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The Internet and World Wide Web

The Internet and World Wide Web. Next. Discuss how the Internet works. Identify a URL. Describe the types of Web pages. Understand ways to access the Internet. Know how to search for information on the Web.

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The Internet and World Wide Web

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  1. The Internet andWorld Wide Web

  2. Next Discuss how the Internet works Identify a URL Describe the types of Web pages Understand ways to access the Internet Know how to search for information on the Web Explain how e-mail, FTP, newsgroups and message boards, mailing lists, chat rooms and instant messaging work p. 2.2

  3. What is a network? A collection of computers and devices connected together via communications devices and media Modems Cables Telephone lines Satellites The Internet Next p. 2.2

  4. What is the Internet? Also called the Net A worldwide collection of networks that links millions of businesses, government agencies, educational institutions, and individuals The Internet Next p. 2.2

  5. What are some of the services found on the Internet? The Internet instant messaging e-mail Web message board chat file transfer Next p. 2.3 Fig. 2-1

  6. What are three parts of an Internet connection? How the Internet Works Server • Computer that manages the resources on a network • Provides a centralized storage area for resources such as programs and data • Also called a host computer Backbone • Inner structure of the Internet • Communications lines that carry the heaviest amount of traffic Client • Computer that can access the contents of the storage area on the server Next Click to view Web Link then click Internet Backbone p. 2.6

  7. How might data travel the Internet using a telephone line connection? How the Internet Works Regional ISP Regional ISP Regional ISP Regional ISP Regional ISP Step 3 Step 3 Step 3 Step 3 Step 3 Step 3 Step 5 Step 5 Step 5 Step 5 Step 1 Step 1 Step 1 Step 1 Step 1 Step 1 Step 1 Step 1 Step 2 Step 2 Step 2 Step 2 Step 2 Step 2 Step 2 Step 4 Step 4 Step 4 Step 4 Step 4 National ISP National ISP National ISP National ISP Step 6 Step 6 Step 6 Local ISP Local ISP Internet backbone Internet backbone Internet backbone Step 8 Step 7 Step 7 Next National ISP National ISP National ISP 1: You initiate an action to request data from the Internet. 2: A modem converts the digital signals from the computer into analog signals, which are understood by telephone lines. 3: Data (request) travels through telephone lines to a local ISP. 4: Data may pass through one or more routers before reaching its final destination. 5: The regional ISP uses lines, leased from a telephone company, to send data to a national ISP. 6: The national ISP routes data across the country to another national ISP. 7: Data moves from a national ISP to a local ISP and then to a destination server. 8: The server retrieves the requested data and sends it back through the Internet backbone to your computer. p. 2.7 Fig. 2-3

  8. What is the World Wide Web (WWW)? Also known as the Web A worldwide collection of electronic documents Each document on the Web is called a Web page Can contain text, graphics, sound, and video Can contain built-in connections to other documents A Web site is a collection of related Web pages The World Wide Web Next p. 2.9

  9. What is a Web browser? Also called a browser The World Wide Web Next • Software program that allows you to access and view Web pages • Two popular browsers for personal computers • Netscape • Internet Explorer p. 2.9 Fig. 2-6

  10. How can you establish a connection and start the Web browser? The World Wide Web Step 1 Step 1 Step 1 Step 2 Step 2 Internet Explorer icon Next Step 3 1 Double-click an icon on the desktop, such as Internet Explorer, to start your browser. 2 If you are not connected to the Internet already, your computer attempts to establish a connection with a service provider. If necessary, click the Connect button. 3 Connection to the Internet occurs and a home page displays. Shown here is an AOL home page. Your home page may vary. p. 2.10 Fig. 2-7

  11. What is a home page? Starting page for a browser The World Wide Web Next • Provides information about the site’s purpose and content • Some Web sites also refer to their starting page as a home page • May be changed at any time p. 2.10

  12. What is downloading? The World Wide Web The process of receiving information, such as a Web page, onto your computer from a server on the Internet Can take from a few seconds to several minutes You can speed up the display of pages by turning off the graphics and displaying only text in most Web browsers Next p. 2.11

  13. What is a hyperlink? Also called a link Built-in connection to another related Web page or part of a Web page Allows you to obtain information in a nonlinear way The World Wide Web Next Click to viewanimation p. 2.12

