This image describes the MVC application architecture.

• The client sends a request to the Controller, which has two parts.
  • The first part is the Controller Servlet.
  • The second part is made up of the ActionHandler Interface, the AbstractActionHandler class, and the ActionHandler Implementation.
• Next, either the Controller or a JSP page accesses the Model, which has two parts.
  • The first part consists of EJB Remote, EJB Home, and EJB Implementation.
  • The second part consists of the Data Access Object Interface and the Data Access Object Implementation.
• The Model accesses the database, and returns information to the JSP page.
• The JSP page then sends a response to the client.

The surrounding text describes the processes associated with this image.