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Chapter 2 Browsing the Web

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Chapter 2 Browsing the Web

  1. 1. Chapter 2: Browsing the Web Discovering the Internet: Brief Concepts and Techniques, Second Edition Discovering the Internet Complete Concepts and Techniques, Second Edition
  2. 2. Objectives <ul><li>Describe a Web site, common Web page characteristics, and Web servers </li></ul><ul><li>Explain the role IP addresses, domain names, and URLs play in locating Web pages </li></ul><ul><li>Start a Web browser and view Web pages </li></ul><ul><li>Revisit Web pages using browser and desktop shortcuts </li></ul>
  3. 3. Objectives (cont'd) <ul><li>Describe ways to save online information for later use </li></ul><ul><li>Demonstrate how to change Web browser options </li></ul><ul><li>Discuss the risks and safeguards related to using the Web </li></ul>
  4. 4. Web Sites, Web Pages, and Web Servers <ul><li>Web Sites </li></ul><ul><ul><li>Home page is the primary page </li></ul></ul><ul><ul><li>Number of pages varies depending on site’s purpose and type of content </li></ul></ul><ul><ul><li>FAQ page lists frequently asked questions and their answers </li></ul></ul><ul><ul><li>A portal is a special type of Web site that offers a doorway or starting point for browsing the Web </li></ul></ul>
  5. 5. A multipage Web site consists of a home page and linked subsidiary pages.
  6. 6. Web portals can provide a broad range of information and services or can focus on a specific interest.
  7. 7. Web Sites, Web Pages, and Web Servers (cont'd) <ul><li>Web Pages </li></ul><ul><ul><li>Designed to attract visitors and hold their attention </li></ul></ul><ul><ul><li>Common characteristics </li></ul></ul><ul><ul><ul><li>Logo and name </li></ul></ul></ul><ul><ul><ul><li>Images </li></ul></ul></ul><ul><ul><ul><li>Links </li></ul></ul></ul><ul><ul><ul><li>Advertisements </li></ul></ul></ul><ul><ul><ul><li>Search tool </li></ul></ul></ul><ul><ul><ul><li>Copyright statement and link to privacy policy statement </li></ul></ul></ul>
  8. 8. Web Sites, Web Pages, and Web Servers (cont'd) <ul><li>Web Servers </li></ul><ul><ul><li>Browser is a client that requests resources from a server </li></ul></ul><ul><ul><li>Server “serves up” resources upon request </li></ul></ul><ul><ul><ul><li>Web browsing is example of client-server computing </li></ul></ul></ul>
  9. 9. Web Sites, Web Pages, and Web Servers (cont'd) <ul><li>Web Servers (cont'd) </li></ul><ul><ul><li>Single Web server can host multiple Web sites </li></ul></ul><ul><ul><li>Large Web sites may span multiple servers </li></ul></ul>
  10. 10. <ul><li>IP Addresses </li></ul><ul><ul><li>A number that uniquely identifies each computer or device on a network </li></ul></ul><ul><ul><li>A series of four numbers separated by a period or dot </li></ul></ul><ul><ul><ul><li>167.68.24.104 </li></ul></ul></ul><ul><ul><ul><li>Static IP addresses seldom change </li></ul></ul></ul><ul><ul><ul><li>Dynamic IP addresses are temporary </li></ul></ul></ul>IP Addresses, Domain Names, and URLs
  11. 11. IP Addresses, Domain Names, and URLs (cont'd) <ul><li>Domain Names </li></ul><ul><ul><li>A text alias for an IP address </li></ul></ul><ul><ul><ul><li>thomsonlearning.com is domain name for 167.68.24.104 </li></ul></ul></ul><ul><ul><li>Domain Name System (DNS) uses name servers to resolve domain name to IP address </li></ul></ul><ul><ul><ul><li>Managed by ICANN </li></ul></ul></ul><ul><ul><ul><li>TLD (.com, .biz, and so forth) </li></ul></ul></ul><ul><ul><ul><li>ccTLD (.us, .uk, and so forth) </li></ul></ul></ul>
  12. 12. Domains in the DNS are grouped by type of organization.
