We already saw that in SOA communications drive by Enterprise Service Bus — ESB systems. They performs integrations between applications, handles connectivity and messaging, performs routing, converts communication protocols and potentially manages the composition of multiple requests.

So what is the technology that communication handle for each components in SOA ?

First of all, we should say that communication will be the inter-service communication because SOA components are distributed. And these inter-service communication handle by SOAP-based web services.