What is Service Bus? The Windows Azure Service Bus provides a secured infrastructure for wide-spread communication. It provides the connectivity options for Windows Communication Foundation and other service points. This post explains various tools around Service Bus like the most fundamental is how to create a namespace and how to create entities and how these work through the windows azure new portal. To use service bus or any of the features that it provides then you need to have the namespace. Name space is very similar to web site or IIS site or database in SQL server which gives a scope to contain the entities.