The broker eliminates these complexities from the equation: each node can be totally independent and can communicate with an undefined number of peers without directly knowing their details. A broker can also act as a bridge between the different communication protocols, for example, the popular RabbitMQ broker (http://www.rabbitmq.com) supports Advanced Message Queuing Protocol (AMQP), Message Queue Telemetry Transport (MQTT), and Simple/Streaming Text Orientated Messaging Protocol (STOMP), enabling multiple applications supporting different messaging protocols to interact.
