Lesson 1 What Is the World Wide Web?
Lesson 1 What Is the World Wide Web?. Objectives Upon completion of this lesson, you should be able to: Explain what the World Wide Web is and how it.
Dec 31, 2015
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Lesson 1
What Is the World Wide Web?
Objectives
Upon completion of this lesson, you should be able to:• Explain what the World Wide Web is and how it works.• Identify the elements of a Web browser and explain how
the browser works.• Tell what determines how fast a Web page loads.• Create a simple Web document.
How Does the Web Work?
The Web is a new form of mass communication:
– Made up of collections of Web pages called Web sites.
– Web pages are easy to create and are accessible to everyone.
– The Web is part of the Internet: A Global Communications Network.
Step-by-Steps 1.1 & 1.2
How Does the Web Work?
Computers request information from servers:
– Browsers on computers use URLs (www.disney.com) to locate Web pages on Servers.
– Routers locate the requesting computers and Web servers.
Step-by-Steps 1.1 & 1.2
How Does the Web Work?
Packets:– Servers break information
into little bundles called packets.
– Routers send packets to their destination.
– If packets get lost, they are requested and sent again.
Step-by-Steps 1.1 & 1.2
Your Connection to the Web
Web browser:– Puts packets back
together.– Interprets HTML tags on
Web pages and displays Web content.
Step-by-Steps 1.3, 1.4, & 1.5
Your Connection to the Web
Web browser displays:– Search tools.– Hyperlinks to proceed to
pages.– Back button to return
from pages.
Step-by-Steps 1.3, 1.4, & 1.5
Your Connection to the Web
Web browser’s parts:– Navigation buttons– Address box– Status icon– Content area– Status bar
Enter URLs:– www.course.com– www.geocities.com– www.altavista.com
Step-by-Steps 1.3, 1.4, & 1.5
Your Connection to the Web
Web indexes and search tools:
– Yahoo!– AltaVista– Google
Enter URLs:– www.yahoo.com– www.altavista.com– www.google.com
Step-by-Steps 1.3, 1.4, & 1.5An index organizes pages by topics.
Search tools search by keywords.
How Fast Is the Web?
Step-by-Step 1.6
Text browsers don’t.
GUI browsers show pictures.
How Fast Is the Web?
Web speed is determined by:
– Size of Web page.– User’s connection
speed.– Internet Traffic.– Server’s connection
speed.– Web server speed.
Step-by-Step 1.6
How Fast Is the Web?
Graphics take longer to load.
Text pages load faster.
Step-by-Step 1.6
Making a Simple Web Page
Web pages are made up of tags:
– Opening or starting tags
– Angle brackets– Information to be
displayed in content area
– Closing tags
<HTML>
<HEAD></HEAD>
<BODY>
Hello, my name is ____.
</BODY>
</HTML>
Step-by-Step 1.7
Making a Simple Web Page
<HTML>
<HEAD></HEAD>
<BODY>
Hello, my name is ____.
</BODY>
</HTML>
Step-by-Step 1.7
These tags will create this Web page.
Summary
In this lesson, you learned: What the World Wide Web is and how it works. To identify the elements of a Web browser and explain
how the browser works. To determine how fast a Web page loads. To create a simple Web document.
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