Chapter 02

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Fundamentals of the World Wide Web and Internet : "Discovering Computers 2012"

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Chapter 02

  1. 1. Chapter 2Fundamentals of the World Wide Weband InternetDiscovering Computers 2012 Your Interactive Guide to the Digital World
  2. 2. Objectives Overview Identify and briefly describe various broadband Internet Discuss the evolution of the connections and state Describe the types of Internet Internet differences between broadband access providers Internet connections and dial- up connections Describe how to use a search Describe the purpose of an IP Explain the purpose of a Web engine to search foraddress and its relationship to a browser and identify the information on the Web and domain name components of a Web address differentiate between a search engine and a subject directorySee Page 73 2for Detailed Objectives Discovering Computers 2012: Chapter 2
  3. 3. Objectives Overview Explain how Web pages use Identify and briefly describe the steps Describe the types of Web sites graphics, animation, audio, video, virtual required for Web publishing reality, and plug-ins Explain how e-mail, mailing lists, instant Describe the types of e-commerce messaging, chat rooms, VoIP, newsgroups Identify the rules of netiquette and message boards, and FTP workSee Page 73 3for Detailed Objectives Discovering Computers 2012: Chapter 2
  4. 4. The Internet• The Internet is a worldwide collection of networks that links millions of businesses, government agencies, educational institutions, and individualsPage 74 4 Discovering Computers 2012: Chapter 2Figure 2-1
  5. 5. Evolution of the Internet• The Internet originated as ARPANET in September 1969 and had two main goals: Allow scientists at Function even if part of different physical the network were locations to share disabled or destroyed information and work by a disaster togetherPage 75 5 Discovering Computers 2012: Chapter 2
  6. 6. Evolution of the Internet 1986 NSF connects NSFnet to 1969 ARPANET and ARPANET becomes 1996 becomes known as the Internet2 is functional Internet founded 1984 1995 NSFNet Today More ARPANET has terminates than 550 more than its network million hosts 1,000 on the connect to individual Internet and the Internet computers resumes linked as status as hosts research networkPages 75 - 76 6 Discovering Computers 2012: Chapter 2
  7. 7. Evolution of the Internet• Each organization is responsible only for maintaining its own network – The World Wide Web Consortium (W3C) oversees research and sets guidelines and standards• Internet2 connects more than 200 universities and 115 companies via a high-speed private networkPage 76 7 Discovering Computers 2012: Chapter 2
  8. 8. Evolution of the Internet• Many home and small business users connect to the Internet via high-speed broadband Internet service Fiber to Cable Cellular Satellite the FixedInternet DSL Radio Wi-Fi Internet Premises wireless service Network Service (FTTP)Page 76 8 Discovering Computers 2012: Chapter 2
  9. 9. Evolution of the Internet• An access provider is a business that provides individuals and organizations access to the Internet free or for a feePage 77 9 Discovering Computers 2012: Chapter 2Figure 2-2
  10. 10. Evolution of the Internet ISP (Internet Online service Wireless Internet service provider) provider (OSP) service provider Regional ISPs Provides wireless provide Internet Has many members- Internet access to access to a specific only features computers and geographical area mobile devices National ISPs Popular OSPs include provide Internet AOL (America May require a access in cities and Online) and MSN wireless modem towns nationwide (Microsoft Network)Page 78 10 Discovering Computers 2012: Chapter 2
  11. 11. Evolution of the InternetPage 79 11 Discovering Computers 2012: Chapter 2Figure 2-3
  12. 12. Evolution of the Internet• An IP address is a number that uniquely identifies each computer or device connected to the Internet• A domain name is the text version of an IP address – Top-level domain (TLD)• A DNS server translates the domain name into its associated IP addressPages 79 – 80 12 Discovering Computers 2012: Chapter 2Figure 2-4
