Vishwamohan.NET

It has been 20 years since the concept of Enterprise Architecture was first introduced in IT industry to provide an Enterprise Solution. I got an opportunity to present my thoughts on Architecture, Design and Patterns for Enterprise Solution. In this presentation, I have tried to cover the architecture which were followed in the past as well as currently being used now in this evolving IT industry. Thus, it also covers the new paradigm of developing an application where main IT players such as Microsoft, Sun etc. are suggesting and implementing the new architecture which looks like the best solution of IT industry today.. [More]

The terms tier and layer are frequently used interchangeably, but actually there is a difference between them: Tiers indicate a physical separation of components, which may mean different assemblies such as DLL, EXE etc on the same server or multiple servers; but layers refers to a logical separation of components, such as having distinct namespaces and classes for the Database Access Layer (DAL), Business Logic Layer (BLL) and User Interface Layer (UIL). Therefore, tier is about physical separation and units of deployment, and layers are about logical separation and units of design.
. [More]