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Chapter 2 The Internet & World Wide Web
- 1. Discovering Computers 2009 Chapter 2 The Internet and World Wide Web
- 2. Chapter 2 Objectives Discuss the history of the Internet Describe the types of Web sites Recognize how Web pages Explain how to access and use graphics, animation, audio, connect to the Internet video, virtual reality, and plug-ins Analyze an IP address Identify the steps required for Web publishing Describe the types of e-commerce Identify the components of a Web address Explain how e-mail, mailing lists, instant messaging, chat rooms, VoIP, FTP, and newsgroups Explain the purpose of a Web browser and message boards work Search for information on the Web Identify the rules of netiquette Next
- 3. The Internet What are some services found on the Internet? p. 68-69 Fig. 2-1 Next
- 4. History of theInternet How did the Internet originate? ARPANET Networking project by Pentagon’s Advanced Research Projects Goal: Agency (ARPA) Goal: To allow scientists To function if at different part of network locations to share were disabled information Became functional September 1969 p. 69 Next
- 5. History of theInternet How has the Internet grown? Today More than 500 million host nodes 1984 More than 1,000 host nodes 1969 Four host nodes p. 69 Next
- 6. History of theInternet Who controls the Internet? No one — it is a public, cooperative, and c c independent network Several organizations set standards 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 Link from left navigation, then click W3C below Chapter 2 p. 70 Next
- 7. How the InternetWorks How can you connect to the Internet? Slow-speed High-speed technology connection Dial-up access DSL, cable modem, modem in your FTTP, fixed wireless, wireless modem, computer uses a Wi-Fi, and satellite modems standard telephone line to connect to the Internet Connection is always on— Connection must be established whenever the computer each time you log on. is running p. 70 Next
- 8. How the InternetWorks What are ways to access the Internet? 1. ISP, Regional or National 2. OSP (AOL and MSN, for example) 3. Wireless Internet Service Provider Click to view Web Link, click Chapter 2, Click Web Link from left navigation, then click Modems below Chapter 2 p. 71 – 72 Fig. 2-2 Next
- 9. How the InternetWorks How might data travel the Internet using a cable modem connection? p. 73 Fig. 2-3 Next
- 10. How the InternetWorks What is a domain name? Text version of Internet protocol (IP) address Number that uniquely identifies each computer or device connected to Internet p. 73 - 74 Figs. 2-4 – 2-5 Next
- 11. The World WideWeb What is the World Wide Web (WWW)? 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 p. 75 Next
- 12. The World WideWeb What is a Web browser? Program that allows you to view Web pages Internet Firefox Netscape Explorer Opera Safari p. 75 Next
- 13. The World WideWeb How does a Web browser display a home page? Step 2. Web browser looks up the home page setting Step 3. The Web browser communicates with the Step 1. access provider’s Click the Web browser server to retrieve the program name IP address. The IP Step 4. address is sent to your computer. The home page displays in the Web browser p. 75 Fig. 2-6 Next
- 14. The World WideWeb What is a home page? The first page that a Web site displays Often provides connections to other Web pages p. 75 - 76 Fig.2-6 Next
- 15. The World WideWeb How do Internet-enabled mobile devices access the Web? Use a microbrowser that displays Web pages that contain mostly text p. 76 Fig. 2-7 Next
- 16. The World WideWeb What is downloading? The process of a computer receiving information Depending upon connection speed, downloading can take from a few seconds to several minutes p. 76 Next
- 17. The World WideWeb What is a URL? Unique address for a Web page A web server delivers the Web page to your computer p. 76 - 77 Fig. 2-8 Next
- 18. The World WideWeb What is a hyperlink (link)? Built-in connection to another related Web page location Item found elsewhere on same Web page Different Web page at same Web site Web page at a different Web site p. 76 - 78 Next
- 19. The World WideWeb How can you recognize links? Pointer changes to a small hand when you point to a link A link can be text or an image Text links are usually underlined and in a different color p. 77 Fig. 2-9 Next
- 20. The World WideWeb 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 Next
- 21. The World WideWeb What is a subject directory? Search tool with organized set of categories and subcategories Lets you find information by clicking links rather than entering keywords p. 78 – 80 Next
