1.  2002 Prentice Hall Chapter 11 From Internet to Information Infrastructure

2.  2002 Prentice Hall 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.  2002 Prentice Hall 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. Add the following in your HTTP header  To turn off page indexing  To turn off indexing and following However the robots may ignore Stopping the robots

5.  2002 Prentice Hall 5 Search Engines Some search engines use keywords and Boolean logic to conduct searches

6.  2002 Prentice Hall 6 Search Engines Other search engines allow searches by using a hierarchical directory or subject tree

7. All the Web AltaVista Ask Jeeves Excite Google HotBot Lycos Yahoo! Some search engines 2003

8.  2002 Prentice Hall 8 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

9.  2002 Prentice Hall 9 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.

10.  2002 Prentice Hall 10 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.

11.  2002 Prentice Hall 11 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

12.  2002 Prentice Hall 12 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

13.  2002 Prentice Hall 13 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

14.  2002 Prentice Hall 14 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.

15.  2002 Prentice Hall 15 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

16.  2002 Prentice Hall 16 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

17.  2002 Prentice Hall 17 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

18.  2002 Prentice Hall 18 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

19.  2002 Prentice Hall 19 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

20.  2002 Prentice Hall 20 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

21.  2002 Prentice Hall 21 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.

22.  2002 Prentice Hall 22 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

23.  2002 Prentice Hall 23 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

24. What is this? Akamai AOLAOL vs MSNMSN blogs eBay Google store.NET Nigerian $$$$

25.  2002 Prentice Hall 25