Practical PC, 4e Chapter 8


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Practical PC, 4e Chapter 8

  1. 1. Chapter 8 Browsing and Searching the Web
  2. 2. Browsing and Searching the Web <ul><li>In this Chapter, you will learn: </li></ul><ul><ul><li>What a Web page is </li></ul></ul><ul><ul><li>What a URL is </li></ul></ul><ul><ul><li>How a browser works </li></ul></ul><ul><ul><li>How to use a search engine </li></ul></ul><ul><ul><li>How to save text and graphics found on the Web </li></ul></ul><ul><ul><li>How to create your own Web page </li></ul></ul><ul><ul><li>About protecting and sharing your Internet connection with a router </li></ul></ul>
  3. 3. Web Pages <ul><li>A Web page is a document that can contain text, graphics, videos, sound clips and links to other pages. </li></ul><ul><li>Links between pages are called hypertext links and allow you to follow an information thread. </li></ul><ul><li>A computer linked to the Internet that holds a Web page is called a Web server. </li></ul>
  4. 4. Web Pages <ul><li>A group of related Web pages that contain information about a specific topic (such as a company, person, event, etc.) is called a Web site. </li></ul><ul><li>Each Web site is created and maintained by one or more people called Webmasters. </li></ul><ul><li>The main page on a Web site is called a home page. </li></ul>
  5. 5. Web Pages <ul><li>A Web page often contains many links to other pages. </li></ul><ul><li>These links may be from a particular string of words (called a text link) or from a picture (graphics link). </li></ul><ul><li>When you move your cursor over one of these links, it turns into a hand-shaped link pointer. </li></ul><ul><li>Clicking a link sends a copy of the new page to your PC for you to view. </li></ul>
  6. 6. Web Pages A typical Web page
  7. 7. What’s a URL? <ul><li>Each Web server is located by a specific address called a URL (uniform resource locator). </li></ul><ul><li>URLs are constructed of several pieces: </li></ul><ul><ul><li>Most begin with http:// (Hypertext Transfer Protocol), https:// for secure sights. </li></ul></ul><ul><ul><li>Web server’s name – i.e. </li></ul></ul><ul><ul><li>The top-level domain – i.e. .com, .org, or .edu </li></ul></ul><ul><ul><li>Using these three pieces connects you to the Web site’s home page – </li></ul></ul>
  8. 8. What’s a URL? <ul><li>URLs are constructed of several pieces (cont): </li></ul><ul><ul><li>You can also connect directly to a specific page on the Web site using the folder and file name </li></ul></ul><ul><ul><li>Web pages are normally stored in HTML (Hypertext Markup Language) format </li></ul></ul><ul><ul><li>Path names follow the server name and are separated from it by slashes. </li></ul></ul><ul><ul><li>The world news site on CNN is: </li></ul></ul><ul><ul><li> </li></ul></ul>
  9. 9. What’s a URL? The format of a URL
  10. 10. Using a Web Browser <ul><li>A Web Browser (Browser) is software that reads Web pages and interprets the HTML tags embedded in each page so that it can be displayed on your screen. </li></ul><ul><li>Two popular browsers are Microsoft Internet Explorer and Netscape Navigator. </li></ul><ul><li>Some times in order to display special files or media, you might need to install a special plug-in. </li></ul><ul><li>Browsers often store information about you and your preferences in cookies on your PC. </li></ul>
  11. 11. Using a Web Browser Looking at a Web Browser
  12. 12. Using a Search Engine <ul><li>A search engine is a giant catalog similar to the one at your library that allows you to locate information on Web pages. </li></ul><ul><li>Search engines work with key words or phrases </li></ul><ul><li>Most can handle both simple and combination searches. </li></ul><ul><li>Google and Yahoo are two common search engines. </li></ul>
  13. 13. Using a Search Engine The Google search engine
  14. 14. Saving Text and Graphics from the Web <ul><li>You can print a Web page by using your browser’s print button. </li></ul><ul><li>You can copy text from Web pages by highlighting it and using the copy option on the browser. You can then paste it into any program. </li></ul><ul><li>You can copy graphics from the Web by right-clicking them and using the Save Picture as option. </li></ul><ul><li>Be aware that most information is copyrighted! </li></ul>
  15. 15. Saving Text and Graphics from the Web Copying information from a web site
  16. 16. Hardware – Protecting and sharing your Internet connection with a router <ul><li>DSL and cable connections are always on </li></ul><ul><li>Always-on connection puts the computer at risk of hacking </li></ul><ul><li>A firewall is a software program or hardware device that protects one or more computers from outside intruders </li></ul>
  17. 17. Hardware – Protecting and sharing your Internet connection with a router <ul><li>A router is a hardware device that connects a local area network to a larger network such as the Internet. </li></ul><ul><li>Because most routers use NAT or Network Address Translation, hackers on the Internet typically can only reach the router. </li></ul>
  18. 18. Hardware – Protecting and sharing your Internet connection with a router
  19. 19. Creating your own Web Pages Using Word to create a Web Page
  20. 20. What do you think? The Filtering Controversy <ul><li>If you had children, would you use filtering software on your home PC to block access to certain Web sites? </li></ul><ul><li>Do you think schools and public libraries that provide Internet access to children should use filtering software? </li></ul><ul><li>Do you believe that in some situations it is appropriate to use filtering software on computers accessed only by adults? </li></ul>
  21. 21. Chapter Summary <ul><li>You should now be able to: </li></ul><ul><ul><li>Understand how to locate Web sites. </li></ul></ul><ul><ul><li>Understand what the parts of a Web Page URL mean. </li></ul></ul><ul><ul><li>Work with a Web browser </li></ul></ul><ul><ul><li>Use a search engine </li></ul></ul><ul><ul><li>Save and print text and graphics from a Web page </li></ul></ul><ul><ul><li>Understand how to protect and share your Internet connection with a router </li></ul></ul>