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Browsing the web


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Browsing the web

  2. 2. WHAT IS THE WEB? Web = World Wide Web HTTP = Hypertext Transfer Protocol The Web is NOT the same as the Internet Web page = a specially coded document that can contain text, graphics, videos, animations, audio and interactive elements Web server = a computer attached to the Internet that runs special Web server software Web site = one or more Web pages located on a Web server
  3. 3. WHAT IS A URL? URL = Uniform Resource Locator protocol Server Name Domain Folder Name File Name
  4. 4. Unique URLCan includeicons, buttons,media, andother interactiveelements Most Web pages contain graphics, and some include audio, video, or animations. Usually include text
  5. 5. Underlinedpassages of textare hypertextlinks.
  6. 6. WHAT IS HTML? HTML = Hypertext Markup Language HTML is the special instructions authors use to specify how a document should be displayed as a Web page Web pages are created using HTML
  7. 7. WHAT’S ON THE WEB? Commercial Academic and research sites Organizational and government sites Search sites and portals Social networking sites Public forums Media sites
  8. 8. WHAT’S A WEB BROWSER? Web browser = a program that runs on your computer and helps you access Web pages The browser you use depends on your computer platform and personal preference It is a good idea to upgrade when a new version becomes available (most are free)
  9. 9. POPULAR BROWSERSMicrosoft Internet Explorer Mozilla Firefox First published in 1995  Descendant of the first Undergone several graphical revisions browser, Netscape Navigator Included with Windows operating system  Open source software (that means free!) Most popular browser on the PC platform  May be a more secure browsing environment
  10. 10. POPULAR BROWSERS (CONT.) Google Chrome  One of the most recently developed browsers  Known for its streamlined design  Billed for its speed and security  Available from Google’s Web site (FREE!)
  11. 11. HOW DO I START MY BROWSER? Click the icon on the taskbar (or the desktop) If you want to display more than one Web page at a time, open a 2nd window or a 2nd tab To keep a Web page open while linking to another page = hold down the Ctrl key while clicking the link Enter keywords in the Search box (click the down arrow and select Find on this page to search just the displayed page Refresh button = a fresh copy of the Web page Stop button = use when a page takes too long to load
  12. 12. YOUR TURN!1. Start your browser (Internet Explorer)2. Open a 2nd window3. Open a 2 nd tab4. Keep a web page open while linking to another page
  13. 13. Navigation buttons Refresh and Stop buttons Search box Address box Favorites buttons Toolbar Tabs Scroll bar Web page display area
  14. 14. HOW DO I USE A URL TO GO TO AWEB SITE?1. Click the address box2. Type then URL, then press the Enter key You must be very precise when entering a URL (no spaces, duplicate upper and lower case letters, etc.) A complete URL usually starts with http:// (you don’t usually have to type this part though)
  15. 15. YOUR TURN!1. Click the address box2. Find the Seattle Seahawks 2011 schedule by typing the following address season-schedule.html
  16. 16. Back button NAVIGATION BUTTONS Forward button Hyperlinks Recent Pages list help you jump to new Web pages. Navigation buttons help you jump  When you first start your browser, the back to Back and Forward buttons are pages you’ve disabled (or “grayed out”) already viewed.  Forward button counteracts the back button  Recent Pages list displays a list of Web sites visited during a session
  17. 17. Address bar list NAVIGATION BUTTONS Home button (CONT.)  Home button displays your home page (the page that always appears when you first start your browser  Address bar list keeps track of URLs you’ve entered in the Address bar (useful when you want to return to any site you usually access)
  18. 18. HOW DOES THE FAVORITES LIST WORK?1. While displaying one of your favorite sites, click the Favorites button, then Add to Favorites2. Enter the name you want to appear in the 3. Select a Favorites list folder if you want to group related sites 4. Click Add. Once you’ve added a site to the Favorites list, simply click the Favorites button and select the site from the list.
  19. 19. YOUR TURN!1. Add the Seahawks schedule to your favorites list (name it 2011 Seahawk schedule)
  20. 20. HOW DOES THE HISTORY LIST WORK?1. Click the Favorites button 2. Click the History tab. Click the down-arrow if you want to sort the history list by date, site, most visited or time. 3. Click any entry in the History list to view the specified Web page.
  21. 21. HOW DO I FIND INFORMATION ONTHE WEB? Most popular way = use a search engine  Google   Yahoo! Search  Live Search Depending on the search engine you can:  Enter keywords  Fill out a form  Click a series of links to drill down through topics and subtopics
  22. 22. YOUR TURN!1. Using search for Ford2. Using search for “Model T automobile” -club
  23. 23. IS THIS INFORMATION RELIABLE??? The following factors contribute to the quality of information found on the Web:  Reliability: A reliable source has a good track record or quality information  Bias: Examine the mission behind the academic, political, commercial, or media organization that sponsors the Web site  Accessibility: Sites with reliable information usually provide a way to communicate questions, comments, and corrections to the page’s author  Professionalism: Red flags = sites that appear homemade, and sites that contain spelling and grammar errors
  24. 24. IS THIS INFORMATION RELIABLE???(CONT.)  Search ranking: The sites appearing at the top of a search engine list are the most popular and tend to be the most reliable (please note, that does not mean they are ALWAYS the most reliable!)  Venue:  Blogs present the views of the blog owner  Social networking sites often have misleading information  Wikis may accept contributions from participants without subject-matter expertise or qualifications  Validity: Get verification by cross checking other sites and offline sources, such as academic journals and reference books  Completeness: Quality information should address a topic without omitting important details
  25. 25. IS THE WEB SAFE? Many sites are safe, while some try to take advantage of users. To help ensure your safety:  Use a secure connection for sensitive data  The URL for a secure Web connection begins with https instead of http  Look for https in the URL and a padlock icon in the browser window  Block third-party cookies  Monitor temporary Internet files  Run antivirus software  Keep your browser and operating system updated