What is the difference between Point to Point and Publish/Subscribe Messaging Domains

A point-to-point (PTP) product or application is built around the concept of message queues, senders, and receivers. Each message is addressed to a specific queue, and receiving clients extract messages from the queue(s) established to hold their messages. Queues retain all messages sent to them until the messages are consumed or until the messages expire:In point to point messaging model has Message Queue, senders and receivers.
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