ABSTRACT
Real-time data can be transported efficiently by providing a means for reporting the performance of data transfer in the network. The Real Time Control Protocol (RTCP) was proposed for this purpose and is therefore used to report or give feedback on the quality of data distribution. It also is used to provide a persistent transport-level identification for RTP sources. That is, participants in an RTP session are identified with RTCP and may contain more information on participants, such as their e-mail addresses. It provides automatic adjustment of control overhead. Finally, it also provides control information required for maintaining high-quality, efficient real-time sessions.
