
Unit 3 The Internet and the World Wide Web
What is the Internet? • Connected computers • Started in 1960s! • Used by gov’t, education, military • Each contains info
Other Terms for Internet • The Net • Info Superhighway • Cyber-space
Internet vs. WWW Internet • Physical make-up World Wide Web • Collection of info But used interchangeably
What to Do on Internet • Electronic mail • Information • Shopping • Download Programs • Games/Entertainment • Discussion Groups
Format of the Web • Web Site • Home page • URL • Hypertext links
How to Access the Web • Use a Browser • Netscape • Internet Explorer • NSCA Mosaic • Use Unix (pros)
Browser Features • Open a site with URL • Back & forward • History • Bookmarks • Options: Graphics off
Search Engines • Yahoo • AltaVista • Infoseek • Excite
Shopping on the Web • Shopping Malls • Security issues • E-cash
New Developments • Old: Text & Graphics • Sound • Video & Animation • 3-D Worlds • Java (cross-platform)
Info Transfer Terms • Upload • Download
How to Connect • Computer • Program (browser) • Modem • ISP
Private Local Regional National Commercial AOL Compuserve Prodigy Kinds of ISPs Internet Service Provider
How Info Transfers • Backbone (spine) • Router (nerves) • Packets (message) • TCP/IP (language) • Download Information