Connection broker

In software engineering, a connection broker is a resource manager that manages a pool of connections to connection-based resources such as databases or remote desktops, enabling rapid reuse of these connections by short-lived processes without the overhead of setting up a new connection each time.
Connection brokers are often used in systems using N-tier architectures.
 A remote desktop connection broker is software that allows clients to access various types of server-hosted desktops and applications. In hosted desktop environments, the remote desktop connection broker is the “middle” component, in-between the desktops in the data center (hosted virtual machines, shared , and blades) and the clients that are used to access the desktops (thin clients, soft clients, and mobile devices, among others).
Remote desktop connection brokers perform a variety of tasks, including: