Discovering Computers_Ch02

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Discovering Computers_Ch02

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  1. Objectives Overview

    Slide 2 - Objectives Overview

    • Discovering Computers: Chapter 2
    • 2
    • See Page 54
    • for Detailed Objectives
    • Discuss the evolution of the Internet
    • Briefly describe various broadband Internet connections
    • Describe the purpose of an IP address and its relationship to a domain name
    • Describe features of browsers and identify the components of a web address
    • Describe ways to enter effective search text
    • Explain benefits and risks of using social networking sites
  2. Objectives Overview

    Slide 3 - Objectives Overview

    • Discovering Computers: Chapter 2
    • 3
    • See Page 54
    • for Detailed Objectives
    • Describe uses of various types of websites
    • Identify and briefly describe the steps required for web publishing
    • Explain how the web uses graphics, animation, audio, video, and virtual reality
    • Explain how email, email lists, instant messaging, chat rooms, discussion forums, VoIP, and FTP work
    • Identify the rules of netiquette
  3. The Internet

    Slide 4 - The Internet

    • The Internet is a worldwide collection of networks that links millions of businesses, government agencies, educational institutions, and individuals
    • Discovering Computers: Chapter 2
    • 4
    • Pages 54 - 55
    • Figure 2-1
  4. Evolution of the Internet

    Slide 5 - Evolution of the Internet

    • The Internet originated as ARPANET in September 1969 and had two main goals:
    • Discovering Computers: Chapter 2
    • 5
    • Page 54
    • Allow scientists at different physical locations to share information and work together
    • Function even if part of the network were disabled or destroyed by a disaster
  5. Evolution of the Internet

    Slide 6 - Evolution of the Internet

    • Discovering Computers: Chapter 2
    • 6
    • Page 54
    • 1969
    • ARPANET becomes functional
    • 1984
    • ARPANET has more than 1,000 individual computers linked as hosts
    • Today
    • Millions of hosts connect to the Internet
  6. Quiz Time

    Slide 7 - Quiz Time

    • 7
    • Discovering Computers: Chapter 2
  7. Connecting to the Internet

    Slide 8 - Connecting to the Internet

    • With wired connections, a computer or device physically attaches via a cable or wire to a communications device
    • Computers without a communications device can use a wireless modem
    • 8
    • Page 56
    • Discovering Computers: Chapter 2
  8. Connecting to the Internet

    Slide 9 - Connecting to the Internet

    • 9
    • Page 56
    • Figure 2-2
    • Discovering Computers: Chapter 2
  9. Connecting to the Internet

    Slide 10 - Connecting to the Internet

    • 10
    • Page 57
    • Discovering Computers: Chapter 2
    • Wired
    • Wireless
    • Cable Internet service
    • DSL (digital subscriber line)
    • Fiber to the Premises (FTTP)
    • Wi-Fi (wireless fidelity)
    • Mobile broadband
    • Fixed wireless
    • Satellite Internet Service
  10. Connecting to the Internet

    Slide 11 - Connecting to the Internet

    • A cybercafé is a location that provides computers with Internet access, usually for a fee
    • A hot spot is a wireless network that provides Internet connections to mobile computers and devices
    • 11
    • Page 57
    • Figure 2-3
    • Discovering Computers: Chapter 2
  11. Connecting to the Internet

    Slide 12 - Connecting to the Internet

    • Discovering Computers: Chapter 2
    • 12
    • Page 58
    • An Internet service provider (ISP) is a business that provides individuals and organizations access to the Internet free or for a fee
    • Bandwidth represents the amount of data that travels over a network
    • Megabyte (MB)
    • Gigabyte (GB)
  12. Quiz Time

    Slide 13 - Quiz Time

    • 13
    • Discovering Computers: Chapter 2
  13. Connecting to the Internet

    Slide 14 - Connecting to the Internet

    • Discovering Computers: Chapter 2
    • 14
    • Page 59
    • Figure 2-4
  14. Connecting to the Internet

    Slide 15 - Connecting to the Internet

    • An IP address is a sequence of numbers that uniquely identifies each computer or device connected to the Internet
    • A domain name is a text-based name that corresponds to the IP address
    • A DNS server translates the domain name into its associated IP address
    • Discovering Computers: Chapter 2
    • 15
    • Pages 60 - 61
    • Figure 2-5
  15. Connecting to the Internet

