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Beekman5 std ppt_11


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  • 1. Chapter 11 From Internet to Information Infrastructure
  • 2. Topics
    • Internet Applications: Communication and Connection
    • The Evolving Internet
    • Internet2 and the Next Generation Internet
    • Internet Issues: Ethical and Political Dilemmas
    • Internet Everywhere: The Invisible Information Infrastructure
    • Cyberspace: The Electronic Frontier
  • 3. Internet Applications: Communication and Connection
    • Search engines are designed to make it easier to find information on the Web.
      • web crawlers or spiders --software robots that systematically search the web
  • 4. Search Engines
    • Some search engines use keywords and Boolean logic to conduct searches
  • 5. Search Engines
    • Other search engines allow searches by using a hierarchical directory or subject tree
  • 6. Portals
    • Web entry stations that offer quick and easy access to a variety of services.
      • Consumer portals includes search engines, email services, chat rooms, references, news and sports headlines, shopping malls and other services
      • Corporate portals on intranets serve the employees of particular corporations
      • Vertical portals are targeted at members of a particular industry or economic sector
  • 7. Rules of Thumb: Working the Web
    • Handle URLs with care.
    • Get to know your search engines.
    • If you’re in a hurry, dispense with frills.
    • Organize your favorite bookmarks.
    • Be selective.
    • Protect your privacy.
    • Be conscious of cookies.
    • Shop with bots.
    • Shop smart.
    • Remember why you’re there.
    • Think before you publish.
  • 8. Email on the Internet
    • What appears on the screen depends on the type of Internet connection you have and the mail program you use.
    • Popular graphical email programs include Eudora, Outlook and Netscape Communicator.
  • 9. Email on the Internet
    • Email formats include:
      • ASCII text--can be viewed by any mail client program
      • HTML--displays text formatting, pictures, and links to Web pages
  • 10. Mailing Lists & Network News
    • Mailing lists allow you to participate in email discussion groups on special-interest topics.
    • 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
  • 11. Real-Time Communication
    • Users are logged in at the same time.
      • Instant Messaging for exchanging instant messages with on-line friends and co-workers
      • Internet telephony (IP telephony) for long-distance toll-free telephone service
      • Videoconferencing for two-way meetings
  • 12. Rules of Thumb: Netiquette
    • Say what you mean and say it with care.
    • Keep it short and to the point.
    • Proofread yours messages.
    • Learn the “nonverbal” language of the Net.
    • Keep your cool.
    • Don’t be a source of spam (Internet junk mail).
    • Lurk before you leap.
    • Check your FAQs.
    • Give something back.
  • 13. Push Technology
    • The Web was built with pull technology—browsers on client computers “pull” information from server machines.
      • Browser asks for information
    • With push technology , information is delivered automatically to the client computer .
      • New product descriptions
      • Automatic software upgrades
      • Updated news
  • 14. Peer-to-Peer and Grid Computing
    • Peer-to-Peer (P2P) computing - users share music, movies, and other files without going through a central directory.
    • Grid computing - anyone can plug in from anywhere and rent processing power and software from anywhere on the Net
  • 15. Intranets, Extranets and Electronic Commerce
    • Intranets are self-contained intra-organizational networks that offer email, newsgroups, file transfer, Web publishing and other Internet-like services.
    • Firewalls prevent unauthorized communication and secure sensitive internal data
  • 16. Intranets, Extranets and Electronic Commerce
    • Extranets are private TCP/IP networks designed for outside use by customers, clients and business partners of the organization.
      • electronic data interchange (EDI - a decade-old set of specifications for ordering, billing, and paying for parts and services over private networks
  • 17. Intranets, Extranets and Electronic Commerce
    • Electronic commerce involves business transactions through electronic networks.
      • Business-to-business (B2B) e-commerce - transactions that involve businesses providing goods or services to other businesses
      • 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
  • 18. Web Services
    • Web services involve new kinds of Web-based applications that can be assembled quickly using existing software components
    • Examples:
      • plug a shopping-cart component into an existing Web site
      • design applications that can be accessed through a variety of Web-enabled devices
  • 19. The Evolving Internet
    • Internet2 launched by the government and various corporations in 1998 to provide faster network communications for universities and research institutions.
    • Next Generation Internet (NGI), will consist of a nationwide web of optical fiber integrated with intelligent management software to maintain high-speed connections.
  • 20. Internet Issues: Ethical and Political Dilemmas
    • Filtering software to combat inappropriate content
    • Digital cash to make on-line transactions easier and safer
    • Encryption software to prevent credit card theft
    • Digital signatures to prevent email forgery
  • 21. Internet Everywhere: The Invisible Information Infrastructure
    • Blurring of the boundaries between the Web and interpersonal communication applications
    • A variety of Internet appliances, network computers, set-top boxes, PDAs, mobile phones, and other devices connected to the Internet in offices and homes
    • “ In the future, everything with a digital heartbeat will be connected to the Internet.”
            • Scott McNealy , CEO of Sun Microsystems
  • 22.