Introduction
It is true that web has become most important element in all type of business activities and communication and exchange of information over the last two decades.Web provides a place for marketers to show thier products and for customers to view and visit sites.Then there is a need to build interact applications over the web to provide all these type of facilities.
What is Web Application
A web-application is a simple computer program which allows visitors to interact with the sites and provides a secure interface which allows to submit / retrieve information to / from a server over the network using browsers.
Web applications resides in a server and can be accessible through net , queries the data repository (database) and dynamically generates the web pages to serve the clients.These pages are in a standard format which can be compatible with all the browsers.There is no restriction of clients O.S , browsers.
Web application Work Flow
Following diagram explains how a web application works in a detailed way for 3-Layered architecture.
Layer 1 :Client side Browser
Layer 2: Server side page generation technologies like JSP , ASP.
Layer 3: Data repository
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