  14. How can you identify a link? Link can be a word, phrase, or image Text links usually are underlined or in a color different from the rest of the document A graphical link may change its appearance when you point to it The World Wide Web Next • The shape of the pointer on the screen changes to a small hand with a pointing index finger when you position it on a link or point to the link • Click the link to activate it p. 2.12

  15. What is a Uniform Resource Locator (URL)? Unique address for a Web page Browser retrieves a Web page by using the URL Also called a Web address Type the URL into the address text box on the browser and press the Enter key to display a Web page The World Wide Web http://www.nationalgeographic.com/travel/index.html address text box Next p. 2.13 Fig. 2-10

  16. What are the parts of a URL? The World Wide Web protocol domain name path http://www.nationalgeographic.com/travel/index.html Next Click to view Web Link then click URLs p. 2.13 Fig. 2-10

  17. What is a Web server? A computer that delivers (serves) Web pages you request The same Web server can store multiple Web sites The World Wide Web http://www.nationalgeographic.com/travel/index.html Next p. 2.13 Fig. 2-10

  18. What is a search engine? A software program you can use to find Web sites, Web pages and Internet files The World Wide Web Spider A program that reads pages on Web sites in order to find Web pages that contain the search text Also called a crawler or bot Search text A word or phrase entered in the search engine’s text box Also called keywords Next Click to view video p. 2.14

  19. What is a hit? Any Web page name that lists as the result of a search The World Wide Web 363 hits hit Next p. 2.14 Fig. 2-11

  20. What are some widely used search engines? The World Wide Web Next p. 2.15 Fig. 2-12

  21. What are the six basic types of Web pages? The World Wide Web business/marketing Web page advocacy Web page informational Web page personal Web page news Web page portalWeb page Next p. 2.16

  22. What is an advocacy Web page? Contains content that describes a cause, opinion,or idea Purpose is to convince the reader of the validity of the cause, opinion, or idea The World Wide Web Next p. 2.16 Fig. 2-14a

  23. What is a business/marketing Web page? Contains content that promotes or sells products or services Often allows you to purchase products or services online The World Wide Web Next p. 2.16 Fig. 2-14b

  24. What is an informational Web page? Contains factual information Many U.S. government sites provide information The World Wide Web Next p. 2.16 Fig. 2-14c

  25. What is a news Web page? Contains newsworthy material Stories and articles relating to current events, life, money, sports, and the weather The World Wide Web Next p. 2.16 Fig. 2-14d

  26. What is a portal Web page Often called a portal Offers a variety of Internet services from a single, convenient location The World Wide Web Next p. 2.16 Fig. 2-14e

  27. What services are often found on a portal? The World Wide Web search engine e-mail sports and weather newsgroups or message boards local , national, and worldwide news instant messaging reference tools stock quotes maps free personal Web pages chat rooms shopping malls and auctions calendars Next p. 2.17

  28. What is a personal Web page? A Web page maintained by a private individual who normally is not associated with any organization Reasons: job hunting and sharing life experience with the world The World Wide Web Next p. 2.17 Fig. 2-14f

  29. What is e-mail? Electronic mail The transmission of messages and files via a computer network Use an e-mail program to work with messages Other Internet Services create forward send print receive store Next delete Click to view Web Link then click E-mail p. 2.31

  30. How do you send an e-mail message? Other Internet Services Step 1 Step 1 Step 1 Step 1 Step 1 Step 2 Step 2 Step 2 Step 2 Step 3 Step 3 Step 3 Step 4 Step 4 Next Step 5 1 Start an e-mail program and point to the New Mail Message button 2 Click the New Mail Message button to display the Message window 3 Enter the recipient’s e-mail address, the subject, and the message in the Message window 4 Click the Insert File button to attach a JPG file containing a picture to the message. Locate the file on your hard disk and click its name. An icon for the file displays. Click the Send button to send the message. 5 When Sally receives the e-mail message, she opens the JPG file to view the picture. p. 2.30 Fig. 2-26

  31. What is an Internet e-mail address? A combination of a user name and a domain name that identifies a user so he or she can receive Internet e-mail Other Internet Services user name or user-ID A unique combination of characters that identifies you domain name Identifies the mail server at Next p. 2.31 Fig. 2-27

  32. What is FTP? File Transfer Protocol Other Internet Services file download window Next • An Internet standard that allows you to upload and download files with other computers on the Internet p. 2.33 Fig. 2-29

  33. Summary of the Internet and World Wide Web Next • The Internet • History of the Internet • How the Internet works • The World Wide Web • Other Internet services

  34. Complete

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