- 22. The World WideWeb What is a hit? Any Web site name that is listed as the result of a search p. 80 Fig. 2-11 Next
- 23. The World WideWeb What are the twelve basic types of Web sites? Business/ Portal News Informational Educational Entertainment Marketing Social Content Advocacy Blog Wiki Personal Network Aggregator p. 82 – 84 Next
- 24. The World WideWeb What is a portal? A Web site that offers a variety of services from one, convenient location, usually for free Searching, news, sports and weather, Web publishing, reference tools, stock quotes, maps, shopping, e-mail, and online communities (Web sites that join people with similar interests) p. 82 – 83 Fig. 2-14a Next
- 25. The World WideWeb What is a news Web site? Contains newsworthy material Stories and articles relating to current events, life, money, sports, and the weather p. 82 - 83 Fig. 2-14b Next
- 26. The World WideWeb What is an informational Web site? Contains factual information Created by organizations and government agencies p. 82 – 83 Fig. 2-14c Next
- 27. The World WideWeb What is a business/marketing Web site? Contains content that promotes products or services Allows you to purchase products or services online p. 82 – 83 Fig. 2-14d Next
- 28. The World WideWeb What is an educational Web site? Offers avenues for formal and informal teaching and learning Learn how airplanes fly or how to cook a meal Some colleges offer online classes and degrees p. 82 - 83 Fig. 2-14e Next
- 29. The World WideWeb What is an entertainment Web site? Offers an interactive and engaging environment featuring music, videos, sports, games, ongoing Web episodes, sweepstakes, chats, and more p. 82 - 83 Fig. 2-14f Next
- 30. The World WideWeb What is an advocacy Web site? Contains content that describes a cause, opinion, or idea p. 82 - 83 Fig. 2-14g Next
- 31. The World WideWeb What is a blog? Short for Weblog Uses a regularly updated journal format to reflect the interests, opinions, and personalities of the author and sometimes site visitors Video blog (vlog), blogosphere, and vlogosphere p. 82 - 83 Fig. 2-14h Next
- 32. The World WideWeb What is a wiki? Collaborative Web site that allows users to create, add to, modify, or delete the Web site content via their Web browser p. 82-84 Fig. 2-14i Next
- 33. The World WideWeb What is an online social network? Encourages members to share their interests, ideas, stories, photos, music, and videos Media sharing Web site Click to view Web Link, click Chapter 2, Click Web Link from left navigation, then click Facebook below Chapter 2 p. 83 - 84 Fig. 2-14j Next
- 34. The World WideWeb What is a content aggregator? Business that gathers and organizes Web content and then distributes, or feeds, the content to subscribers for free or a fee p. 83 - 84 Fig. 2-14k Next
- 35. The World WideWeb What is a personal Web site? Web page maintained by private individual or family Reasons: sharing life experience with the world or job hunting p. 83 - 84 Fig. 2-14l Next
- 36. The World WideWeb What are the guidelines for evaluating the value of a Web site? Affiliation Audience Authority Content Currency Design Objectivity p. 84 Fig. 2-15 Next
- 37. The World WideWeb What is multimedia? Application combining text with other media elements Graphics Animation Audio Video Virtual reality Plug-ins p. 85, 89 Fig. 2-16 Next
- 38. The World WideWeb What graphics formats are used on the Web? BMP GIF JPEG (pronounced JIFF) (pronounced JAY-peg) PNG TIFF (pronounced ping) p. 85 Fig. 2-17 Next
- 39. The World WideWeb What is a thumbnail? Small version of a larger graphic —used to c improve Web page display time Usually click on thumbnail to display larger graphic p. 86 Fig. 2-18 Next
- 40. The World WideWeb What is animation? Appearance of motion created by displaying a series of still images in sequence p. 86 Next
- 41. The World WideWeb What is audio? Music, speech, or any other sound Individual compressed sound files that you download from the Web to your computer Common Web audio file formats are AAC, AIFF, ASF, MP3, WAV, WMA, RA, and QT Once downloaded, you can play (listen to) the contents of the files A podcast is recorded audio, usually an MP3 file, stored on a Web site that can be downloaded to a computer or a portable media player p. 86 - 87 Fig. 2-20 Next
- 42. The World WideWeb What is streaming audio? The process of Enables you to transferring audio listen to music in a continuous as it downloads and even flow to your computer p. 86 Next
