Isäntäyksikkö

Isäntäyksikkö refers to a host unit in computing. It is a system, typically a computer, that provides resources or services to other systems, known as client units or satellite units. The host unit can manage and control the operations of the connected client units. This relationship is common in various computing architectures, including client-server models and older mainframe systems where terminals acted as client units to a central host.

In a client-server model, the isäntäyksikkö, or server, hosts applications, databases, or other shared resources. Client units request these resources or services from the server. The server processes the requests and sends back the requested data or performs the requested action. This allows for centralized management of data and applications, improving efficiency and security.

Historically, isäntäyksikkö was a prominent concept in terminal-based computing. A powerful central computer (the host) would run applications, and multiple simpler terminals (clients) would connect to it, primarily for input and output. The processing was done entirely on the host. While modern computing has shifted towards distributed systems and personal devices, the fundamental concept of a host unit providing services to client units remains relevant in network environments and cloud computing.