Internet and World Wide Web
40 likes28,323 views
The document discusses the evolution of the Internet from its origins as ARPANET in 1969 to the World Wide Web today. It describes how the Internet was developed to allow scientists to share information and work together. It outlines the key events that led to the Internet being opened up for commercial and public use in the 1990s. It also defines important Internet concepts like IP addresses, domain names, Internet service providers, and the purpose and components of the World Wide Web and web browsers.
Internet and World Wide Web
- 1. Discovering Computers 2011 Living in a Digital World
- 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 for address 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 directory See Page 73 Discovering Computers 2011: Living in a Digital World 2 for Detailed Objectives Chapter 2
- 3. Objectives Overview Explain how Web pages use Identify and briefly describe Describe the types of Web graphics, animation, audio, the steps required for Web sites video, virtual reality, and publishing plug-ins Explain how e-mail, mailing lists, instant messaging, Describe the types of e- Identify the rules of chat rooms, VoIP, commerce netiquette newsgroups and message boards, and FTP work See Page 73 Discovering Computers 2011: Living in a Digital World 3 for Detailed Objectives Chapter 2
- 4. The Internet • The Internet is a worldwide collection of networks that links millions of businesses, government agencies, educational institutions, and individuals Page 74 Discovering Computers 2011: Living in a Digital World 4 Figure 2-1 Chapter 2
- 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 together Page 75 Discovering Computers 2011: Living in a Digital World 5 Chapter 2
- 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 network Pages 75 - 76 Discovering Computers 2011: Living in a Digital World 6 Chapter 2
- 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 network Click to view Web Link, click Chapter 2, Click Web Link from left navigation, then click W3C below Chapter 2 Page 76 Discovering Computers 2011: Living in a Digital World 7 Chapter 2
- 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 Fixed Internet DSL Radio Wi-Fi Internet Premises wireless service Network Service (FTTP) Page 76 Discovering Computers 2011: Living in a Digital World 8 Chapter 2
- 9. Evolution of the Internet • An access provider is a business that provides individuals and organizations access to the Internet free or for a fee Page 77 Discovering Computers 2011: Living in a Digital World 9 Figure 2-2 Chapter 2
- 10. Evolution of the Internet Wireless Internet ISP (Internet service Online service service provider provider) provider (OSP) (WISP) Regional ISPs provide Provides wireless Internet access to a Has many members- Internet access to specific geographical only features computers and area mobile devices National ISPs provide Popular OSPs include Internet access in AOL (America Online) May require a cities and towns and MSN (Microsoft wireless modem nationwide Network) Click to view Web Link, click Chapter 2, Click Web Link from left navigation, then click Wireless Modems below Chapter 2 Page 78 Discovering Computers 2011: Living in a Digital World 10 Chapter 2
- 11. Evolution of the Internet Page 79 Discovering Computers 2011: Living in a Digital World 11 Figure 2-3 Chapter 2
- 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 address Pages 79 – 80 Discovering Computers 2011: Living in a Digital World 12 Figure 2-4 Chapter 2
- 13. Evolution of the Internet Page 80 Discovering Computers 2011: Living in a Digital World 13 Figure 2-5 Chapter 2
- 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 interact Pages 80 - 81 Discovering Computers 2011: Living in a Digital World 14 Chapter 2
- 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 Chrome Page 81 Discovering Computers 2011: Living in a Digital World 15 Chapter 2
- 16. The World Wide Web Page 81 Discovering Computers 2011: Living in a Digital World 16 Figure 2-6 Chapter 2
- 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 information Click to view Web Link, click Chapter 2, Click Web Link from left navigation, then click iPhone below Chapter 2 Pages 82 - 83 Discovering Computers 2011: Living in a Digital World 17 Figure 2-7 Chapter 2
- 18. The World Wide Web • A Web page has a unique address called a URL or Web address Pages 82 – 83 Discovering Computers 2011: Living in a Digital World 18 Figure 2-8 Chapter 2
- 19. The World Wide Web • Tabbed browsing allows you to open and view multiple Web pages in a single Web browser window Click to view Web Link, click Chapter 2, Click Web Link from left navigation, then click Tabbed Browsing below Chapter 2 Page 84 Discovering Computers 2011: Living in a Digital World 19 Figure 2-9 Chapter 2
- 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 categories Page 85 Discovering Computers 2011: Living in a Digital World 20 Chapter 2
- 21. The World Wide Web Page 85 Discovering Computers 2011: Living in a Digital World 21 Figure 2-10 Chapter 2
- 22. The World Wide Web • A search engine is helpful in locating items such as: Images Videos Audio News People or Maps Blogs Businesses Page 85 Discovering Computers 2011: Living in a Digital World 22 Chapter 2
- 23. The World Wide Web Page 86 Discovering Computers 2011: Living in a Digital World 23 Figure 2-11 Chapter 2
- 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 text Page 87 Discovering Computers 2011: Living in a Digital World 24 Figure 2-12 Chapter 2
- 25. The World Wide Web • Search operators can help to refine your search Page 87 Discovering Computers 2011: Living in a Digital World 25 Figure 2-13 Chapter 2
