Chapter02
- 1. Discovering Computers 2009 Chapter 2 The Internet and World Wide Web
- 2. Chapter 2 Objectives Discuss the history of the InternetDiscuss the history of the Internet Explain how to access and connect to the Internet Explain how to access and connect to the Internet Analyze an IP addressAnalyze an IP address Identify the components of a Web addressIdentify the components of a Web address Explain the purpose of a Web browserExplain the purpose of a Web browser Search for information on the WebSearch for information on the Web Describe the types of Web sitesDescribe the types of Web sites Recognize how Web pages use graphics, animation, audio, video, virtual reality, and plug-ins Recognize how Web pages use graphics, animation, audio, video, virtual reality, and plug-ins Identify the steps required for Web publishingIdentify the steps required for Web publishing Explain how e-mail, mailing lists, instant messaging, chat rooms, VoIP, FTP, and newsgroups and message boards work Explain how e-mail, mailing lists, instant messaging, chat rooms, VoIP, FTP, and newsgroups and message boards work Identify the rules of netiquetteIdentify the rules of netiquette Next Describe the types of e-commerce
- 3. The Internet What are some services found on the Internet? p. 68-69 Fig. 2-1 Next
- 4. History of the Internet How did the Internet originate? Nextp. 69 Goal: To function if part of network were disabled Became functional September 1969 ARPANET Networking project by Pentagon’s Advanced Research Projects Agency (ARPA)Goal: To allow scientists at different locations to share information
- 5. History of the Internet How has the Internet grown? p. 69 Today More than 500 million host nodes 1984 More than 1,000 host nodes 1969 Four host nodes Next
- 6. History of the Internet Who controls the Internet? p. 70 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 Next No onec—cit is a public, cooperative, and independent network Several organizations set standards Click to view Web Link, click Chapter 2, Click Web Link from left navigation, then click W3C below Chapter 2
- 7. High-speed connection High-speed connection Slow-speed technology Slow-speed technology How the Internet Works How can you connect to the Internet? p. 70 Next Dial-up access modem in your computer uses a standard telephone line to connect to the Internet Dial-up access modem in your computer uses a standard telephone line to connect to the Internet DSL, cable modem, FTTP, fixed wireless, wireless modem, Wi-Fi, and satellite modems DSL, cable modem, FTTP, fixed wireless, wireless modem, Wi-Fi, and satellite modems Connection is always on— whenever the computer is running Connection is always on— whenever the computer is running Connection must be established each time you log on. Connection must be established each time you log on.
- 8. How the Internet Works What are ways to access the Internet? p. 71 – 72 Fig. 2-2 Next 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
- 9. How the Internet Works How might data travel the Internet using a cable modem connection? p. 73 Fig. 2-3 Next
- 10. How the Internet Works What is a domain name? p. 73 - 74 Figs. 2-4 – 2-5 Next Text version of Internet protocol (IP) address Number that uniquely identifies each computer or device connected to Internet
- 11. The World Wide Web p. 75 Next What is the World Wide Web (WWW)? A worldwide collection of electronic documents Each electronic document is called a Web page Also called the Web Can contain text, graphics, audio, video, and built-in connections A Web site is a collection of related Web pages
- 12. The World Wide Web What is a Web browser? p. 75 Next Internet Explorer NetscapeFirefox Program that allows you to view Web pages Opera Safari
- 13. The World Wide Web How does a Web browser display a home page? p. 75 Fig. 2-6 Next Step 3. The Web browser communicates with the access provider’s server to retrieve the IP address. The IP address is sent to your computer. Step 2. Web browser looks up the home page setting Step 1. Click the Web browser program name Step 4. The home page displays in the Web browser
- 14. The World Wide Web What is a home page? p. 75 - 76 Fig.2-6 Next The first page that a Web site displays Often provides connections to other Web pages
