Is2034 week 2
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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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Is2034 week 2

IS2034 - Week 2

  • Living in the Information Age

  • The International Information Society and YOU!

  • SC Chap 7


Introduction

Introduction

  • Telecommunications (networks)

  • Applications (software programmes)

  • An information superhighway ~ Internet

  • The irrelevance of physical distance

  • An electronic village?

  • Challenges and opportunities?

  • Business Possibilities?


What is the internet

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.


How does information flow on the internet 1

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


How does information flow on the internet 2

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


Internet applications

Internet Applications

  • World Wide Web (WWW, W3, Web)

  • Electronic Mail (Email)

  • File Transfer Protocol (FTP)

  • Telnet


World wide web www w3 web

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


Www characteristics

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


Www browsers

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


Www more features

WWW - More Features

  • Saving documents

  • Saving pictures

  • Expired links

  • Cookies

  • Privacy and security.

  • Problems with graphic intensive pages


Www searching for information

WWW - Searching for Information

  • Portals

    • YahooAltavistaLycos

  • Search Engines

    • InfindFast

  • Intelligent Searching and Asking

  • Proxy Servers

  • Limitations - cost, censorship, freedom


Email

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

  • [email protected]


Is2034 week 2

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


Telnet

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.


Others

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


Intranets and extranets 9 32 33

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


Doing business on the internet electronic commerce ec

Doing Business on the Internet:Electronic Commerce (EC)


Doing business on the internet 1

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?


Doing business on the internet 2

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


Doing business on the internet 3 examples

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


The future of the www

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?


Predictions

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?


Information superhighway

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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