Integration / ActiveMQ Interview Questions Basics
What are the transport protocols supported by ActiveMQ?
ActiveMQ supports several wire protocols depending on client type and use case:
| Protocol | Typical Use |
| OpenWire | Native, high-performance Java clients |
| STOMP | Simple text-based, cross-language messaging |
| MQTT | Lightweight IoT and mobile devices |
| AMQP | Interoperability with other brokers |
| REST / WS | HTTP-based access |
A single broker instance can expose several of these transports simultaneously, each on its own port, so a Java service can connect over OpenWire while an IoT device connects to the same broker over MQTT. Choosing a protocol is mostly about the client ecosystem: use OpenWire for Java-to-Java traffic where performance matters most, and reach for STOMP, MQTT, or AMQP when clients are written in other languages or run on constrained hardware.
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