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Sunday, October 10, 2010

Chapter 1 - Web Fundamentals (Part 1)

Introducing the World Wide Web

  • A network is a structure linking computers together for the purpose of sharing resources such as printers and files.

  • Users typically access a network through a computer called a host or node.

  • A computer that makes a service available to a network is called a server.

  • A computer or other device that requests services from a server is called a client.

  • One of the most common network structures is the client-server network.

  • If the computers that make up a network are close together (within a single department or building), then the network is referred to as a local area network (LAN).

  • A network that covers a wide area, such as several buildings or cities, is called a wide area network (WAN).

  • The largest WAN in existence is the Internet.

  • Today the Internet has grown to include hundreds of millions of interconnected computers, cell phones, PDAs, televisions, and networks.

  • Hypertext Documents

  • An entire collection of linked documents is referred to as a Web site.

  • The hypertext documents within a Web site are known as Web pages.

  • Individual pages can contain text, audio, video, and even programs that can be run remotely.

  • HTML: The Language of the Web

  • A Web page is a text file written in a language called Hypertext Markup Language.

  • A markup language is a language that describes a document’s structure and content.

  • Used to create electronic documents that can be read on many different systems using software called browser.

  • Used to define the content of a document (what it says)

  • To describe the page layout (how it looks)

  • Tools for Creating HTML Documents

  • Basic text editor like Notepad, Wordpad, Textpad

  • HTML Converter - converts formatted text into HTML code.
      Can create the source document in a word processor and then convert it.
      HTML code created using a converter is often longer and more complicated than it needs to be, resulting in larger-than-necessary files.

  • HTML Editor – helps you create an HTML file by inserting HTML codes for you as you work.
      They can save you a lot of time and help you work more efficiently.
      Advantages and limitations similar to those of HTML converters.
      Allow you to set up a Web page quickly.
      Will usually still have to work with HTML code to create a finished document.

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