What is HTML?

Hypertext Markup Language ( HTML) codes are used to create links. These links can be textual or graphic, and when clicked on, can "link" the user to another resource such as other HTML documents, text files, graphics, animation and sound.

Tim Berners-Lee, working at CERN in Switzerland, posts the first computer code of the World Wide Web in the newsgroup, “alt.hypertext” introducing the ability to combine words, pictures, and sounds on Web pages.

What is HTTP?

• The protocol that “processes” HTML
  
• Client/Server based
  
• Hypertext, graphics, animation, sound
  
• Access to other protocols

HTTP allows the client (Your PC) to establish a connection to the server (the Page you are looking at) and make a request. The server accepts the connection initiated by the client and sends back a response.

When a user selects a hypertext link, the client program on their computer uses HTTP to contact the server, identify a resource, and ask the server to respond with an action. The server accepts the request, and then uses HTTP to respond to or perform the action.

For example, when you select the following hypertext link, you are identifying a particular resource, and asking the server to send it back to your computer in a format that your computer can display.