Final answer:
The most common client/server processing architecture in current use is the host-based architecture, where the server performs the majority of the work, managing data, resources, and returning results, while the client provides the user interface.
Step-by-step explanation:
The client/server processing architecture that is most common in current use is the host-based architecture. In a host-based architecture, the server performs almost all of the work. It processes the data, manages the resources, and provides the results back to the client. The client's role is primarily to provide a user interface. Modern systems, however, have evolved to use more balanced approaches where the workload is distributed more evenly between the client and server.
In this architecture, the client (such as a computer or mobile device) requests services or resources from a server, which then processes the request and sends a response back to the client. This approach allows for efficient distribution of processing tasks between the client and server, providing a scalable and reliable system.