broker

A serverA computer with a dedicated purpose. Older familiar examples are print servers (a computer that controls local printing) and file servers (a computer used for storing files centrally). More modern examples are web servers (the computers that handle your web requests when you use your browser) or application servers (computers dedicated to handling the computing needs of a specific application). Servers are often powerful, expensive machines since they have to handle a heavy load. that manages published data and subscribers to that data as part of a publish-and-subscribeA way of sending data to multiple destinations. The destinations subscribe to the data using a broker; whatever is generating the data (possibly a sensor) publishes the data to the broker; the broker either sends to the data to the subscribers or lets the subscribers request data. setup.