An application that is available in server system and is executed via network call or web request is called Internet application.
we have two types of Internet applications
1) Web supportive application
2) Web application
Web Supportive Application:
An application that is resided in server and that is downloaded and executed by client computer with a web request is called web supportive application.
Java has given a concept called applet to support developing web supportive application.Below diagram shows web supportive application
Web Application:
An application that is reside in server system and that is executed in server system itself via web request and finally just sends the output to client is called web application. sun has given a technology called servlet,jsp to develop web application.Below diagram shows web application.
Comment for any doubts.....