    Slide 16 - Connecting to the Internet

    • Discovering Computers: Chapter 2
    • 16
    • Page 60
    • Table 2-3
  16. Connecting to the Internet

    Slide 17 - Connecting to the Internet

    • Discovering Computers: Chapter 2
    • 17
    • Page 61
    • Figure 2-6
  17. Quiz Time

    Slide 18 - Quiz Time

    • 18
    • Discovering Computers: Chapter 2
  18. The World Wide Web

    Slide 19 - The World Wide Web

    • The World Wide Web (WWW), or web, consists of a worldwide collection of electronic documents (webpages)
    • A website is a collection of related webpages and associated items
    • A web server is a computer that delivers requested webpages to your computer
    • Web 2.0 refers to websites that provide a means for users to share personal information, allow users to modify website content, and provide applications through a browser
    • Discovering Computers: Chapter 2
    • 19
    • Pages 61 - 62
  19. The World Wide Web

    Slide 20 - The World Wide Web

    • A browser is an application that enables users with an Internet connection to access and view webpages on a computer or mobile device
    • A home page is the first page that a website displays
    • Desktop browsers typically support tabbed browsing
    • Discovering Computers: Chapter 2
    • 20
    • Pages 62 - 63
    • Figure 2-7
  20. The World Wide Web

    Slide 21 - The World Wide Web

    • A webpage has a unique address called a web address or URL
    • Discovering Computers: Chapter 2
    • 21
    • Pages 64 - 65
    • Figure 2-8
  21. The World Wide Web

    Slide 22 - The World Wide Web

    • A web app is an application stored on a web server that you access through a browser
    • Web app hosts usually provide storage for users’ data and information on their servers, known as cloud storage
    • 22
    • Pages 65 – 66
    • Figure 2-10
    • Discovering Computers: Chapter 2
  22. Types of Websites

    Slide 23 - Types of Websites

    • A search engine is software that finds websites, webpages, images, videos, news, maps, and other information related to a specific topic
    • A subject directory classifies webpages in an organized set of categories, such as sports or shopping, and related subcategories
    • Discovering Computers: Chapter 2
    • 23
    • Pages 67 - 68
  23. Quiz Time

    Slide 24 - Quiz Time

    • 24
    • Discovering Computers: Chapter 2
  24. Types of Websites

    Slide 25 - Types of Websites

    • Search operators can help to refine your search
    • Discovering Computers: Chapter 2
    • 25
    • Page 68
    • Table 2-4
  25. The World Wide Web

    Slide 26 - The World Wide Web

    • There are thirteen types of Web sites
    • Discovering Computers: Chapter 2
    • 26
    • Pages 68 – 72
    • Online social network
    • Informational
    • Media sharing and bookmarking sites
    • News, weather, sports, and other mass media
    • Educational
    • Business, Governmental, and Organizational
  26. The World Wide Web

    Slide 27 - The World Wide Web

    • 27
    • Pages 72 – 75
    • Discovering Computers: Chapter 2
    • Blogs
    • Wikis
    • Health and Science
    • Entertainment
    • Financial
    • Travel and Mapping
  27. The World Wide Web

    Slide 28 - The World Wide Web

    • 28
    • Pages 75 – 78
    • Discovering Computers: Chapter 2
    • Shopping and Auctions
    • Careers and Employment
    • E-Commerce
    • Portals
  28. The World Wide Web

    Slide 29 - The World Wide Web

    • Web publishing is the development and maintenance of websites
    • 29
    • Pages 78 - 79
    • Discovering Computers: Chapter 2
    • Plan the website
    • Design the website
    • Create the website
    • Host the website
    • Maintain the website
  29. Quiz Time

    Slide 30 - Quiz Time

    • 30
    • Discovering Computers: Chapter 2
  30. Media on the Web

    Slide 31 - Media on the Web

    • Multimedia refers to any application that combines text with:
    • Discovering Computers: Chapter 2
    • 31
    • Page 79
    • Graphics
    • Animation
    • Audio
    • Video
    • Virtual Reality
  31. Media on the Web

    Slide 32 - Media on the Web

    • A graphic is a digital representation of nontext information
    • Graphic formats include BMP, GIF, JPEG, PNG, and TIFF
    • Discovering Computers: Chapter 2
    • 32
    • Pages 80 – 81
    • Figure 2-21
  32. Media on the Web

