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.
Which protocol is commonly used for IoT devices?
Which protocol is ActiveMQ's own native wire format?
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