ISO/IEC 14476-4:2010 provides a specification of QoS management for accomplishing desirable QoS for a duplex multicast transport connection. For this purpose, it describes the QoS management operations in duplex multicast transport connection such as QoS negotiation, QoS monitoring and QoS maintenance. ISO/IEC 14476-4:2010 is an integral part of ECTP-3 (ITU-T Rec. X.607 | ISO/IEC 14476-3). All of the protocol components, including packet formats and protocol procedures specified in ITU-T Rec. X.607 | ISO/IEC 14476-3 are also valid in ISO/IEC 14476-4:2010.