Internet Chapter 9.

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Presentation transcript:

Internet Chapter 9

Early Computers Morse telegraph Difference Engine Atanasoff’s electronic computer ENIAC

Internet Precursors WANs and LANs Modems ARPANET Videotex BBS

Early Internet BITNET, USENET NSFNET Apple 1991 Becomes Internet Apple Hypercard Graphics based navigation 1991 First commercial Internet use Berners-Lee invents HTML & WWW 1993 Mosaic/Netscape graphical browser

Computer Technology Short term memory Long term memory RAM Long term memory Hard drive, disks, CD-R Central processing unit ‘brain’ of computer Peripherals Navigation & specialized tasks Software Instructions Interface CRT, mouse, GUI

Computer Technology

Internet Standards TCP/IP SMTP DNS IRC Key Internet protocol Helps computers recognize Internet files SMTP Email protocol Send and retrieve messages, encryption DNS Web addresses IRC Chat protocol, recognition of chat software

Internet Technologies

Internet Trends Modems 56kbs Broadband Streaming Can carry multimedia Cable & DSL WiFi Streaming Real-time distribution Content ‘live’ or recorded Quality issues remain

Programming Lingo DHTML XML WML CGI Plug-ins Configures motion graphics XML Custom page arrangement WML Strips display for wireless devices CGI Scripts that dictate interactive information exchange Plug-ins Flash movies

Internet Security Cookies Encryption Programs that track Internet navigation, send information back to originator Encryption Encoding files to provide security Public key Symmetrical key

Internet Industry 1990s e-commerce explosion Microsoft AOL 1999 dot-com bust shakes out industry Microsoft Applications Browser Multimedia player AOL Top ISP Chat, groups, news, media services

Internet Industry

Internet Addresses URL Top level domain name Uniform resource locator http://www.odu.edu Top level domain name .com .edu .org .gov .mil .net .biz

Online Entertainment Music & film Gaming E-publishing File sharing Pay services Gaming Multiplayer Gambling E-publishing

Online Information Blogs Web logs Amateur & professional commentary with interlinking news pages Easy to build and maintain Blog software free or low cost New accountability for mainstream press

Online Information Portals Search Engines Communities

Online Activities Nearly 300 million users worldwide New languages becoming common Email most common activity Evolving advertising models For-profit sector of Web still minority Content personalization myWeb

Digital Divide U.S. Global disparity in access Home computer ownership 75 percent Most of those homes connected to Internet Minority & low-income homes still unconnected Global disparity in access Phone lines scarce in developing world Wireless solutions offer some promise

Issues Corporate Hegemony Government censorship Piracy MS, AOL File sharing