  13. 13. IP Addresses, Domain Names, and URLs (cont'd) <ul><li>Uniform Resources Locators (URLs) </li></ul><ul><ul><li>A unique Web address </li></ul></ul><ul><ul><ul><li>http:// protocol </li></ul></ul></ul><ul><ul><ul><li>Domain name </li></ul></ul></ul><ul><ul><ul><li>Path </li></ul></ul></ul><ul><ul><ul><li>File name </li></ul></ul></ul>
  14. 14. Web Browsers <ul><li>Software program used to view Web pages </li></ul><ul><li>Most commonly used Web browser is Internet Explorer, others include </li></ul><ul><ul><li>Netscape </li></ul></ul><ul><ul><li>Opera </li></ul></ul><ul><ul><li>Deepnet Explorer </li></ul></ul><ul><ul><li>Firefox </li></ul></ul><ul><li>Illustrations in the text use Internet Explorer v. 7.0 </li></ul><ul><li>Appendix A discusses other browsers </li></ul>
  15. 15. Internet Explorer v. 7.0 Web browser.
  16. 16. Web Browsers (cont'd) <ul><li>Starting the Browser and Loading a Web Page </li></ul><ul><ul><li>Double-click the IE icon on the Windows desktop </li></ul></ul><ul><ul><li>Type the Web page URL in the Address box on the Address bar </li></ul></ul><ul><ul><li>Click the Go button or press the Enter key </li></ul></ul>
  17. 17. Start IE 7 from the Start menu or desktop icon; the browser opens with its default starting or home page(s).
  18. 18. Web Browsers (cont'd) <ul><li>Clicking a Link and Using Web Page Features </li></ul><ul><ul><li>Links (hyperlinks) allow users to jump to a new location in the same page, to another page at the same Web site, or to a page at another Web site </li></ul></ul><ul><ul><li>Web pages offer links and other features that allow you to view additional information </li></ul></ul>
  19. 19. Discovering the Internet, Second Edition Student Online Companion home page.
  20. 20. Web Browsers (cont'd) <ul><li>Navigating Recently Viewed Web Pages </li></ul><ul><ul><li>Use the Back, Forward, Recent Pages, Home Stop, and Refresh buttons </li></ul></ul><ul><ul><ul><li>Back and Forward – revisit recently viewed pages </li></ul></ul></ul><ul><ul><ul><li>Recent Pages – list of recently viewed pages </li></ul></ul></ul><ul><ul><ul><li>Home – reload the default home page(s) </li></ul></ul></ul><ul><ul><ul><li>Stop – stop downloading a page </li></ul></ul></ul><ul><ul><ul><li>Refresh – request a fresh copy of the current page from the server </li></ul></ul></ul>
  21. 21. Web Browsers (cont'd) <ul><li>Navigating Recently Viewed Web Pages (cont'd) </li></ul><ul><ul><li>Use the Back, Forward, Recent Pages, Home Stop, and Refresh buttons </li></ul></ul>
  22. 22. Web Browsers (cont'd) <ul><li>Using Tabbed Browsing </li></ul><ul><ul><li>Allows you to open multiple Web pages in a single browser window </li></ul></ul>
  23. 23. Web Browsers (cont'd) <ul><li>Using Tabbed Browsing (cont'd) </li></ul><ul><ul><li>Each page can be opened in its own tab in the tab row </li></ul></ul><ul><ul><li>Clicking a tab brings the Web page and tab from the tab row background to the foreground </li></ul></ul><ul><ul><li>Click the New Tab button to open a blank tab then enter URL in the Address box to open a Web page in the new tab </li></ul></ul>
  24. 24. Web Browsers (cont'd) <ul><li>Using Tabbed Browsing (cont'd) </li></ul><ul><ul><li>Alternatively, press the Alt key as you enter a URL from the Address box to open the page in a new tab </li></ul></ul><ul><ul><li>Press the Ctrl key or use a shortcut menu to open a linked page in a new tab </li></ul></ul><ul><ul><li>Click the X or Close icon on a tab to close the page </li></ul></ul><ul><ul><li>Close the browser and set options to reopen tabbed pages or close all tabs </li></ul></ul>
  25. 25. Web Browsers (cont'd) <ul><li>Using Tabbed Browsing (cont'd) </li></ul><ul><ul><li>Some tabs are hidden when you open more than six pages because of space limitations in the tab row </li></ul></ul><ul><ul><ul><li>Click the tab scrolling buttons to view hidden tabs </li></ul></ul></ul><ul><ul><ul><li>Click the Quick Tabs button to view all open pages in thumbnail miniatures; click a thumbnail to bring that tab to the foreground </li></ul></ul></ul><ul><ul><ul><li>Click the Tab List button to view a list of all open pages; click a page in the list to bring that tab to the foreground </li></ul></ul></ul>
  26. 26. Using Browser and Desktop Shortcuts to Revisit Web Pages <ul><li>Using the Address list </li></ul><ul><ul><li>Address list appears when you start typing a URL in the Address box </li></ul></ul><ul><ul><li>Click a URL in the Address list to revisit the page </li></ul></ul>
  27. 27. <ul><li>Creating and Using a Favorite </li></ul><ul><ul><li>A favorite is a shortcut to a frequently viewed Web page </li></ul></ul><ul><ul><li>Click the Add to Favorites button and click Add to Favorites </li></ul></ul><ul><ul><ul><li>Add a favorite to the Favorites list </li></ul></ul></ul><ul><ul><ul><li>Create a folder in which to store the favorite, if desired </li></ul></ul></ul><ul><ul><ul><li>Click the Favorites button in the Favorites Center to view the Favorites list </li></ul></ul></ul>Using Browser and Desktop Shortcuts to Revisit Web Pages (cont'd)
  28. 28. Create a favorite to a frequently visited Web page and store it in a specific subfolder in the Favorites folder.
