1. THE INTERNET AND THE WORLD WIDE WEB

2. Univ. of California at Santa Barbara Univ. of California at Los Angeles Univ. of Utah Stanford Research Institute ARPANET—Predecessor to the Internet 1969—4 computers

3. The World Wide Web  Way of accessing information over the Internet  Began in 1989  Tim Berners-Lee  Characterized by Hyperlinks The Internet  Massive ‘network of networks’ connecting computers  Began in 1969

4. How the World Wide Web Works: Berners-Lee developed the three technical keystones of the Web: (1)the language for encoding documents (HTML, Hypertext Markup Language); (2) the system for linking documents (HTTP, Hypertext Transfer Protocol); and the (3) www.whatever system for addressing documents (URL, Uniform Resource Locator).

5. HYPERTEXT MARKUP LANGUAGE (HTML) HTML--primary coding system for Web pages. Hyperlinks are buttons, highlighted or underlined text that send the user to a related document.

6. A protocol--set of rules and procedures for exchanging information among computers on a network. HTTP: HYPERTEXT TRANSFER PROTOCOL Hyperlink—method of navigating between sites.

7. URL (UNIFORM RESOURCE LOCATOR). URL--address of an Internet file. Usually 4 parts--protocol, server, path and filename. http://www.microsoft.com/windows/default.asp protocolserverpathfilename

8. What are domains? Divide the WWW into categories based on the nature of their owner and form part of a site’s address, or URL. Common domain names are:.com commercial enterprises.orgnon-profit organizations.netfor networks.edufor educational organizations.govfor government organizations.mil for military services Based on this, could you guess some URLs?

9. INTERNET SERVICE PROVIDERS *Dial-Up—Phone Line *Broadband Cable—TV Cable DSL—Phone Line Satellite—Satellite Dish Wireless—Radio Waves

10. Considerations: Cost Speed Reliability Extras provided Tech. Support Other costs & fees

11. Dial-UpCableDSLSatelliteWireless $7-$15$40-$50$35-$50Up to $100$25-$50 People PC Net Zero Cox Time Warner Verizon AT&T Hughes Net Skywayusa EagleCom 56 kbps512kb-20 mbps125kb-8 mbpsup to 6 mbpsup to 30 mbps Affected by number of users Affected by distance from hub Affected by weather Installation charge? Cost of satellite? Installation? Installation charge?

12. WHAT YOU NEED TO GET ON THE INTERNET: HARDWARE (perhaps including a modem) A WEB BROWSER ---Examples: Internet Explorer & Firefox ---Function: Helps you access pages on the WWW & sets specifications on how those pages appear. AN INTERNET SERVICE PROVIDER

13. WEB BROWSERS Internet Explorer Mozilla Firefox

14. SOME BROWSER BUTTONS Internet Explorer Mozilla Firefox Refresh Favorites/Bookmarks Back Stop Forward

15. Internet Use as Risen Steadily Since 1997 Now in U.S. approximately 75%

16. COMMON INTERNET USES Social Networks—Facebook, Twitter, etc. E-Mail On-Line Games Classifieds/Auctions Information Search Videos/Movies—YouTube, Netflix, etc.

17. E-MAIL ETIQUETTE 1.Be sure to include a Subject Line. 2.Use BCC to avoid giving out others’ e-mail addresses. 3.Keep messages short & focused. 4.Don’t use ALL CAPS! 5.Use discretion in your content. 6.Use a smiley to avoid being misunderstood. 7.Include your name at the bottom.

18. SEARCH ENGINES Used to locate information on the Internet. May have different sections, such as Images & News.

19. SEARCH ENGINES Advanced Search options let you look for a specific type of file, a date, a certain language, a particular domain type (.com,.edu), etc.

20. SEARCH ENGINES Common Search Engines: Google Bing Yahoo

21. SECURITY THREATS Virus--A program that attaches itself to a program or file spreading infection when it is sent on. Usually attached to an.exe file & can only spread when a human send it on or opens it. Worm--A program that spreads from computer to computer causing problems with your computer. It has the capability to travel without any human action. Because it can copy itself it may eventually take up all your computer memory & cause it to stop operating.

22. SECURITY THREATS Spyware--A program that originally seems like legitimate software but will do damage when installed on your computer. Can cause serious damage by destroying or deleting files & information. Phishing—A e-mail that appears to be legitimate from a known company or bank. They ask you to enter personal information and then use it to steal your identity or financial resources.

23. TIPS TO STAY SAFE 1. Deal with sites that use encryption. This keeps your information safe by sending it in a coded form. 2.Use anti-virus and anti-spyware software. 3.Be sure your computer has a firewall set. 4.Deal only with companies you know and never give out personal or financial information by e-mail. 5.Only open e-mails from addresses that you know. Be especially careful of.exe files attached to e-mails.

24. INTERNET BASICS Happy Computing!