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This protocol MUST be supported over UDP and TCP for Internet Protocol version 4 (IPv4)/Internet Protocol version 6 (IPv6) endpoints (2).<1> When running over connectionless protocols such as UDP, each RTP packet MUST be transported in exactly one datagram. The total size of a single RTP packet, including all transport, network, and link-layer headers, MUST NOT exceed 1500 bytes. If the underlying transport is disconnected, or becomes inactive for more than 30 seconds, the RTP session SHOULD<2> be terminated.
This protocol MAY have multiple RTP sessions sharing the same transport. When sharing the same transport, each RTP session MUST use SSRCs in the range specified in [MS-SDPEXT] section 3.1.5.31. These SSRC ranges MUST NOT overlap.
This protocol SHOULD multiplex RTP packets and RTCP packets on one single transport, as described in [RFC5761].