Why use Servlets & JSPs: an introduction(Head First Servlets and JSP)

　　􀂃 A GET request appends form data to the end of the URL.

　　􀂃 A POST request includes form data in the body of the request.

　　􀂃 A MIME type tells the browser what kind of data the browser is about to receive so that the browser will know what to do with it (render the HTML, display the graphic, play the music, etc.)