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RTP:
This is the protocol that carries voice packets.

RTCP:

It’s a manager protocol for RTP that can provide information about the quality of a call.

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Posted by sagitraz

RTP is real time transport protocol:

The aim of RTP is to provide a uniform means of transmitting data subject to real time constraints over IP (audio, video, etc. ). The principal role of RTP is to implement the sequence numbers of IP packets to reform voice or video information even if the underlying network changes the order of the packets.

More generally, RTP makes it possible to:

1. identify the type of information carried,
2. add temporary markers and sequence numbers to the information carried,
3. monitor the packets' arrival at the destination.

In addition, RTP may be conveyed by multicast packets in order to route conversations to multiple recipients.

RTCP is real time transport control protocol:

RTCP protocol is based on periodic transmissions of control packets by all participants in the session.

It is a control protocol for RTP flow, making it possible to convey basic information on the participants of a session and the quality of service.

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Posted by HamidAliKhan

RTP is Real Time Protocol
RTCP is the cotroler of RTP and use with RTP.

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Posted by waqqas1