There are two types of JMS Messaging systems. They are

1. Point to Point Messaging

2. Publish Subscribe Messaging

Queue: A queue is a temperory storage of a message used

when working with Point 2 Point Messaging

Topic: A topic is also a temperory storage of a message

used when working with Publish Subscribe Messaging

In Queues, they are connected directly to another queue to

transfer the messages.

In Topics, the subscribers need to subscribe to the topics

to pick up the messages published by the publishers.