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Objectives Overview

Objectives Overview

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Objectives Overview

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  1. Objectives Overview Discovering Computers: Chapter 2 See Page 54 for Detailed Objectives

  2. Objectives Overview Discovering Computers: Chapter 2 See Page 54 for Detailed Objectives

  3. 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 Pages 54 - 55 Figure 2-1

  4. Evolution of the Internet • The Internet originated as ARPANET in September 1969 and had two main goals: Discovering Computers: Chapter 2 Page 54

  5. Evolution of the Internet Discovering Computers: Chapter 2 Page 54

  6. 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 Discovering Computers: Chapter 2 Page 56

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

  8. Connecting to the Internet Discovering Computers: Chapter 2 Page 57

  9. Connecting to the Internet • A cybercaféis 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 Discovering Computers: Chapter 2 Page 57 Figure 2-3

  10. Connecting to the Internet • 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) Discovering Computers: Chapter 2 Page 58

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

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

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

  14. Connecting to the Internet Discovering Computers: Chapter 2 Page 61 Figure 2-6

  15. The World Wide Web • The World Wide Web (WWW), or web, consists of a worldwide collection of electronic documents (webpages) • A websiteis a collection of related webpages and associated items • A web serveris a computer that delivers requested webpages to your computer • Web 2.0refers 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 Pages 61 - 62

  16. The World Wide Web • A browseris 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 Pages 62 - 63 Figure 2-7

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

  18. 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 Discovering Computers: Chapter 2 Pages 65 – 66 Figure 2-10

  19. Types of Websites • A search engineis 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 Pages 67 - 68

  20. Types of Websites • Search operators can help to refine your search Discovering Computers: Chapter 2 Page 68 Table 2-4

  21. The World Wide Web • There are thirteen types of Web sites Discovering Computers: Chapter 2 Pages 68 – 72

  22. The World Wide Web Discovering Computers: Chapter 2 Pages 72 – 75

  23. The World Wide Web Discovering Computers: Chapter 2 Pages 75 – 78

  24. The World Wide Web • Web publishingis the development and maintenance of websites Discovering Computers: Chapter 2 Pages 78 - 79

  25. Media on the Web • Multimedia refers to any application that combines text with: Discovering Computers: Chapter 2 Page 79

  26. 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 Pages 80 – 81 Figure 2-21

  27. 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 Pages 80 – 81 Figure 2-22

  28. Media on the Web • Animation is the appearance of motion created by displaying a series of still images in sequence Discovering Computers: Chapter 2 Page 81

  29. 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 Page 82 Figure 2-23

  30. 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 Page 83 Figure 2-24

  31. Media on the Web Discovering Computers: Chapter 2 Page 83

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

  33. Other Internet Services Discovering Computers: Chapter 2 Page 85 Figure 2-25

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

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

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

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

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

  39. 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 Page 88

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

  41. Summary Discovering Computers: Chapter 2 Page 91

  42. Chapter 2 Complete