Which of the following is not considered a form of distributed processing?

The client-server model is a classic form of distributed processing where clients request services from a central server.

Peer-to-peer (P2P) architecture is a distributed processing model where each node can function as both a client and a server, distributing workload.

Ubiquitous pervasive computing describes an environment where computing devices are seamlessly integrated into everyday objects and activities, providing computing power everywhere, but it is a computing paradigm or concept, not a specific architecture or form of distributed processing itself.

Service-oriented architecture (SOA) is an architectural style that structures an application as a collection of loosely coupled services, which is inherently a form of distributed processing.