Internet

1
Internet

• Chapter 9

2
Early Computers

• Morse telegraph
• Difference Engine
• Atanasoffs electronic computer
• ENIAC

3
Internet Precursors

• WANs and LANs
• Modems
• ARPANET
• Videotex
• BBS

4
Early Internet

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

5
Computer Technology

• Short 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

6
Computer Technology
7
Internet Standards

• TCP/IP
• 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

8
Internet Technologies
9
Internet Trends

• Modems 56kbs
• Broadband
• Can carry multimedia
• Cable DSL
• WiFi
• Streaming
• Real-time distribution
• Content live or recorded
• Quality issues remain

10
Programming Lingo

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

11
Internet Security

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

12
Internet Industry

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

13
Internet Industry
14
Internet Addresses

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

15
Online Entertainment

• Music film
• File sharing
• Pay services
• Gaming
• Multiplayer
• Gambling
• E-publishing

16
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

17
Online Information

• Portals
• Search Engines
• Communities

18
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

19
Digital Divide

• U.S.
• 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

20
Issues

• Corporate Hegemony
• MS, AOL
• Government censorship
• Piracy
• File sharing