Download
unit 3 n.
Skip this Video
Loading SlideShow in 5 Seconds..
Unit 3 PowerPoint Presentation

Unit 3

3 Vues Download Presentation
Télécharger la présentation

Unit 3

- - - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript

  1. Unit 3 The Internet and the World Wide Web

  2. What is the Internet? • Connected computers • Started in 1960s! • Used by gov’t, education, military • Each contains info

  3. Other Terms for Internet • The Net • Info Superhighway • Cyber-space

  4. Internet vs. WWW Internet • Physical make-up World Wide Web • Collection of info But used interchangeably

  5. What to Do on Internet • Electronic mail • Information • Shopping • Download Programs • Games/Entertainment • Discussion Groups

  6. Format of the Web • Web Site • Home page • URL • Hypertext links

  7. How to Access the Web • Use a Browser • Netscape • Internet Explorer • NSCA Mosaic • Use Unix (pros)

  8. URL Addresses

  9. Browser Features • Open a site with URL • Back & forward • History • Bookmarks • Options: Graphics off

  10. Search Engines • Yahoo • AltaVista • Infoseek • Excite

  11. Shopping on the Web • Shopping Malls • Security issues • E-cash

  12. New Developments • Old: Text & Graphics • Sound • Video & Animation • 3-D Worlds • Java (cross-platform)

  13. Info Transfer Terms • Upload • Download

  14. How to Connect • Computer • Program (browser) • Modem • ISP

  15. Private Local Regional National Commercial AOL Compuserve Prodigy Kinds of ISPs Internet Service Provider

  16. How Info Transfers • Backbone (spine) • Router (nerves) • Packets (message) • TCP/IP (language) • Download Information