Full multicast, IPTV end to end delivery platform

Full multicast, IPTV end to end delivery platform

Multicast vs Unicast
Multicast vs Unicast

ROUTER

HOST

ROUTER

HOST

UNICAST

MULTICAST

Unicast and multicast are two distinct forms of streaming media distribution. Each has unique strengths and weaknesses based on the nature of your audience and the type of content.

 

Unicast

 

A unicast stream is a one-to-one connection between the server and a client, which means that each client receives a distinct stream and only those clients that request the stream receive it. You can deliver content as a unicast stream from either an on-demand or a broadcast point.

 

Middleware Servers

 

Multicast streaming is a one-to-many relationship between a DISTRO server and the clients receiving the stream. With a multicast stream, the server streams to a multicast IP address on the network, and clients receive the stream by subscribing to that address. All clients receive the same stream. Because there is only one stream from the server regardless of the number of clients receiving the stream, a multicast stream requires the same amount of bandwidth as a single unicast stream containing the same content. Using a multicast stream preserves network bandwidth and can be used for low bandwidth local area networks.

 

Content can be delivered as a multicast stream only from a broadcast publishing point. In addition, network routers must be multicast-enabled, meaning they can transmit class-D IP addresses. If network routers are not multicast-enabled, content can still delivered as a multicast stream over the local segment of a local area network.

 

All multicast content must have a specified time-to-live (TTL) value that limits the number of routers that the multicast can traverse before it expires.

 

Multicast streams are much less demanding on the server and network but may require network modification for multicasts and regular network traffic to coexist effectively. Consider using multicast streaming if:

Content is being broadcast to a large audience, while network bandwidth and server capacity are limited.

 

The network is multicast-enabled.

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