    Slide 33 - Media on the Web

    • An infographic is a visual representation of data and information, designed to communicate quickly, simplify complex concepts, or present patterns or trends
    • Discovering Computers: Chapter 2
    • 33
    • Pages 80 – 81
    • Figure 2-22
  33. Media on the Web

    Slide 34 - Media on the Web

    • Animation is the appearance of motion created by displaying a series of still images in sequence
    • Discovering Computers: Chapter 2
    • 34
    • Page 81
    • Animation is the appearance of motion created by displaying a series of still images in sequence
  34. Quiz Time

    Slide 35 - Quiz Time

    • 35
    • Discovering Computers: Chapter 2
  35. Media on the Web

    Slide 36 - Media on the Web

    • Audio includes music, speech, or any other sound
    • Compressed to reduce file size
    • You listen to audio on your computer using a media player
    • Discovering Computers: Chapter 2
    • 36
    • Page 82
    • Figure 2-23
  36. Media on the Web

    Slide 37 - Media on the Web

    • Video consists of images displayed in motion
    • Virtual reality (VR) is the use of computers to simulate a real or imagined environment that appears as a three-dimensional space
    • Discovering Computers: Chapter 2
    • 37
    • Page 83
    • Figure 2-24
  37. Media on the Web

    Slide 38 - Media on the Web

    • Discovering Computers: Chapter 2
    • 38
    • Page 83
    • A plug-in is a program that extends the capability of a Web browser
  38. Other Internet Services

    Slide 39 - Other Internet Services

    • Email is the transmission of messages and files via a computer network
    • An email program allows you to create, send, receive, forward, store, print, and delete email messages
    • Discovering Computers: Chapter 2
    • 39
    • Page 84
  39. Other Internet Services

    Slide 40 - Other Internet Services

    • Discovering Computers: Chapter 2
    • 40
    • Page 85
    • Figure 2-25
  40. Quiz Time

    Slide 41 - Quiz Time

    • 41
    • Discovering Computers: Chapter 2
  41. Other Internet Services

    Slide 42 - Other Internet Services

    • An email list is a group of email addresses used for mass distribution of a message
    • Discovering Computers: Chapter 2
    • 42
    • Page 86
    • Figure 2-26
  42. Other Internet Services

    Slide 43 - Other Internet Services

    • Instant messaging (IM) is a real-time Internet communications service
    • Discovering Computers: Chapter 2
    • 43
    • Page 86
    • Figure 2-27
    • Instant messaging (IM) is a real-time Internet communications service
  43. Other Internet Services

    Slide 44 - Other Internet Services

    • A chat is a real-time typed conversation that takes place on a computer or mobile device
    • A chat room is a website or application that permits users to chat with others who are online at the same time
    • Discovering Computers: Chapter 2
    • 44
    • Page 87
    • Figure 2-30
  44. Other Internet Services

    Slide 45 - Other Internet Services

    • A discussion forum is an online area in which users have written discussions about a particular subject
    • 45
    • Page 87
    • Figure 2-29
    • Discovering Computers: Chapter 2
  45. Other Internet Services

    Slide 46 - Other Internet Services

    • VoIP (Voice over IP) enables users to speak to other users over the Internet
    • Discovering Computers: Chapter 2
    • 46
    • Page 88
    • Figure 2-31
  46. Quiz Time

    Slide 47 - Quiz Time

    • Discovering Computers: Chapter 2
    • 47
  47. Other Internet Services

    Slide 48 - Other Internet Services

    • FTP (File Transfer Protocol) is an Internet standard that permits file uploading and downloading to and from 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 FTP
    • Discovering Computers: Chapter 2
    • 48
    • Page 88
  48. Netiquette

    Slide 49 - Netiquette

    • Netiquette is the code of acceptable Internet behavior
    • Discovering Computers: Chapter 2
    • 49
    • Page 90
    • Figure 2-30
  49. Summary

    Slide 50 - Summary

    • Discovering Computers: Chapter 2
    • 50
    • Page 91
    • Evolution of the Internet
    • The Web
    • Various types of websites
    • Other services available on the Internet
    • Netiquette
  50. Chapter 2 Complete

    Slide 51 - Chapter 2 Complete