- 1. What is WAS Provides the infrastructure for running applications that run your business. Common environment and programming model for your applications.Platform for developing and Deploying web services and SOA based apps Secure, Scalable, reliable transaction engine for ERP IBM WebSphere is architected to enable you to build business-critical applicationsfor the Web WebSphere includes a wide range of products that help you develop and serveWeb applications. They are designed to make it easier for clients to build, deploy, and managedynamic Web sites more productively WAS implements J2EE specificationWebSphere Application Server provides the environment to run your Web-enabled e-businessapplications. An application server functions as Web middleware or a middletier in a three-tier e-business environment. The first tier is the HTTP server thathandles requests from the browser client. The third tier is the business database (forexample, DB2 UDB for iSeries) and the business logic (for example, traditionalbusiness applications, such as order processing). The middle tier is WebSphereApplication Server, which provides a framework for a consistent and architected linkbetween the HTTP requests and the business data and logic.