Introduction to Architecture Design - WebApp Architecture

The design process for identifying the subsystems making up a system and the
framework for sub-system control and communication is architectural design. An architectural design is :
- early stage in system design process.
- conducted in parallel with other design activities.
- establishes a link among goals established for web application, content, users visiting it, and the navigation criterion.
- identifying system components and their communications.

A web application is an application that is accessed over a network such as the Internet or an intranet.Web application architecture provides an infrastructure that enables a web based system to achieve its business objectives.
The Model View Controller (MVC) architecture decouples the user interface from web application functionality and information content.

The MVC design pattern divides applications into three components:
- The Model maintains the state and data that the application represents.
- The View allows the display of information about the model to the user. It contains all interface specific functions.
- The Controller allows the user to manipulate the application. It coordinates the flow of data between model and view.

Web application architecture is defined within the context of the development environment in which the application is to be implemented.