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IS2034 - Week 2

IS2034 - Week 2. Living in the Information Age The International Information Society and YOU ! SC Chap 7. Introduction. Telecommunications (networks) Applications (software programmes) An information superhighway ~ Internet The irrelevance of physical distance An electronic village?

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IS2034 - Week 2

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  1. IS2034 - Week 2 • Living in the Information Age • The International Information Society and YOU! • SC Chap 7

  2. Introduction • Telecommunications (networks) • Applications (software programmes) • An information superhighway ~ Internet • The irrelevance of physical distance • An electronic village? • Challenges and opportunities? • Business Possibilities?

  3. What is the Internet? • Networks - computers "connected" by "media" and software • Internet - network of networks • Ownership and management • Origins - ARPANET - 1969 • Worldwide connectivity (almost) • Uses of the Internet.

  4. How does information flow on the Internet? - 1 • Clients and Servers • "Packet switching" and "routing" • Direct Providers - Companies, Universities • Internet Service Providers (ISPs) • Asiaonline, Hong Kong Supernet, Netvigator • Backbones, dedicated and leased lines

  5. How does information flow on the Internet? - 2 • Internet Addresses and domain names • Uniqueness of the IP Address • International format of addresses • 144.214.2.1 - or - cityu.edu.hk • hippo.ru.ac.za - or - 146.231.128.1 • edu, com, int, org, gov, net, hk, br, jp, cn,... • Non-standard Address Formats • bu.edu, scmp.com, hk.super.net

  6. Internet Applications • World Wide Web (WWW, W3, Web) • Electronic Mail (Email) • File Transfer Protocol (FTP) • Telnet

  7. World Wide Web - WWW, W3, Web • Information linked to information. • The use of hyperlinks • HTTP - HyperText Transfer Protocol • Multimedia plug-ins (7.12-13) • Java applets, ActiveX (12.31) • Text, audio, graphics, animation, video, … • Webcasting - information pushed to you • Web publishing • Webmaster

  8. WWW Characteristics • Why are hyperlinks powerful? • What are the limitations of the WWW? • Speed, Volume, Cost, Accessibility, Usefulness • How do web pages actually work? • HTML - Hypertext Markup Language • Marked-up text and Tags • Surfing the web

  9. WWW - Browsers • To view web pages, you need a Web Browser - Netscape, Mosaic, Microsoft Internet Explorer • Home Pages • URLs - Uniform Resource Locators • History Lists • Bookmarks • permanence

  10. WWW - More Features • Saving documents • Saving pictures • Expired links • Cookies • Privacy and security. • Problems with graphic intensive pages

  11. WWW - Searching for Information • Portals • Yahoo Altavista Lycos • Search Engines • Infind Fast • Intelligent Searching and Asking • Proxy Servers • Limitations - cost, censorship, freedom

  12. Email • Very widely used as a communication tool • Sending messages from person to person (1 to 1), or person to people (1 to many) • Messages are usually text, but can also include attachments • Creating, Sending, Receiving, Saving, Forwarding, Deleting • Address Books and IP Addresses • isrobert@is.cityu.edu.hk

  13. FTP • Exchange files with other computers on the Internet • Freeware or shareware files. • Files may be compressed • Access may be restricted to those who have accounts/passwords on the computers • Anonymous logins

  14. Telnet • Permits logins to remote computers • Access services provided by the remote computer • Library catalogue access • Access to your mainframe-based email account when outside CityU • Telnet becoming less popular as the WWW takes over.

  15. Others • Newsgroups - online typed discussion on a particular subject. • Mailing lists - info sent to a list of email addresses • Chat Rooms - real-time typed conversation

  16. Intranets (and extranets)(9.32-33) • You can see that the Inernet is a powerful tool and that the WWW can be a useful way to deliver information. • Some organisations have now adapted these technologies to their own internal use, i.e. for internal information. • This is known as an Intranet • Access to an Intranet is only possible to members of the organisation

  17. Doing Business on the Internet:Electronic Commerce (EC)

  18. Doing Business on the Internet - 1 • Use of the Internet for advertising and promotion • Use of the Internet for Sales and Service provision • Use of the Internet for information delivery • Use of the Internet for home entertainment • Misuse of the Internet?

  19. Doing Business on the Internet - 2 • 24-hours a day access • Global Presence • Lower Marketing Costs • Lower Employee Costs (salaries) • Lower Storage Costs • Feedback - 2 way communications • Working Around the clock

  20. Doing Business on the Internet - 3Examples: • Global Organisations • Hotels • Travel Agents and Airlines - CX • HK Telecom - Interactive TV • http://www.hktitv.com • Park'nShop • Newspapers

  21. The Future of the WWW? • Faster? Slower? • Cheaper? More expensive? • Better?? Worse? The same? • More integrated with our lives? • More effective searching for information? • Security? • Privacy?

  22. Predictions • The primary channel of communication? • An integral part of education? • The cause of World War 3? • One network for telephone, TV, radio, computer,…? • All electronic devices connected - microwave, washing machine, computer,…? You?

  23. Information Superhighway • A network of high-speed data communications links that will eventually connect virtually every facet of our society. • Do you believe it? • Do you want it?

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