02-html - HTML Apr 23, 2009 What is the World Wide Web? The...

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Apr 23, 2009 HTML
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2 What is the World Wide Web? The World Wide Web (WWW) is most often called the Web The Web is a network of computers all over the world All the computers in the Web can communicate with each other. All the computers use a communication standard called HTTP ( H ypert ext T ransfer P rotocol )
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3 How does the WWW work? Web information is stored in documents called Web pages Web pages are text files stored on computers called Web servers Computers reading the Web pages are called Web clients Web clients view the pages with a program called a Web browser Popular browsers are: Internet Explorer, Netscape Navigator/Communicator, Safari, Mozilla, Konqueror, and Opera Other browsers are: Omniweb, iCab, etc.
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4 How does the browser fetch pages? A browser fetches a Web page from a server by sending a request A request is a standard HTTP request containing a page address A page address looks like this: http://www.someone.com/page.html A page address is a kind of URL ( Uniform Resource Locator )
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5 How does the browser display pages? All Web pages are ordinary text files All Web pages contain display instructions The browser displays the page by reading these instructions. The most common display instructions are called HTML tags HTML tags look like this: <p>This is a Paragraph</p>
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6 Who makes the Web standards? The Web standards are not made up by Netscape or Microsoft The rule-making body of the Web is the W3C W3C stands for the World Wide Web Consortium W3C puts together specifications for Web standards The most essential Web standards are HTML , CSS and XML The latest HTML standard is XHTML 1.0
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7 What is an HTML File? HTML stands for Hypertext Markup Language An HTML file is a text file containing small markup tags The markup tags tell the Web browser how to display the page An HTML file must have an htm or html file extension .html is preferred .htm extensions are used by servers on very old operating systems that can only handle “8+3” names (eight characters, dot, three characters) An HTML file can be created using a simple text editor Formatted text, such as Microsoft Word’s .doc files, cannot be used in HTML files
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8 HTML Tags HTML tags are used to mark up HTML elements HTML tags are surrounded by angle brackets , and > Most HTML tags come in pairs, like <b> and </b> The tags in a pair are the start tag and the end tag The text between the start and end tags is the element content The tags act as containers (they contain the element content), and should be properly nested HTML tags are not case sensitive;
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This note was uploaded on 12/02/2011 for the course AR 107 taught by Professor Gracegraham during the Fall '11 term at Montgomery College.

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02-html - HTML Apr 23, 2009 What is the World Wide Web? The...

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