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== Protocol functions ==
Typically RTP will be sent on an even-numbered [[User Datagram Protocol|UDP]] port, with RTCP messages being sent over the next higher odd-numbered port.
RTCP itself does not provide any flow encryption or authentication methods. Such mechanisms may be implemented, for example, with the [[Secure Real-time Transport Protocol]] (SRTP)
RTCP provides basic functions expected to be implemented in all RTP sessions:
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