  29. 29. <ul><li>Creating and Using a Favorite (cont'd) </li></ul><ul><ul><li>Save a group of tabbed pages as a single favorite </li></ul></ul>Using Browser and Desktop Shortcuts to Revisit Web Pages (cont'd)
  30. 30. <ul><li>Creating and Using a Favorite (cont'd) </li></ul><ul><ul><li>Organize your favorites by adding, renaming, and deleting subfolders </li></ul></ul>Using Browser and Desktop Shortcuts to Revisit Web Pages (cont'd)
  31. 31. <ul><li>Creating and Using a Favorite (cont'd) </li></ul><ul><ul><li>Share your favorites among different browsers and/or different computers using the Import/Export Wizard </li></ul></ul>Using Browser and Desktop Shortcuts to Revisit Web Pages (cont'd)
  32. 32. <ul><li>Using the History List </li></ul><ul><ul><li>Click the History button in the Favorites Center </li></ul></ul><ul><ul><ul><li>List contains URLs for Web pages visited during the past several days </li></ul></ul></ul><ul><ul><ul><li>URLs are organized into Web site folders by day and week </li></ul></ul></ul>Using Browser and Desktop Shortcuts to Revisit Web Pages (cont'd)
  33. 33. <ul><li>Creating a Web Page Desktop Shortcut </li></ul><ul><ul><li>Drag the Web page icon from the Address box to the desktop to create a shortcut </li></ul></ul>Using Browser and Desktop Shortcuts to Revisit Web Pages (cont'd)
  34. 34. Saving Online Information <ul><li>Printing a Web Page </li></ul><ul><ul><li>Preview the page to see how it will look before printing it </li></ul></ul><ul><ul><li>Print selected information </li></ul></ul><ul><ul><li>Print the entire page </li></ul></ul>
  35. 35. Saving Online Information (cont'd) <ul><li>Saving a Web Page </li></ul><ul><ul><li>Webpage, complete (HTML page and all related files) </li></ul></ul><ul><ul><li>Web Archive, single file (snapshot of page) </li></ul></ul><ul><ul><li>Webpage, HTML only (no related files are saved) </li></ul></ul><ul><ul><li>Text file (page text is saved in plain text format) </li></ul></ul>
  36. 36. Saving Online Information (cont'd) <ul><li>E-mailing a Web Page </li></ul><ul><ul><li>Send a page or a link to a page using commands on the Page button on the Command bar </li></ul></ul><ul><li>Saving a Web Page Image </li></ul><ul><ul><li>Use a shortcut menu </li></ul></ul><ul><ul><li>Note that all Web page content, including images, are protected by copyright law </li></ul></ul>
  37. 37. Saving Online Information (cont'd) <ul><li>Adding Web Content to the Active Desktop </li></ul><ul><ul><li>Windows Active Desktop feature supports the display of dynamic Web content on the desktop </li></ul></ul><ul><ul><li>Right-drag Web page icon from the Address box to the desktop; click Create Active Desktop items Here on the shortcut menu </li></ul></ul><ul><ul><ul><li>Displays static information when offline </li></ul></ul></ul><ul><ul><ul><li>Displays dynamic information when online </li></ul></ul></ul>
  38. 38. Changing Browser Options <ul><li>Showing and Hiding the Menu Bar and Toolbars </li></ul><ul><ul><li>Turn on or off menu bar, Links bar and plug-in toolbars using the Tools button on the Command bar </li></ul></ul><ul><ul><li>Press Alt key to toggle on/off the menu bar </li></ul></ul>
  39. 39. Changing Browser Options (cont'd) <ul><li>Customizing the Command Bar </li></ul><ul><ul><li>Use the Tools button on the Command bar </li></ul></ul><ul><ul><li>Add or remove buttons or modify text labels </li></ul></ul>
  40. 40. Changing Browser Options (cont'd) <ul><li>Changing the Browser's Home Page </li></ul><ul><ul><li>Starting or home page may be a single page or multiple tabbed pages </li></ul></ul><ul><ul><li>Click the Home button arrow on the Command bar to add or remove pages from the Home page set </li></ul></ul>
