<!-- loio9bcbf3b1cb0f4a66bc717ef69b67f1bc -->
# Message Exchange Patterns
Know the different message exchange patterns.
Most messaging applications use the following messaging exchange patterns:
- Publish–subscribe
- Point-to-point
- Request reply
Most events use the publish-subscribe pattern.
<a name="loio9bcbf3b1cb0f4a66bc717ef69b67f1bc__section_brf_dgh_hbc"/>
## Publish–Subscribe
In a publish-subscribe exchange pattern, messages sent by the producer \(publisher\) can be processed multiple times by different consumers \(subscribers\). Each consumer receives its own copy of the message for processing.
<a name="loio9bcbf3b1cb0f4a66bc717ef69b67f1bc__section_fmm_ggh_hbc"/>
## Point-to-Point
In a point-to-point exchange pattern, messages sent by the producer are processed by a single consumer.
<a name="loio9bcbf3b1cb0f4a66bc717ef69b67f1bc__section_bf2_ngh_hbc"/>
## Request Reply
In a request reply exchange pattern, applications achieve two-way communication using separate point-to-point channels: one for requests, and another for replies.
