Most of the time folks find it really difficult to test web services. It is because we don't have proper knowledge of web services. Before any testing it is important to understand the system, we should know what can be the positive and negative sides of the technology and implementations of that application. Lets dive into the depth of web service testing. To provide a better security solution to the web service we should have a brief understanding of web services, their architectural styles, their constraints and their characteristics that are responsible for their strength as well as weakness.