1. 2015/6/11 1 1 Using Information Technology Chapter 2 – Page 35 - 66 The Internet & the World Wide Web

2. 2 Copyright © 2003. Exclusive rights by The McGraw-Hill Companies, Inc. 2015/6/11 2 The Internet & the World Wide Web Exploring Cyberspace 2.1 Choosing Your Internet Access Device & Physical Connection: The Quest for Broadband 2.2 Choosing Your Internet Service Provider (ISP) 2.3Sending & Receiving E-Mail 2.4The World Wide Web 2.5The Online Gold Mine: More Internet Resources, Your Personal Cyberspace, E-Commerce, & the E- conomy

3. The Internet & the World Wide Web 3 Copyright © 2003. Exclusive rights by The McGraw-Hill Companies, Inc. 2015/6/11 3 2.1 Choosing Your Internet Access Device & Physical Connection: The Quest for Broadband Bandwidth - an expression of how much data can be sent through a communications channel in a given amount of time Broadband - very high speed connection

4. The Internet & the World Wide Web 4 Copyright © 2003. Exclusive rights by The McGraw-Hill Companies, Inc. 2015/6/11 4 Download - to transmit data from a remote computer to a local computer Upload - to transmit data from a local computer to a remote computer

5. The Internet & the World Wide Web 5 Copyright © 2003. Exclusive rights by The McGraw-Hill Companies, Inc. 2015/6/11 5 Telephone (Dial-Up) Modem: Low Speed but Inexpensive & Widely Available Modem - device that sends and receives data over telephone lines to and from computers Most modems today have a maximum speed of 56 Kbps.

6. The Internet & the World Wide Web 6 Copyright © 2003. Exclusive rights by The McGraw-Hill Companies, Inc. 2015/6/11 6 High-Speed Phone Lines: More Expensive but Available in Most Cities ISDN - hardware and software that allows voice, video, and data to be communicated over traditional copper-wire telephone lines, up to 128K bps DSL - also uses regular phone lines but much faster than ISDN, could be up to 2 Mbps T1 - a traditional trunk line that carries 24 normal telephone circuits and has a transmission rate of 1.5 Mbps T2 – 6 Mbps

7. The Internet & the World Wide Web 7 Copyright © 2003. Exclusive rights by The McGraw-Hill Companies, Inc. 2015/6/11 7 Cable Modem: Close Competitor to DSL Cable modem - connects a personal computer to a cable-TV system that offers an Internet connection Wireless Systems: Satellite & Other Through- the-Air Connections Satellite Radio waves between cellular towers Wireless Systems: Satellite & Other Through- the-Air Connections Satellite Radio waves between cellular towers

8. The Internet & the World Wide Web 8 Copyright © 2003. Exclusive rights by The McGraw-Hill Companies, Inc. 2015/6/11 8 2.2 Choosing Your Internet Service Provider (ISP) ISP - a company that connects you through your communications line to its servers, or central computer, which connect you to the Internet via another company’s network access points Example, netvigator, icable etc.

9. The Internet & the World Wide Web 9 Copyright © 2003. Exclusive rights by The McGraw-Hill Companies, Inc. 2015/6/11 9 2.3 Sending & Receiving E-Mail E-Mail Software & Carriers Buy e-mail software Get e-mail program as part of other computer software (such as browser) Get e-mail software as part of your ISP package Get free e-mail services

10. The Internet & the World Wide Web 10 Copyright © 2003. Exclusive rights by The McGraw-Hill Companies, Inc. 2015/6/11 10 E-Mail Addresses Jane_Doe@earthlink.net.uk User name: Jane_Doe Domain name: earthlink Top-level domain:.net Two-letter country extension:.uk

11. The Internet & the World Wide Web 11 Copyright © 2003. Exclusive rights by The McGraw-Hill Companies, Inc. 2015/6/11 11 Instant Messaging Instant messaging (IM) - allows any user on a given e-mail system to send a message and have it pop up instantly on the screen of anyone else logged onto that system Mailing Lists: E-Mail- Based Discussion Groups List-serves - e-mail mailing lists of people who regularly participate in discussion groups Mailing Lists: E-Mail- Based Discussion Groups List-serves - e-mail mailing lists of people who regularly participate in discussion groups

12. The Internet & the World Wide Web 12 Copyright © 2003. Exclusive rights by The McGraw-Hill Companies, Inc. 2015/6/11 12 Netiquette: Appropriate Online Behavior Consult FAQs Emoticons Avoid flamingDon’t SHOUT!

13. The Internet & the World Wide Web 13 Copyright © 2003. Exclusive rights by The McGraw-Hill Companies, Inc. 2015/6/11 13 NetiquetteNetiquette: Appropriate Online Behavior Avoid sloppiness but avoid criticizing others’ sloppiness Don’t send huge file attachments, unless requested When replying, quote only the relevant portion!