  13. 13. Evolution of the InternetPage 80 13 Discovering Computers 2012: Chapter 2Figure 2-5
  14. 14. The World Wide Web• The World Wide Web, or Web, consists of a worldwide collection of electronic documents (Web pages)• A Web site is a collection of related Web pages and associated items• A Web server is a computer that delivers requested Web pages to your computer• Web 2.0 refers to Web sites that provide a means for users to interactPages 80 - 81 14 Discovering Computers 2012: Chapter 2
  15. 15. The World Wide Web• A Web browser, or browser, allows users to access Web pages and Web 2.0 programs Internet Firefox Opera Explorer Google Safari ChromePage 81 15 Discovering Computers 2012: Chapter 2
  16. 16. The World Wide WebPage 81 16 Discovering Computers 2012: Chapter 2Figure 2-6
  17. 17. The World Wide Web • A home page is the first • Some Web pages are page that a Web site designed specifically for displays microbrowsers • Web pages provide links to other related Web pages – Surfing the Web • Downloading is the process of receiving informationPages 82 - 83 17Figure 2-7 Discovering Computers 2012: Chapter 2
  18. 18. The World Wide Web• A Web page has a unique address called a URL or Web addressPages 82 – 83 18 Discovering Computers 2012: Chapter 2Figure 2-8
  19. 19. The World Wide Web• Tabbed browsing allows you to open and view multiple Web pages in a single Web browser windowPage 84 19 Discovering Computers 2012: Chapter 2Figure 2-9
  20. 20. The World Wide Web• Two types of search tools are search engines and subject directories Search Subject engine directory Classifies Web Finds information pages in an related to a organized set of specific topic categoriesPage 85 20 Discovering Computers 2012: Chapter 2
  21. 21. The World Wide WebPage 85 21 Discovering Computers 2012: Chapter 2Figure 2-10
  22. 22. The World Wide Web• A search engine is helpful in locating items such as: Images Videos Audio Publications People or Maps Blogs BusinessesPage 85 22 Discovering Computers 2012: Chapter 2
  23. 23. The World Wide WebPage 86 23 Discovering Computers 2012: Chapter 2Figure 2-11
  24. 24. The World Wide Web• Some Web browsers contain an Instant Search box to eliminate the steps of displaying the search engine’s Web page prior to entering the search textPage 87 24 Discovering Computers 2012: Chapter 2Figure 2-12
  25. 25. The World Wide Web• Search operators can help to refine your searchPage 87 25 Discovering Computers 2012: Chapter 2Figure 2-13
  26. 26. The World Wide Web• There are thirteen types of Web sites Portal News Informational Business/Marketing Blog Wiki Online Social Educational NetworkPages 88 – 91 26 Discovering Computers 2012: Chapter 2Figure 2-15
  27. 27. The World Wide Web Entertainment Advocacy Web Application Content Personal AggregatorPages 91 – 92 27 Discovering Computers 2012: Chapter 2Figure 2-15
  28. 28. Video: Tell Your Stories via Vlog CLICK TO START 28 Discovering Computers 2012: Chapter 2
  29. 29. The World Wide Web • Information presented on the Web must be evaluated for accuracy • No one oversees the content of Web pagesPage 92 29Figure 2-16 Discovering Computers 2012: Chapter 2
  30. 30. The World Wide Web• Multimedia refers to any application that combines text with:Page 92 30 Discovering Computers 2012: Chapter 2
  31. 31. The World Wide Web • A graphic is a digital representation of nontext information • Graphic formats include BMP, GIF, JPEG, PNG, an d TIFFPage 93 31Figure 2-17 Discovering Computers 2012: Chapter 2
  32. 32. The World Wide Web • A thumbnail is a small version of a larger graphicPage 94 32Figure 2-19 Discovering Computers 2012: Chapter 2
  33. 33. The World Wide Web• Animation is the appearance of motion created by displaying a series of still images in sequencePage 94 33 Discovering Computers 2012: Chapter 2
