Chapter02
- 2. The Internet The Internet is a worldwide collection of networks that links millions of businesses, government agencies, educational institutions, and individuals Page 74 Figure 2-1 Discovering Computers 2011: Living in a Digital World Chapter 2
- 3. 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 Page 76 Discovering Computers 2011: Living in a Digital World Chapter 2 Click to view Web Link, click Chapter 2, Click Web Link from left navigation, then click W3C below Chapter 2
- 4. 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 Figure 2-2 Discovering Computers 2011: Living in a Digital World Chapter 2
- 5. Evolution of the Internet Page 78 Discovering Computers 2011: Living in a Digital World Chapter 2 Click to view Web Link, click Chapter 2, Click Web Link from left navigation, then click Wireless Modems below Chapter 2
- 6. Evolution of the Internet Page 79 Figure 2-3 Discovering Computers 2011: Living in a Digital World Chapter 2
- 7. 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 Figure 2-4 Discovering Computers 2011: Living in a Digital World Chapter 2
- 8. Evolution of the Internet Page 80 Figure 2-5 Discovering Computers 2011: Living in a Digital World Chapter 2
- 9. 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 Chapter 2
- 10. The World Wide Web A Web browser , or browser , allows users to access Web pages and Web 2.0 programs Page 81 Discovering Computers 2011: Living in a Digital World Chapter 2
- 11. The World Wide Web Page 81 Figure 2-6 Discovering Computers 2011: Living in a Digital World Chapter 2
- 12. The World Wide Web A home page is the first page that a Web site displays Web pages provide links to other related Web pages Surfing the Web Downloading is the process of receiving information Pages 82 - 83 Figure 2-7 Discovering Computers 2011: Living in a Digital World Chapter 2 Some Web pages are designed specifically for microbrowsers Click to view Web Link, click Chapter 2, Click Web Link from left navigation, then click iPhone below Chapter 2
- 13. The World Wide Web A Web page has a unique address called a URL or Web address Pages 82 – 83 Figure 2-8 Discovering Computers 2011: Living in a Digital World Chapter 2
- 14. The World Wide Web Two types of search tools are search engines and subject directories Page 85 Discovering Computers 2011: Living in a Digital World Chapter 2
- 15. The World Wide Web Page 85 Figure 2-10 Discovering Computers 2011: Living in a Digital World Chapter 2
- 16. The World Wide Web There are thirteen types of Web sites Pages 88 – 91 Figure 2-15 Discovering Computers 2011: Living in a Digital World Chapter 2
- 17. The World Wide Web Pages 91 – 92 Figure 2-15 Discovering Computers 2011: Living in a Digital World Chapter 2
- 18. The World Wide Web Multimedia refers to any application that combines text with: Page 92 Discovering Computers 2011: Living in a Digital World Chapter 2
- 19. The World Wide Web A graphic is a digital representation of nontext information Graphic formats include BMP, GIF, JPEG, PNG, and TIFF Discovering Computers 2011: Living in a Digital World Chapter 2
- 20. The World Wide Web Animation is the appearance of motion created by displaying a series of still images in sequence Discovering Computers 2011: Living in a Digital World Chapter 2
- 21. 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 Figure 2-20 Discovering Computers 2011: Living in a Digital World Chapter 2
- 22. The World Wide Web Video consists of full-motion images that are played back at various speeds Page 96 Figure 2-22 Discovering Computers 2011: Living in a Digital World Chapter 2 Click to view Web Link, click Chapter 2, Click Web Link from left navigation, then click YouTube below Chapter 2
- 23. 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 Figure 2-23 Discovering Computers 2011: Living in a Digital World Chapter 2
- 24. The World Wide Web A plug-in is a program that extends the capability of a Web browser Page 97 Figure 2-24 Discovering Computers 2011: Living in a Digital World Chapter 2
- 25. Other Internet Services Instant messaging ( IM ) is a real-time Internet communications service Page 104 Figure 2-29 Discovering Computers 2011: Living in a Digital World Chapter 2
- 26. 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 Page 105 Figure 2-30 Discovering Computers 2011: Living in a Digital World Chapter 2 Click to view Web Link, click Chapter 2, Click Web Link from left navigation, then click Chat Rooms below Chapter 2
- 27. Other Internet Services VoIP (Voice over IP) enables users to speak to other users over the Internet Also called Internet telephony Page 106 Figure 2-31 Discovering Computers 2011: Living in a Digital World Chapter 2
- 28. 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 Figure 2-32 Discovering Computers 2011: Living in a Digital World Chapter 2
- 29. 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 Page 107 Discovering Computers 2011: Living in a Digital World Chapter 2 Click to view Web Link, click Chapter 2, Click Web Link from left navigation, then click FTP below Chapter 2