- 43. The World WideWeb What is video? Consists of full-motion images, most with sound, that are played back at various speeds MPEG (Moving Pictures Experts Group) is popular video compression standard Click to view Web Link, click Chapter 2, Click Web Link from left navigation, then click YouTube below Chapter 2 p. 88 Fig. 2-21 Next
- 44. The World WideWeb Video: Tell Your Stores via Vlog CLICK TO START Next
- 45. The World WideWeb What is virtual reality (VR)? Use of computers to simulate real or imagined environment Appears as a three dimensional (3-D) space Used for games and many practical applications p. 88 – 89 Fig. 2-22 Next
- 46. The World WideWeb What are plug-ins? Programs that extend the capability of a browser You can download many plug-ins at no cost from various Web sites p. 89 Fig. 2-23 Next
- 47. The World WideWeb What is Web publishing? Development and maintenance of Web pages p. 89 - 90 Fig. 2-24 Next
- 48. E-Commerce What is e-commerce? Short for electronic commerce Business transaction that occurs over the Internet Business to consumer (B2C) Sale of goods to general public Consumer to consumer (C2C) One consumer sells directly to another Business to business (B2B) Business providing goods and Click to view Web Link, services to other businesses click Chapter 2, Click Web Link from left navigation, then click PayPal below Chapter 2 p. 91 - 92 Fig. 2-25 Next
- 49. Other Internet Services What is e-mail? Short for electronic mail The transmission of messages and files via a computer network Messages can consist of simple text or can contain attachments, such as documents, graphics, or audio/video clips Internet access providers usually provide an e-mail program Some Web sites—such as Google Gmail, Windows Live Hotmail, and Yahoo! Mail—provide free e-mail services One of the original services on the Internet Click to view Web Link, click Chapter 2, Click Web Link from left navigation, then click E-Mail below Chapter 2 p. 92 - 94 Next
- 50. Other Internet Services How do you send an e-mail message? p. 93 Fig. 2-26 Next
- 51. Other Internet Services What is an e-mail address? Unique name that consists of a user name and domain name that identifies the user p. 94 Fig. 2-27 Next
- 52. Other Internet Services How does an e-mail message travel? Step 1. Using e-mail software, you create and send message Step 2. Your software contacts software Step 4. on your service When recipient uses provider’s e-mail software to check outgoing mail for e-mail messages, the server message transfers from incoming mail server to recipient’s computer Step 3. Software on outgoing mail server determines best route for data and sends message, which travels along Internet p. 95 Fig. 2-28 Next routers to recipient’s incoming mail server
- 53. Other Internet Services What is a mailing list? Group of e-mail names and addresses given a single name When a message is sent to the mailing list, everyone on the list receives the message To add your name to a mailing list you must subscribe to it; to remove your name you must unsubscribe Click to view Web Link, click Chapter 2, Click Web Link from left navigation, then click Mailing Lists below Chapter 2 p. 96 Fig. 2-29 Next
- 54. Other Internet Services What is instant messaging (IM)? A real-time Internet communications service that notifies you when one or more people are online and allows you to exchange messages or files p. 96 - 97 Fig. 2-30 Next
- 55. Other Internet Services What is a chat? Real-time typed conversation that takes place on a computer Chat room is location on server that permits users to discuss topics of interest Click to view Web Link, click Chapter 2, Click Web Link from left navigation, then click Chat Rooms below Chapter 2 p. 97 - 98 Fig. 2-31 Next
- 56. Other Internet Services What is VoIP (Voice over IP)? Enables users to speak to other users over the Internet p. 98 - 99 Fig. 2-32 Next
- 57. Other Internet Services What is FTP? File Transfer Protocol—Internet standard that allows you to upload and download files with other computers on the Internet Click to view Web Link, click Chapter 2, Click Web Link from left navigation, then click FTP below Chapter 2 p. 98 – 99 Fig. 2-33 Next
- 58. Other Internet Services What are newsgroups and message boards? Newsgroup Online area where users discuss a particular subject Message board Type of discussion group Many Web sites use message boards because they are easier to use p. 100 Fig. 2-34 Next
- 59. Netiquette Whatis 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 Fig. 2-35 Next
- 60. Summary of theInternet and World Wide Web History and structure of the Internet Electronic commerce The World Wide Web Other Internet services Web Publishing Netiquette Chapter 2 Complete