New answers tagged multicast
2
ARP as described above is an excellent example of Broadcast messaging but I see that there really weren't many clear examples of multicast. I know this is an ancient thread but thought I would add a little more color for anyone that runs across it.
There are many different areas where multicast is crucial for.
Network and application control traffic: The ...
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"Flooding" means LSA is sent to all routers in the area (not just the given network), whereas multicasting means the OSPF pkt (with LSA in it) is listened to by all OSPF routers on the given network (not the the whole area).
Unicasting would require more packets, so it would be less efficient. (224.0.0.9 is for RIPv2 BTW, not OSPF; "all OSPF ...
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