- 15. The World Wide Web How do Internet-enabled mobile devices access the Web? p. 76 Fig. 2-7 Use a microbrowser that displays Web pages that contain mostly text Next
- 16. The World Wide Web What is downloading? p. 76 Next The process of a computer receiving information Depending upon connection speed, downloading can take from a few seconds to several minutes
- 17. The World Wide Web What is a URL? p. 76 - 77 Fig. 2-8 Next Unique address for a Web page A web server delivers the Web page to your computer
- 18. The World Wide Web What is a hyperlink (link)? p. 76 - 78 Next Item found elsewhere on same Web page Different Web page at same Web site Web page at a different Web site Built-in connection to another related Web page location
- 19. The World Wide Web How can you recognize links? p. 77 Fig. 2-9 Next A link can be text or an image Pointer changes to a small hand when you point to a link Text links are usually underlined and in a different color
- 20. The World Wide Web What is a search engine? p. 78 – 80 Fig. 2-10 Next Program used to find Web sites and Web pages by entering words or phrases called search text Also called a keyword
- 21. The World Wide Web What is a subject directory? p. 78 – 80 Next Search tool with organized set of categories and subcategories Lets you find information by clicking links rather than entering keywords
- 22. The World Wide Web What is a hit? p. 80 Fig. 2-11 Next Any Web site name that is listed as the result of a search
- 23. Advocacy Blog Wiki Social Network Content Aggregator Personal Portal The World Wide Web What are the twelve basic types of Web sites? p. 82 – 84 Next News Informational Business/ Marketing Educational Entertainment
- 24. The World Wide Web What is a portal? p. 82 – 83 Fig. 2-14a Next 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)
- 25. The World Wide Web What is a news Web site? p. 82 - 83 Fig. 2-14b Next Contains newsworthy material Stories and articles relating to current events, life, money, sports, and the weather
- 26. The World Wide Web What is an informational Web site? p. 82 – 83 Fig. 2-14c Next Contains factual information Created by organizations and government agencies
- 27. The World Wide Web What is a business/marketing Web site? p. 82 – 83 Fig. 2-14d Next Contains content that promotes products or services Allows you to purchase products or services online
- 28. The World Wide Web What is an educational Web site? p. 82 - 83 Fig. 2-14e Next Learn how airplanes fly or how to cook a meal Some colleges offer online classes and degrees Offers avenues for formal and informal teaching and learning
- 29. The World Wide Web What is an entertainment Web site? p. 82 - 83 Fig. 2-14f Next Offers an interactive and engaging environment featuring music, videos, sports, games, ongoing Web episodes, sweepstakes, chats, and more
- 30. The World Wide Web What is an advocacy Web site? p. 82 - 83 Fig. 2-14g Next Contains content that describes a cause, opinion, or idea
- 31. The World Wide Web What is a blog? p. 82 - 83 Fig. 2-14h Next 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
- 32. The World Wide Web What is a wiki? p. 82-84 Fig. 2-14i Next Collaborative Web site that allows users to create, add to, modify, or delete the Web site content via their Web browser
- 33. The World Wide Web What is an online social network? p. 83 - 84 Fig. 2-14j Next 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
- 34. The World Wide Web What is a content aggregator? p. 83 - 84 Fig. 2-14k Next Business that gathers and organizes Web content and then distributes, or feeds, the content to subscribers for free or a fee
- 35. The World Wide Web What is a personal Web site? p. 83 - 84 Fig. 2-14l Next Web page maintained by private individual or family Reasons: sharing life experience with the world or job hunting
- 36. The World Wide Web What are the guidelines for evaluating the value of a Web site? p. 84 Fig. 2-15 Next Affiliation Audience Authority Content Currency Design Objectivity
- 37. The World Wide Web What is multimedia? p. 85, 89 Fig. 2-16 Next Application combining text with other media elements Graphics Animation Audio Video Virtual reality Plug-ins
