The foundation for an ESB
In a service oriented architecture (SOA), an enterprise service bus (ESB) is the connectivity layer that connects and mediates information between service requesters and service providers. These service requesters and providers can include new Web services and existing investments, such as core applications, virtualized as Web services. Your organization needs to deploy its own unique ESB, reflecting how many of your applications conform to common standards and how many have not yet been made into services.

WebSphere MQ, Version 6.0 enables Simple Object Access Protocol (SOAP) interactions to flow over its messaging backbone between Web services requesters and providers. Web services-enabled existing and batch applications can also benefit from using WebSphere MQ in its asynchronous mode as a buffering mechanism to regulate the flow of requests made to these systems. WebSphere MQ provides an optimal transport to add reliability and traceability to your services connecting to the ESB to support your SOA.