1. The Internet

2. What is the Internet? A community with about 100 million users Available in almost every country about 160,000 people are added each month about 100 companies are added each week

3. How did it start? In early 1969, as ARPANET – ARPA = Advanced Research Projects Agency – A division of the Department of Defense There were four computers connected – University of Utah; University of California, Santa Barbara; University of California, Los Angeles; and Stanford. Designed to demonstrate the feasibility of building networks over a wide area

4. What was the purpose? The military wanted a reliable system that, even if one computer site was destroyed, the rest would continue to function

5. 1972: Publicly demonstrated with a total of 50 universities. 1990: The Internet funded by both government and private industry. 1993: The World Wide Web was “created”. – only about 100 web servers at that time 1994 only about 14% of web sites were commercial -- now it is over 90% Timeline

6. Internet Size vs. Web Size Internet size – Number of web servers on the web doubles every year Web size – Number of pages doubles every few months

7. Who owns the Internet? no one and everyone the Internet Society – proposes guidelines for the technical development of the Internet – decides which protocols to support InterNIC – controls the registration of Internet addresses (domain names)

8. What can your transfer Any digital media – pictures – sounds – movies – text – anything that a computer can store or that can be digitized

9. Applications World Wide Web – a retrieval system based on technology that organizes information into pages and uses a browser to display the pages Gopher: – The forerunner of the Web, not graphical

10. Applications: Telnet: – Allows you connect one computer to another FTP: – Allows you to transfer a file from one machine to another.

11. Applications (cont.) E-Mail: – Send a message from one user to another – Chain letters – You're not anonymous! Chat: – Internet Relay Chat (IRC) – Voice Chat

12. Applications (cont.) Mailing lists Usenet or News groups: – A collection of groups that discuss anything and everything.

13. Terms of The World Wide Web web page web site, home page web server web Browser URL: Universal Resource Locator – how to get there://where to go/what to get HTTP: Hyper Text Transfer Protocol HTML: Hyper Text Markup Language

14. Terminology (cont.) hyperlink: A link on a web page that will take you to other web pages. Can be text or graphical (hypermedia). search engine: A way to search for information in the Web. Uses key words from the Web page title.

15. Access providers. Provide you access to the Internet at a cost Commercial Online Services – America Online (AOL) – Microsoft Network (MSN) Internet Service Providers (ISP) – Wyoming.com, Lariat

16. Using the Internet. The people in the Internet are the same people as in the real world. Information on the Internet can be wrong.