14. The Internet & the World Wide Web 14 Copyright © 2003. Exclusive rights by The McGraw-Hill Companies, Inc. 2015/6/11 14 Spam: Unwanted Junk E-Mail Delete without opening the message Never reply to a spam message! Enlist the help of your ISP or use spam filters Fight back

15. The Internet & the World Wide Web 15 Copyright © 2003. Exclusive rights by The McGraw-Hill Companies, Inc. 2015/6/11 15 2.4 The World Wide Web Q: What makes the Web graphically inviting? A: Multimedia Q: What makes the Web easily navigable? A: Hypertext HTML & resulting page

16. The Internet & the World Wide Web 16 Copyright © 2003. Exclusive rights by The McGraw-Hill Companies, Inc. 2015/6/11 16 The Web & How It Works Website--the domain on the computerdomain Site - a computer with a domain name Example: barnesandnobleuniversity.combarnesandnobleuniversity.com Website - the location of a web domain name in a computer somewhere on the Internet

17. The Internet & the World Wide Web 17 Copyright © 2003. Exclusive rights by The McGraw-Hill Companies, Inc. 2015/6/11 17 The Web & How It Works Web pages--the documents on a website Web page - a document on the WWW that can include text, pictures, sound, and video Example: Barnes & Noble University’s Science & Technology Campus Science & Technology Campus

18. The Internet & the World Wide Web 18 Copyright © 2003. Exclusive rights by The McGraw-Hill Companies, Inc. 2015/6/11 18 The Web & How It Works Browsers--software for connecting with websites Web browser - software that enables users to view web pages and to jump from one page to another Best-known browsers: Microsoft’s Internet Explorer Netscape Navigator

19. The Internet & the World Wide Web 19 Copyright © 2003. Exclusive rights by The McGraw-Hill Companies, Inc. 2015/6/11 19 The Web & How It Works URLs--addresses for web pages http://www.nps.gov/abli/index.htm Protocol : http:// Domain name: www.nps.gov Directory name: abli File name: index.htm

20. The Internet & the World Wide Web 20 Copyright © 2003. Exclusive rights by The McGraw-Hill Companies, Inc. 2015/6/11 20 Using Your Browser to Get Around the Web Home page - the first page you see when you start up your browser Getting around: Back - takes you back to the previous page Forward - takes you to a page you returned from Home - takes you to your home page

21. The Internet & the World Wide Web 21 Copyright © 2003. Exclusive rights by The McGraw-Hill Companies, Inc. 2015/6/11 21 Using Your Browser to Get Around the Web History list - list accessible from browser’s toolbar that allows you to return to a page you have recently visited Bookmarks or favorites - your favorite URLs stored in a list to permit frequent visits without retyping the URLs Simultaneous viewing of two pages via File menu’s “New” item

22. The Internet & the World Wide Web 22 Copyright © 2003. Exclusive rights by The McGraw-Hill Companies, Inc. 2015/6/11 22 Using Your Browser to Get Around the Web Interactivity--hyperlinks, radio buttons, and fill-in text boxes Radio buttonsRadio buttons - little circles located in front of various options; selecting an option with the mouse places a dot in the corresponding circle Radio buttons and textbox

23. The Internet & the World Wide Web 23 Copyright © 2003. Exclusive rights by The McGraw-Hill Companies, Inc. 2015/6/11 23 Web Portals: Starting Points for Finding Information Web portal - website that groups together in one convenient location popular features such as search tools, e-mail, electronic commerce, and discussion groups

24. The Internet & the World Wide Web 24 Copyright © 2003. Exclusive rights by The McGraw-Hill Companies, Inc. 2015/6/11 24 Web Portals: Starting Points for Finding Information After logging on, you can: Check the home page for general info Use the directories to find a topic Use keyword to search for a topic

25. The Internet & the World Wide Web 25 Copyright © 2003. Exclusive rights by The McGraw-Hill Companies, Inc. 2015/6/11 25 Four Types of Search Engines Human-organized search sites Computer-created search sites Hybrid search sites Metasearch sites

26. The Internet & the World Wide Web 26 Copyright © 2003. Exclusive rights by The McGraw-Hill Companies, Inc. 2015/6/11 26 Summary Bandwidth: telephone line 56K bps, ADSL: 2 Mbps, T1, 1.5 Mbps ISP: Internet Service Provider: PCCW, Netvigator, icable Browser: IE Explorer 6.0, and Netscape 6.0 Search Engine: Altavista, Timway (Hong Kong) Portal: Yahoo, Geocities