  41. 41. Changing Browser Options (cont'd) <ul><li>Zooming a Web Page </li></ul><ul><ul><li>Change the &quot;zoom&quot; percentage using the Change Zoom Level button on the status bar </li></ul></ul>
  42. 42. Changing Browser Options (cont'd) <ul><li>Setting Other Browser Options </li></ul><ul><ul><li>Use the Internet Options dialog box to set browser options </li></ul></ul><ul><ul><ul><li>Number of days browsing history is maintained </li></ul></ul></ul><ul><ul><ul><li>Tab settings </li></ul></ul></ul><ul><ul><ul><li>Instant Search box settings </li></ul></ul></ul>
  43. 43. Using the Web: Risks and Safeguards <ul><li>Protecting Your Computer from Hackers </li></ul><ul><ul><li>A hacker is individual who uses computer skills to access a network without authorization </li></ul></ul><ul><ul><li>A firewall is hardware and/or software that blocks outside intruders </li></ul></ul><ul><ul><ul><li>Home computers: install a personal firewall to protect against hackers </li></ul></ul></ul><ul><ul><ul><ul><li>BlackICE PC Protection </li></ul></ul></ul></ul><ul><ul><ul><ul><li>McAfee VirusScan Plus </li></ul></ul></ul></ul><ul><ul><ul><ul><li>Norton Personal Firewall </li></ul></ul></ul></ul>
  44. 44. <ul><li>Protecting Your Computer from Viruses </li></ul><ul><ul><li>A computer virus is a small, potentially damaging computer program that can infect a computer and then spread to other computers through </li></ul></ul><ul><ul><ul><li>Sending/receiving e-mail </li></ul></ul></ul><ul><ul><ul><li>Downloading files </li></ul></ul></ul><ul><ul><ul><li>Exchanging word processing or spreadsheet files </li></ul></ul></ul><ul><ul><li>Install virus protection software to protect against infection </li></ul></ul>Using the Web: Risks and Safeguards (cont'd)
  45. 45. Using the Web: Risks and Safeguards (cont'd) <ul><li>Shopping Safely Online </li></ul><ul><ul><li>Use reputable online vendors </li></ul></ul><ul><ul><li>Pay with a credit card over a secure (SSL) connection </li></ul></ul><ul><ul><li>Use a third-party payment service if participating in online auctions </li></ul></ul>
  46. 46. Using the Web: Risks and Safeguards (cont'd) <ul><li>Filtering Out Objectionable Online Content </li></ul><ul><ul><li>Web is a largely unregulated environment </li></ul></ul><ul><ul><ul><li>Use blocking software (content filters) </li></ul></ul></ul><ul><ul><ul><li>Use the IE Content Advisor </li></ul></ul></ul>
  47. 47. Using the Web: Risks and Safeguards (cont'd) <ul><li>Protecting Against Phishing Sites </li></ul><ul><ul><li>A phishing site is a phony site designed to look like a legitimate site </li></ul></ul><ul><ul><li>Used by thieves to collect personal information </li></ul></ul><ul><ul><ul><li>Name </li></ul></ul></ul><ul><ul><ul><li>Address </li></ul></ul></ul><ul><ul><ul><li>Social Security number </li></ul></ul></ul><ul><ul><ul><li>Bank account information </li></ul></ul></ul><ul><ul><ul><li>Credit card information </li></ul></ul></ul><ul><ul><li>IE 7 has built-in Phishing Filter that evaluates sites </li></ul></ul>
  48. 48. Using the Web: Risks and Safeguards (cont'd) <ul><li>Managing Pop-ups </li></ul><ul><ul><li>Pop-up advertising windows can be annoying </li></ul></ul><ul><ul><li>IE7 has a built-in Pop-up Blocker </li></ul></ul><ul><ul><ul><li>You can set options to control pop-ups </li></ul></ul></ul>
  49. 49. Using the Web: Risks and Safeguards (cont'd) <ul><li>Keeping Your Personal Information Private </li></ul><ul><ul><li>Employers have the right to monitor use of computer equipment and Internet access by their employees </li></ul></ul><ul><ul><li>ECPA and Patriot Act govern what personal information can be collected by the government </li></ul></ul><ul><ul><li>Look for and read Web sites' posted privacy policies and statements </li></ul></ul>
