.. _DDS_WireProtocolQosPolicy: ../../../api_c/html/structDDS__WireProtocolQosPolicy.html
.. _rtps_well_known_ports: ../../../api_c/html/structDDS__WireProtocolQosPolicy.html
Transport Port Number
---------------------
The port number of a locator is not directly configurable. Rather,
it is configured indirectly by the DDS_WireProtocolQosPolicy_
(rtps_well_known_ports_) of the *DomainParticipant's* QoS, where a
well-known, interoperable RTPS port number is assigned.