  34. 34. The World Wide Web• Audio includes music, speech, or any other sound – Compressed to reduce file size• You listen to audio on your computer using a player• Streaming is the process of transferring data in a continuous and even flowPages 94 – 95 34 Discovering Computers 2012: Chapter 2Figure 2-20
  35. 35. The World Wide WebPage 95 35 Discovering Computers 2012: Chapter 2Figure 2-21
  36. 36. The World Wide Web• Video consists of images displayed in motionPage 96 36 Discovering Computers 2012: Chapter 2Figure 2-22
  37. 37. The World Wide Web• Virtual reality (VR) is the use of computers to simulate a real or imagined environment that appears as a three-dimensional spacePages 96 – 97 37 Discovering Computers 2012: Chapter 2Figure 2-23
  38. 38. The World Wide Web• A plug-in is a program that extends the capability of a Web browserPage 97 38 Discovering Computers 2012: Chapter 2Figure 2-24
  39. 39. The World Wide Web• Web publishing is the development and maintenance of Web pages Analyze Maintain Plan a and Create a Deploy a a Web Web site design a Web site Web site site Web sitePage 98 39 Discovering Computers 2012: Chapter 2
  40. 40. E-Commerce• E-commerce is a business transaction that occurs over an electronic network – M-commerce identifies e-commerce that takes place using mobile devicesPage 98 40 Discovering Computers 2012: Chapter 2
  41. 41. E-Commerce Business- to- consumer (B2C) E-commerce Business- Consumer- to- to- business consumer (B2B) (C2C)Pages 98 - 99 41 Discovering Computers 2012: Chapter 2
  42. 42. E-CommercePage 99 42 Discovering Computers 2012: Chapter 2Figure 2-25
  43. 43. Other Internet Services • E-mail is the transmission of messages and files via a computer network • An e-mail program allows you to create, send, receive, fo rward, store, print, and delete e-mail messagesPage 101 43Figure 2-26 Discovering Computers 2012: Chapter 2
  44. 44. Other Internet ServicesPage 102 44 Discovering Computers 2012: Chapter 2Figure 2-27
  45. 45. Other Internet Services• A mailing list is a group of e-mail names and addresses given a single name – Subscribing adds your e-mail name and address – Unsubscribing removes your namePage 103 45 Discovering Computers 2012: Chapter 2Figure 2-28
  46. 46. Other Internet Services• Instant messaging (IM) is a real-time Internet communications servicePage 104 46 Discovering Computers 2012: Chapter 2Figure 2-29
  47. 47. Other Internet Services • A chat is a real-time typed conversation that takes place on a computer • A chat room is a location on an Internet server that permits users to chat with each otherPage 105 47 Discovering Computers 2012: Chapter 2Figure 2-30
  48. 48. Other Internet Services • VoIP (Voice over IP) enables users to speak to other users over the Internet – Also called Internet telephonyPage 106 48 Discovering Computers 2012: Chapter 2Figure 2-31
  49. 49. Other Internet Services • A newsgroup is an online area in which users have written discussions about a particular subject – Typically requires a newsreader • A message board is a Web-based type of discussion groupPage 107 49 Discovering Computers 2012: Chapter 2Figure 2-32
  50. 50. Other Internet Services• FTP (File Transfer Protocol) is an Internet standard that permits file uploading and downloading with other computers on the Internet• Many operating systems include FTP capabilities• An FTP server is a computer that allows users to upload and/or download files using FTPPage 107 50 Discovering Computers 2012: Chapter 2
  51. 51. Netiquette• Netiquette is the code of acceptable Internet behaviorPage 108 51 Discovering Computers 2012: Chapter 2Figure 2-33
  52. 52. Summary Browsing, navigating, searching, Web History and structure of the Internet World Wide Web publishing, and e-commerce Other Internet services: e-mail, instant messaging, chat Rules of netiquette rooms, VoIP, newsgroups and message boards, and FTPPage 109 52 Discovering Computers 2012: Chapter 2
  53. 53. Chapter 2Fundamentals of the World Wide Weband InternetDiscovering Computers 2012 Your Interactive Guide to the Digital World Chapter 2 Complete

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