However TCP is definitely more firewall friendly as some networks will block UDP video. UDP is most suitable for networks with very little packet loss and bandwidth that is guaranteed through QOS mechanisms.

MPEG-4 video is typically transmitted over UDP or RTP or RTSP. UDP does not guarantee delivery and provides no facility for retransmission of lost packets. UDP transport provides the option of IP Multicast (IPmc) delivery, where a single stream is generated by the camera may be received by multiple endpoints, the Media Servers.

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