In __________ type of distributed systems, the nodes play an important role in…

The correct answer is Option C, peer-to-peer system. In a peer-to-peer (P2P) distributed architecture, every node functions as both a client and a server. Unlike traditional models where specific machines handle requests for others, P2P systems rely on the collective resources of all participating nodes. This means that tasks and data are distributed evenly across the network, with each node playing an equally important role in processing requests and sharing resources. This contrasts sharply with a file server system (Option B), where a central server manages files and clients merely request them, creating an imbalance in roles. Similarly, a computer server system (Option A) typically implies a client-server model where the server is dominant. Middleware (Option D) refers to software that connects different applications rather than a structural system type itself. Therefore, the description of nodes playing an important role with evenly distributed tasks perfectly defines a peer-to-peer system.