- 26. The World Wide Web • There are thirteen types of Web sites Portal News Informational Business/Marketing Blog Wiki Online Social Educational Network Pages 88 – 91 Discovering Computers 2011: Living in a Digital World 26 Figure 2-15 Chapter 2
- 27. The World Wide Web Entertainment Advocacy Web Application Content Personal Aggregator Pages 91 – 92 Discovering Computers 2011: Living in a Digital World 27 Figure 2-15 Chapter 2
- 28. The World Wide Web • Information presented on the Web must be evaluated for accuracy • No one oversees the content of Web pages Page 92 Discovering Computers 2011: Living in a Digital World 28 Figure 2-16 Chapter 2
- 29. The World Wide Web • Multimedia refers to any application that combines text with: Page 92 Discovering Computers 2011: Living in a Digital World 29 Chapter 2
- 30. The World Wide Web • A graphic is a digital representation of nontext information • Graphic formats include BMP, GIF, JPEG, PNG, and TIFF Page 93 Discovering Computers 2011: Living in a Digital World 30 Figure 2-17 Chapter 2
- 31. The World Wide Web • A thumbnail is a small version of a larger graphic Page 94 Discovering Computers 2011: Living in a Digital World 31 Figure 2-19 Chapter 2
- 32. The World Wide Web • Animation is the appearance of motion created by displaying a series of still images in sequence Page 94 Discovering Computers 2011: Living in a Digital World 32 Chapter 2
- 33. 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 flow Pages 94 – 95 Discovering Computers 2011: Living in a Digital World 33 Figure 2-20 Chapter 2
- 34. The World Wide Web Page 95 Discovering Computers 2011: Living in a Digital World 34 Figure 2-21 Chapter 2
- 35. The World Wide Web • Video consists of full-motion images that are played back at various speeds Click to view Web Link, click Chapter 2, Click Web Link from left navigation, then click YouTube below Chapter 2 Page 96 Discovering Computers 2011: Living in a Digital World 35 Figure 2-22 Chapter 2
- 36. 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 space Pages 96 – 97 Discovering Computers 2011: Living in a Digital World 36 Figure 2-23 Chapter 2
- 37. The World Wide Web • A plug-in is a program that extends the capability of a Web browser Page 97 Discovering Computers 2011: Living in a Digital World 37 Figure 2-24 Chapter 2
- 38. 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 site Click to view Web Link, click Chapter 2, Click Web Link from left navigation, then click Web Page Authoring Software below Chapter 2 Page 98 Discovering Computers 2011: Living in a Digital World 38 Chapter 2
- 39. E-Commerce • E-commerce is a business transaction that occurs over an electronic network – M-commerce identifies e-commerce that takes place using mobile devices Page 98 Discovering Computers 2011: Living in a Digital World 39 Chapter 2
- 40. E-Commerce Business- to- consumer (B2C) E-commerce Business- Consumer- to- to- business consumer (B2B) (C2C) Pages 98 - 99 Discovering Computers 2011: Living in a Digital World 40 Chapter 2
- 41. E-Commerce Click to view Web Link, click Chapter 2, Click Web Link from left navigation, then click Google Checkout Software below Chapter 2 Page 99 Discovering Computers 2011: Living in a Digital World 41 Figure 2-25 Chapter 2
- 42. 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, forward, store, print, and delete e-mail messages Page 101 Discovering Computers 2011: Living in a Digital World 42 Figure 2-26 Chapter 2
- 43. Other Internet Services Page 102 Discovering Computers 2011: Living in a Digital World 43 Figure 2-27 Chapter 2
- 44. 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 name Click to view Web Link, click Chapter 2, Click Web Link from left navigation, then click E-Mail below Chapter 2 Page 103 Discovering Computers 2011: Living in a Digital World 44 Figure 2-28 Chapter 2
- 45. Other Internet Services • Instant messaging (IM) is a real-time Internet communications service Page 104 Discovering Computers 2011: Living in a Digital World 45 Figure 2-29 Chapter 2
- 46. 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 other Click to view Web Link, click Chapter 2, Click Web Link from left navigation, then click Chat Rooms below Chapter 2 Page 105 Discovering Computers 2011: Living in a Digital World 46 Figure 2-30 Chapter 2
- 47. Other Internet Services • VoIP (Voice over IP) enables users to speak to other users over the Internet – Also called Internet telephony Page 106 Discovering Computers 2011: Living in a Digital World 47 Figure 2-31 Chapter 2
- 48. 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 group Page 107 Discovering Computers 2011: Living in a Digital World 48 Figure 2-32 Chapter 2
- 49. 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 FTP Click to view Web Link, click Chapter 2, Click Web Link from left navigation, then click FTP below Chapter 2 Page 107 Discovering Computers 2011: Living in a Digital World 49 Chapter 2
- 50. Netiquette • Netiquette is the code of acceptable Internet behavior Click to view Web Link, click Chapter 2, Click Web Link from left navigation, then click Cyberbullying below Chapter 2 Page 108 Discovering Computers 2011: Living in a Digital World 50 Figure 2-33 Chapter 2
- 51. Summary Browsing, navigating, History and structure of searching, Web World Wide Web the Internet publishing, and e-commerce Other Internet services: e-mail, instant messaging, chat rooms, Rules of netiquette VoIP, newsgroups and message boards, and FTP Page 109 Discovering Computers 2011: Living in a Digital World 51 Chapter 2
- 52. Discovering Computers 2011 Living in a Digital World Chapter 2 Complete