  50. 50. Using the Web: Risks and Safeguards (cont'd) <ul><li>Keeping Your Personal Information Private (cont'd) </li></ul><ul><ul><li>At e-business sites, look for membership in TRUSTe program which sets rules for how members gather, use, and protect personal information at member sites </li></ul></ul>
  51. 51. Using the Web: Risks and Safeguards (cont'd) <ul><li>Keeping Your Personal Information Private (cont'd) </li></ul><ul><ul><li>Be aware of cookies </li></ul></ul><ul><ul><ul><li>Text files stored on a computer’s hard drive used by companies to store information to customize Web pages, store passwords, track browsing activities, and target advertising </li></ul></ul></ul><ul><ul><li>Be aware of Web bugs or beacons </li></ul></ul><ul><ul><ul><li>Hidden graphics embedded in Web pages that collect information </li></ul></ul></ul>
  52. 52. Using the Web: Risks and Safeguards (cont'd) <ul><li>Keeping Your Personal Information Private (cont'd) </li></ul><ul><ul><li>Change the privacy settings in the Privacy tab in the Internet Options dialog box to control the type of cookies you accept </li></ul></ul><ul><ul><li>Install software to protect against Web bugs </li></ul></ul><ul><ul><li>Review Web site privacy policy statements </li></ul></ul><ul><ul><li>Opt-out of personal information collection at Web sites </li></ul></ul>
  53. 53. Chapter Review <ul><li>The Web is a dynamic environment containing millions of Web sites and billions of pages </li></ul><ul><li>The number of pages at a Web site varies; but the primary page is the home page </li></ul><ul><li>A Web portal is a special type of Web site that acts as a starting point or doorway to Web content and services </li></ul><ul><li>The interaction between a Web browser and a Web server is an example of client/server computing </li></ul>
  54. 54. Chapter Review (cont'd) <ul><li>An IP address is the unique numerical address of a computer on a network </li></ul><ul><li>A domain name is an easy-to-remember text alias for one or more IP addresses </li></ul><ul><li>A URL or Web address is the unique address of a Web page </li></ul>
  55. 55. Chapter Review (cont'd) <ul><li>Start a Web browser by double-clicking the browser icon on the desktop or by clicking All Programs on the Start menu </li></ul><ul><li>Load a Web page by typing the page’s URL in the Address box on the Address bar and clicking the Go button or pressing the Enter key </li></ul><ul><li>Use Back, Forward, Recent Pages, Home, Stop, and Refresh buttons to revisit pages, load the browser's home page, and refresh the current page </li></ul>
  56. 56. Chapter Review (cont'd) <ul><li>Tabbed browsing allows you to open multiple Web pages in the same browser window </li></ul><ul><li>Revisit previously viewed Web pages by clicking a URL in the Address list, by creating and clicking a favorite, or by clicking a URL in the History list </li></ul><ul><li>Print, save, or e-mail a Web page to save its content for later use </li></ul><ul><li>Customize the browser window by showing or hiding the menu bar, toolbars, the Command bar, and by changing the browser's home page set </li></ul>
  57. 57. Chapter Review (cont'd) <ul><li>Install personal firewall software to protect a personal computer from outside intruders </li></ul><ul><li>Shop online from reputable vendors, pay by credit card to limit liability, and use a secure Internet connection for the transaction </li></ul><ul><li>Become familiar with Web site privacy policies and opt-out from information collection at the sites, if desired </li></ul>
  58. 58. Chapter 2 Complete Browsing the Web

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