Explanation:

In a typical client-server network, the **Network server** is the most important and powerful computer. It provides centralized services, resources, and data to client machines, often possessing greater processing power, memory, and storage to manage network operations efficiently. * **Option A (Desktop):** A desktop computer is typically a client, used by an individual, and not the central powerful component of a network. * **Option B (Network client):** A network client requests services from a server and is generally less powerful in terms of network-wide functionality. * **Option C (Network server):** This is the correct answer. Servers are designed to be powerful and central to network operations, managing and providing resources. * **Option D (Network station):** This is a general term for any computer on a network and does not specifically denote the most powerful or important one.