RTP Control Protocol
The Real Time Control Protocol ( RTCP ) is used for negotiation and compliance with quality-of- service parameters (QoS ) by the periodic exchange of control messages between transmitter and receiver. For that purpose a
The Real Time Control Protocol together with the Real-Time Streaming Protocol ( RTSP), which is responsible for controlling the transmission, and the Real-Time Transport Protocol ( RTP ) is used, which handles the actual transmission.