Messages are saved in the precise sequence in which they were transmitted and remain in the queue until the receipt is verified.
Another difference comes from the fact that P2P messaging requires the sender application to know the address of the receiver application.
In more accurate terms, a Message Queuing System is a communication service that decouples the act of sending a message from the act of receiving that message.
Messages received from the sender are stored using a temporary buffer (Queue) until the receiver is able to receive and process the messages.
This type of communication is called Asynchronous Communication, where the sender and receiver applications can communicate without having to be online or available at the same time.
In such systems, the sender does not have to wait for a response from the receiver and, therefore, can proceed with other tasks.
A Message Broker can perform a range of operations on data like validation, transformation, aggregation, decomposition, rerouting, storage, and guaranteed delivery.
Message Queues can easily manage data spikes, ensuring that the data is persisted and handled, if not immediately, then later.
In P2P, the sender and receiver applications have no timing dependencies.
the receiver acknowledges the successful processing of a message to the Message Queue so that it can be removed from the queue.
A Publish/Subscribe messaging model, also pronounced Pub/Sub, delivers messages to all subscribers that are subscribed to that Topic.
Topics are essentially entities that contain the message and additional details like publisher and subscriber information.
This characteristic provides high decoupling for applications.
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