Explain what a component responsible for mediating between message senders and receivers in the system is.

The component responsible for mediating between message senders and receivers in the system is called a message broker. It receives messages from senders, stores them, and delivers them to receivers, ensuring asynchronous and reliable communication between different parts of the system. Examples of such brokers include RabbitMQ, Apache Kafka, ActiveMQ.

The broker helps unload senders and receivers, provides buffering, message routing, and can support various exchange models, such as queues or publish-subscribe.