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IP Unicast, Multicast and Broadcast
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A IP broadcast goes to every device on the network, often distributing control data that supports the network.
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In IP multicasting, the data goes only to devices that request it.
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Unicast datagram has defined and unique sender and recipient.
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| 2 |
IP multicasting is a way of forwarding data to a group of host systems simultaneously. It is similar to IP broadcasting except that instead of all hosts receiving the data, only systems which belong to a multicast host group receive the data.
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| 3 |
A multicast host group is a group of systems which have the same Class D
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IP destination address (for example 224.99.0.6);
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Class D covers addresses: 224.0.0.0 - 239.255.255.255
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| 4 |
Multicast must be enabled on hosts and routers
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| 5 |
If multicast is not supported, we have to built a tunnel i.e. encapsulate multicast messages in unicast datagrams
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