What is RTP and why not TCP?

• RTP is the Real-time Transport Protocol

  • Supports real-time Audio/Video scaling to 1000's

  • Provides sequencing, timestamping, media identification

  • Used with UDP to get port multiplexing and checksum

  • Companion RTCP provides reception quality feedback

• Alternative to TCP:

  • TCP accepts delay to ensure reliable delivery

  • RTP accepts some packet loss to get low delay

  • RTP/UDP works with IP Multicast, TCP is point-to-point

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