ISO/IEC 16512-1:2005 addresses the basic concepts needed to specify RMCP for relayed multicast. It defines the related terminology and proposes a framework for the future development of RMCP. The framework covers network topology including network entities and relationships between them, service scenarios, basic operations, and message encoding rules. RMCP is a protocol which is used to realize a relayed multicast data transport scheme. Differently from the conventional IP multicast, RMCP can configure a relayed multicast path that multicast traffic flows by using intermediate end-hosts. RMCP can be applied to the current unicast-based Internet where IP multicast has not been deployed completely without any modifications.