Lesson 1 What Is the World Wide Web?
Objectives <ul><li>Upon completion of this lesson, you should be able to: </li></ul><ul><li>Explain what the World Wide We...
How Does the Web Work?  <ul><li>The Web is a new form of mass communication: </li></ul><ul><ul><li>Made up of collections ...
How Does the Web Work?  <ul><li>Computers request information from servers: </li></ul><ul><ul><li>Browsers  on computers u...
How Does the Web Work?  <ul><li>Packets: </li></ul><ul><ul><li>Servers  break information into little bundles called packe...
Your Connection to the Web  <ul><li>Web browser: </li></ul><ul><ul><li>Puts packets back together. </li></ul></ul><ul><ul>...
Your Connection to the Web  <ul><li>Web browser displays: </li></ul><ul><ul><li>Search tools. </li></ul></ul><ul><ul><li>H...
Your Connection to the Web  <ul><li>Web browser’s parts: </li></ul><ul><ul><li>Navigation buttons </li></ul></ul><ul><ul><...
Your Connection to the Web  <ul><li>Web indexes and search tools: </li></ul><ul><ul><li>Yahoo! </li></ul></ul><ul><ul><li>...
How Fast Is the Web?  Step-by-Step 1.6 Text browsers don’t. GUI browsers show pictures.
How Fast Is the Web? <ul><li>Web speed is determined by:  </li></ul><ul><ul><li>Size of Web page. </li></ul></ul><ul><ul><...
How Fast Is the Web? <ul><li>Graphics take longer to load. </li></ul><ul><li>Text pages load faster. </li></ul>Step-by-Ste...
Making a Simple Web Page <ul><li>Web pages are made  up of tags:  </li></ul><ul><ul><li>Opening or  starting tags </li></u...
Making a Simple Web Page <ul><li><HTML> </li></ul><ul><li><HEAD></HEAD> </li></ul><ul><li><BODY> </li></ul><ul><li>Hello, ...
Summary <ul><li>In this lesson, you learned: </li></ul><ul><li>What the World Wide Web is and how it works. </li></ul><ul>...
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Lesson 1

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Lesson 1

  1. 1. Lesson 1 What Is the World Wide Web?
  2. 2. Objectives <ul><li>Upon completion of this lesson, you should be able to: </li></ul><ul><li>Explain what the World Wide Web is and how it works. </li></ul><ul><li>Identify the elements of a Web browser and explain how the browser works. </li></ul><ul><li>Tell what determines how fast a Web page loads. </li></ul><ul><li>Create a simple Web document. </li></ul>
  3. 3. How Does the Web Work? <ul><li>The Web is a new form of mass communication: </li></ul><ul><ul><li>Made up of collections of Web pages called Web sites. </li></ul></ul><ul><ul><li>Web pages are easy to create and are accessible to everyone. </li></ul></ul><ul><ul><li>The Web is part of the Internet: A Global Communications Network. </li></ul></ul>Step-by-Steps 1.1 & 1.2
  4. 4. How Does the Web Work? <ul><li>Computers request information from servers: </li></ul><ul><ul><li>Browsers on computers use URLs ( www.disney.com ) to locate Web pages on Servers . </li></ul></ul><ul><ul><li>Routers locate the requesting computers and Web servers. </li></ul></ul>Step-by-Steps 1.1 & 1.2
  5. 5. How Does the Web Work? <ul><li>Packets: </li></ul><ul><ul><li>Servers break information into little bundles called packets. </li></ul></ul><ul><ul><li>Routers send packets to their destination. </li></ul></ul><ul><ul><li>If packets get lost, they are requested and sent again. </li></ul></ul>Step-by-Steps 1.1 & 1.2
  6. 6. Your Connection to the Web <ul><li>Web browser: </li></ul><ul><ul><li>Puts packets back together. </li></ul></ul><ul><ul><li>Interprets HTML tags on Web pages and displays Web content. </li></ul></ul>Step-by-Steps 1.3, 1.4, & 1.5
  7. 7. Your Connection to the Web <ul><li>Web browser displays: </li></ul><ul><ul><li>Search tools. </li></ul></ul><ul><ul><li>Hyperlinks to proceed to pages. </li></ul></ul><ul><ul><li>Back button to return from pages. </li></ul></ul>Step-by-Steps 1.3, 1.4, & 1.5
  8. 8. Your Connection to the Web <ul><li>Web browser’s parts: </li></ul><ul><ul><li>Navigation buttons </li></ul></ul><ul><ul><li>Address box </li></ul></ul><ul><ul><li>Status icon </li></ul></ul><ul><ul><li>Content area </li></ul></ul><ul><ul><li>Status bar </li></ul></ul><ul><li>Enter URLs: </li></ul><ul><ul><li>www.course.com </li></ul></ul><ul><ul><li>www.geocities.com </li></ul></ul><ul><ul><li>www. altavista .com </li></ul></ul>Step-by-Steps 1.3, 1.4, & 1.5
  9. 9. Your Connection to the Web <ul><li>Web indexes and search tools: </li></ul><ul><ul><li>Yahoo! </li></ul></ul><ul><ul><li>AltaVista </li></ul></ul><ul><ul><li>Google </li></ul></ul><ul><li>Enter URLs: </li></ul><ul><ul><li>www.yahoo.com </li></ul></ul><ul><ul><li>www.altavista.com </li></ul></ul><ul><ul><li>www.google.com </li></ul></ul>Step-by-Steps 1.3, 1.4, & 1.5 An index organizes pages by topics. Search tools search by keywords.
  10. 10. How Fast Is the Web? Step-by-Step 1.6 Text browsers don’t. GUI browsers show pictures.
  11. 11. How Fast Is the Web? <ul><li>Web speed is determined by: </li></ul><ul><ul><li>Size of Web page. </li></ul></ul><ul><ul><li>User’s connection speed. </li></ul></ul><ul><ul><li>Internet Traffic. </li></ul></ul><ul><ul><li>Server’s connection speed. </li></ul></ul><ul><ul><li>Web server speed. </li></ul></ul>Step-by-Step 1.6
  12. 12. How Fast Is the Web? <ul><li>Graphics take longer to load. </li></ul><ul><li>Text pages load faster. </li></ul>Step-by-Step 1.6
  13. 13. Making a Simple Web Page <ul><li>Web pages are made up of tags: </li></ul><ul><ul><li>Opening or starting tags </li></ul></ul><ul><ul><li>Angle brackets </li></ul></ul><ul><ul><li>Information to be displayed in content area </li></ul></ul><ul><ul><li>Closing tags </li></ul></ul><ul><li><HTML> </li></ul><ul><li><HEAD></HEAD> </li></ul><ul><li><BODY> </li></ul><ul><li>Hello, my name is ____. </li></ul><ul><li></BODY> </li></ul><ul><li></HTML> </li></ul>Step-by-Step 1.7
  14. 14. Making a Simple Web Page <ul><li><HTML> </li></ul><ul><li><HEAD></HEAD> </li></ul><ul><li><BODY> </li></ul><ul><li>Hello, my name is ____. </li></ul><ul><li></BODY> </li></ul><ul><li></HTML> </li></ul><ul><li>These tags will create this Web page. </li></ul>Step-by-Step 1.7
  15. 15. Summary <ul><li>In this lesson, you learned: </li></ul><ul><li>What the World Wide Web is and how it works. </li></ul><ul><li>To identify the elements of a Web browser and explain how the browser works. </li></ul><ul><li>To determine how fast a Web page loads. </li></ul><ul><li>To create a simple Web document. </li></ul>

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