Basiert sich auf TCP/IP, aber es existiert auch UDP Variante.

MQTT ist eine alternative für HTTP

MQTT ist statefull

MQTT follows the Publish/Subscribe paradigm .The sender (Publisher) and receiver (Subscribers) of messages communicate via so-called topics and are decoupled from each other. The connection between them is handled by the broker.

The task of the broker is to filter all incoming messages and distribute them correctly to the subscribers. A client doesn’t have to pull the information it needs, the broker pushes the information to the client whenever something new is available.