Describe architecture and characteristics of Web services.

Web services play a crucial role in modern web applications by enabling communication and data exchange between different systems over the internet. These services follow a set of standards and protocols to ensure interoperability and seamless integration between diverse applications. In the context of web application testing and audit, understanding the architecture and characteristics of web services is essential for ensuring the security, reliability, and performance of web applications that rely on these services.

1. Architecture of Web Services:

1.1. Service-Oriented Architecture (SOA):
Service-Oriented Architecture is a design approach that structures applications as a collection of services, each capable of performing a specific business task. In the context of web services, SOA provides a framework for building scalable and loosely coupled systems. Services within this architecture are independent entities that can be invoked and combined to perform complex functionalities.

1.2. Components of Web Services Architecture:

   - Service Provider: The entity that publishes the web service and makes it available to consumers.
   
   - Service Requestor/Consumer: The application or system that consumes the web service to access its functionality or data.
   
   - Service Registry: A directory or database that contains information about available web services, enabling service discovery.
   
   - Service Description: A document that describes the functionalities and specifications of the web service. Commonly, WSDL (Web Services Description Language) is used for this purpose.
   
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