- 38. The World Wide Web What graphics formats are used on the Web? p. 85 Fig. 2-17 Next BMPBMP PNG (pronounced ping) PNG (pronounced ping) GIF (pronounced JIFF) GIF (pronounced JIFF) TIFFTIFF JPEG (pronounced JAY-peg) JPEG (pronounced JAY-peg)
- 39. The World Wide Web What is a thumbnail? p. 86 Fig. 2-18 Next Small version of a larger graphicc—used to improve Web page display time Usually click on thumbnail to display larger graphic
- 40. The World Wide Web What is animation? p. 86 Next Appearance of motion created by displaying a series of still images in sequence
- 41. The World Wide Web What is audio? p. 86 - 87 Fig. 2-20 Next 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
- 42. The World Wide Web What is streaming audio? p. 86 Next The process of transferring audio in a continuous and even flow Enables you to listen to music as it downloads to your computer
- 43. The World Wide Web What is video? p. 88 Fig. 2-21 Next 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
- 44. The World Wide Web Video: Tell Your Stores via Vlog Next CLICK TO START
- 45. The World Wide Web What is virtual reality (VR)? p. 88 – 89 Fig. 2-22 Next Use of computers to simulate real or imagined environment Appears as a three dimensional (3-D) space Used for games and many practical applications
- 46. The World Wide Web What are plug-ins? p. 89 Fig. 2-23 Next Programs that extend the capability of a browser You can download many plug-ins at no cost from various Web sites
- 47. The World Wide Web What is Web publishing? p. 89 - 90 Fig. 2-24 Next Development and maintenance of Web pages
- 48. Business to business (B2B) Business providing goods and services to other businesses Consumer to consumer (C2C) One consumer sells directly to another E-Commerce What is e-commerce? p. 91 - 92 Fig. 2-25 Next Business to consumer (B2C) Sale of goods to general public Short for electronic commerce Business transaction that occurs over the Internet Click to view Web Link, click Chapter 2, Click Web Link from left navigation, then click PayPal below Chapter 2
- 49. Other Internet Services What is e-mail? p. 92 - 94 Next 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
- 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? p. 94 Fig. 2-27 Next Unique name that consists of a user name and domain name that identifies the user
- 52. Other Internet Services How does an e-mail message travel? p. 95 Fig. 2-28 Next Step 4. When recipient uses e-mail software to check for e-mail messages, the message transfers from incoming mail server to recipient’s computer Step 2. Your software contacts software on your service provider’s outgoing mail server Step 3. Software on outgoing mail server determines best route for data and sends message, which travels along Internet routers to recipient’s incoming mail server Step 1. Using e-mail software, you create and send message
- 53. Other Internet Services What is a mailing list? p. 96 Fig. 2-29 Next 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
- 54. Other Internet Services What is instant messaging (IM)? p. 96 - 97 Fig. 2-30 Next A real-time Internet communications service that notifies you when one or more people are online and allows you to exchange messages or files
- 55. Other Internet Services What is a chat? p. 97 - 98 Fig. 2-31 Next 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
- 56. Other Internet Services What is VoIP (Voice over IP)? Enables users to speak to other users over the Internet Nextp. 98 - 99 Fig. 2-32
- 57. Other Internet Services What is FTP? p. 98 – 99 Fig. 2-33 Next 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
- 58. Other Internet Services What are newsgroups and message boards? p. 100 Fig. 2-34 Next Newsgroup Many Web sites use message boards because they are easier to use Online area where users discuss a particular subject Message board Type of discussion group
- 59. Netiquette What is netiquette? p. 100 Fig. 2-35 Next Golden Rule: Treat others as you would like them to treat you. Code of acceptable behaviors users should follow while on the Internet
- 60. Summary of the Internet and World Wide Web History and structure of the InternetHistory and structure of the Internet The World Wide WebThe World Wide Web Web PublishingWeb Publishing Electronic commerceElectronic commerce Other Internet servicesOther Internet services NetiquetteNetiquette Chapter 2 Complete