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The Advanced Message Queuing Protocol (AMQP) is an open standard application layer protocol for message-oriented application. RabbitMQ is internally built on Erlang which is used for internal memory management of RabbitMQ. It is one of the easiest way of transmitting data between different programming languages (Example C# front-end can interact with Java application.) It is also a way of sending data between programming languages. It's an open-source messaging broker and it is really open source. It's also an easy way of communicating between different languages.