1. What is the Internet? 11/27/07

2. Where did the Internet start?  Networked computers started by Military  ARPANET – 1969 experiment by the Defense department  During war email part became popular  Soon became a problem  Protocols were developed  Evolved into today’s Internet

3. World Wide Web  Internet went unnoticed for several decades  1989 – Tim Berners-Lee proposed an idea at CERN (a physics lab in Europe)  Envisioned a network to organize info in pages that were connected by selectable text – hyperlinks  Became popular with researchers

4.  1993 – Graphical User Interface was introduced  Mosaic released as 1 st graphical web browser  Web is only part of the internet

5. Internet Service Providers  Who we get our service from  For a fee  Examples: ATT, AOL, Sprint, EarthLink, Comcast Cable  Provide access to World Wide Web, email, other resources

6. Content Providers  Supply info to Internet  Commercial businesses  Nonprofit organizations  Educational institutions  Individuals

7. Application Service Providers  Companies that manage/distribute software-based services  Rent software access  Examples: office suites, accounting programs  Web Services

8. Infrastructure Companies  Enterprises that own/operate paths of the Internet  Telephone, satellite, and cable companies

9. Hardware/software companies  Companies that make/distribute products used with internet

10. How do I find info?

11. Internet Addresses  IP address – Internet Protocol address  Uniquely identifies each computer or device  Example  216.239.39.99 Identifies specific computer

12. Domain Name  IP hard to remember  Domain name – text version  www.google.com  Examples of domain names:  Com - commercial  Edu - education  Gov - government  Mil - military  Net – network provider  Org – non-profit organization

13. Web Addresses  URL – Uniform Resource Locator  http://www.us- parks.com/grand_canyon/scenic_vistas.html http://www.us- parks.com/grand_canyon/scenic_vistas.html http://www.us- parks.com/grand_canyon/scenic_vistas.html  http: - Hypertext Transfer Protocol – sets rules how pages transfer on the Internet  www.us-parks.com – domain name www.us-parks.com  grand_canyon – path to the server grand_canyon  scenic_vistas.html – web page name scenic_vistas.html