P) computing - users share music, movies, and other files without going through a central directory. </li></ul><ul><li>Grid computing - anyone can plug in from anywhere and rent processing power and software from anywhere on the Net </li></ul>
  15. 15. Intranets, Extranets and Electronic Commerce <ul><li>Intranets are self-contained intra-organizational networks that offer email, newsgroups, file transfer, Web publishing and other Internet-like services. </li></ul><ul><li>Firewalls prevent unauthorized communication and secure sensitive internal data </li></ul>
  16. 16. Intranets, Extranets and Electronic Commerce <ul><li>Extranets are private TCP/IP networks designed for outside use by customers, clients and business partners of the organization. </li></ul><ul><ul><li>electronic data interchange (EDI - a decade-old set of specifications for ordering, billing, and paying for parts and services over private networks </li></ul></ul>
  17. 17. Intranets, Extranets and Electronic Commerce <ul><li>Electronic commerce involves business transactions through electronic networks. </li></ul><ul><ul><li>Business-to-business (B2B) e-commerce - transactions that involve businesses providing goods or services to other businesses </li></ul></ul><ul><ul><li>Business-to-consumer (B2C) e-commerce - transactions that take place on the Internet, rather than an extranet, because consumers don’t have access to private extranets </li></ul></ul>
  18. 18. Web Services <ul><li>Web services involve new kinds of Web-based applications that can be assembled quickly using existing software components </li></ul><ul><li>Examples: </li></ul><ul><ul><li>plug a shopping-cart component into an existing Web site </li></ul></ul><ul><ul><li>design applications that can be accessed through a variety of Web-enabled devices </li></ul></ul>
  19. 19. The Evolving Internet <ul><li>Internet2 launched by the government and various corporations in 1998 to provide faster network communications for universities and research institutions. </li></ul><ul><li>Next Generation Internet (NGI), will consist of a nationwide web of optical fiber integrated with intelligent management software to maintain high-speed connections. </li></ul>
  20. 20. Internet Issues: Ethical and Political Dilemmas <ul><li>Filtering software to combat inappropriate content </li></ul><ul><li>Digital cash to make on-line transactions easier and safer </li></ul><ul><li>Encryption software to prevent credit card theft </li></ul><ul><li>Digital signatures to prevent email forgery </li></ul>
  21. 21. Internet Everywhere: The Invisible Information Infrastructure <ul><li>Blurring of the boundaries between the Web and interpersonal communication applications </li></ul><ul><li>A variety of Internet appliances, network computers, set-top boxes, PDAs, mobile phones, and other devices connected to the Internet in offices and homes </li></ul><ul><li>“ In the future, everything with a digital heartbeat will be connected to the Internet.” </li></ul><ul><ul><ul><ul><ul><li>Scott McNealy , CEO of Sun Microsystems </li></ul></ul></ul></ul></ul>
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