Service Providers

This Layer consists of different business applications. These applications may be packaged (e.g. SAP, Reteck, etc) or may be custom developed in various technologies (e.g. Java, .Net, etc). Again application in this layer may be service enabled or legacy once, which do not expose their functionalities as service.

At this layer EAI exist. Some may argue that SOA is one form of integration then how EAI can exist at this layer. I will discuss this argument in one of my future posting but not now.