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The Internet and World Wide Web

The Internet and World Wide Web. Communications. What are computer communications ?. Process in which two or more computers or devices transfer data, instructions, and information. p. 460 Fig. 9-1. Networks. What is a network ?.

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The Internet and World Wide Web

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  1. The Internet and World Wide Web

  2. Communications What are computercommunications? • Process in which two or more computers or devices transfer data, instructions, and information p. 460 Fig. 9-1

  3. Networks What is a network? • Collection of computers and devices connected via communications devices and transmissionmedia p. 469 Fig. 9-9

  4. The Internet • What are some services found on the Internet? p. 68-69 Fig. 2-1

  5. The Internet • The Internet is a worldwide collection of networks that links millions of businesses, government agencies, educational institutions, and individuals

  6. History of the Internet ARPANET Networking project by Pentagon’s Advanced Research Projects Agency (ARPA) Goal:To allow scientists at different locations to share information Goal:To function if part of network were disabled Became functional September 1969 • How did the Internet originate? p. 69

  7. History of the Internet Today More than one billion host nodes 1984 More than 1,000 host nodes 1969 Four host nodes • How has the Internet grown? p. 69

  8. Internet Hosts

  9. History of the Internet World Wide Web Consortium (W3C) • Oversees research, sets standards and guidelines • Mission is to contribute to the growth of the Web • Nearly 400 organizations around the world are members of the W3C Click to view Web Link,click Chapter 2, Click Web Linkfrom left navigation, then click W3Cbelow Chapter 2 • Who controls the Internet? • No onec—cit is a public, cooperative, andindependent network • Several organizations set standards p. 70 t

  10. Uses of Computer Communications What are wireless Internet access points and cybercafés? • Wireless Internet access point allows wireless connection to Internet in public location • 3G network • Cybercaféis coffee house that provides computers with Internet access p. 464-465 Fig. 9-4

  11. How the Internet Works • What is a domain name? • Text version ofInternet protocol (IP) address • Number that uniquely identifies each computer or device connected to Internet p. 73 - 74 Figs. 2-4 – 2-5

  12. The World Wide Web A worldwide collection of electronic documents Also called the Web Each electronic document is called a Web page Can contain text, graphics, audio, video, and built-in connections A Web site is a collection of related Web pages What is the World Wide Web (WWW)? p. 75

  13. The World Wide Web MicrosoftInternetExplorer Netscape Firefox Opera Safari • What is a Web browser? • Program that allows you to view Web pages p. 75

  14. The World Wide Web • What is a search engine? • Program used to find Web sites and Web pages by entering words or phrases called search text • Also called a keyword p. 78 – 80 Fig. 2-10

  15. The World Wide Web • There are thirteen types of Web sites

  16. The World Wide Web

  17. The World Wide Web • What are the guidelines for evaluating the value of a Web site? Affiliation Audience Authority Content Currency Design Objectivity p. 84 Fig. 2-15 t

  18. Netiquette • What is netiquette? • Code of acceptable behaviors users should follow while on the Internet Golden Rule: Treat others as you would like them to treat you. p. 100

  19. First Web Page

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