Port :7402RTPS DDS Meta-Traffic

The Real Time Publish Subscribe (RTPS) protocol, standardized by the Object Management Group (OMG), provides an interoperable wire protocol that underpins implementations of the DDS architecture. Port 7402 is specifically reserved for DDS meta-traffic, which includes participant discovery, endpoint discovery, liveliness assertions, and maintaining QoS compatibility checks. This communication is essential for building a dynamic data infrastructure where publishers and subscribers can find each other and communicate in real time.

Meta-traffic via RTPS is generally exchanged using both TCP and UDP transports on port 7402 to ensure discovery and control operations function efficiently across varied network conditions. It supports reliable as well as best-effort communication modes, enabling robust messaging even in unreliable or bandwidth-constrained environments. The use of meta-traffic is distinct from user-data traffic, which typically occurs on separate dynamically assigned ports configured during session setup.

RTPS traffic is heavily utilized in distributed industrial control, autonomous vehicles, robotics, telecommunications, military systems, and IoT implementations where low latency and high reliability are critical. The protocol design emphasizes extensibility and interoperability, supporting complex data types, advanced QoS policies, and security extensions where enabled.