Unicast and multicast transmissions are two methods in which video is commonly streamed over a network, from the camera to its destination. Each video transmission method comes with its own pros and cons, and every installation’s functional requirements will dictate which transmission is best. In general, unicast streaming is the most common way to stream network video. Each client requests one media stream. This transmission ensures that all network packets are delivered to the client.
Multicast streaming broadcasts packets and allows multiple clients to view the same video stream. This is a more effective scheme when multiple clients view the same video stream. Multicast does not ensure that all clients will get all the packets due to network disruption. For video streams the impact may be very limited, often unnoticeable. The network infrastructure and system usage dictate which scheme to use.
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