I'm studying CCNP Switching and am hung-up on a part of multicast.
Multicast works by a client sending a membership report that it wants to
join a particular multicast group.
I do not understand how the client knows about the existence of any
particular group or what it's multicast address would be, or what
application/service the client will receive as a part of that group.
How does a client know enough about the group to want to join the group.
I understand the layer 3 and layer 2 of it all, but I'm having a
disconnect as to how it all interacts with the higher levels of the
stack.
Thank You,
Mike B.
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