When forwarding a multicast frame, the normal behavior for a LAN switch with IGMP snooping enabled is to forward the frame based on the similar rules as if it were:

When forwarding a multicast frame, the normal behavior for a LAN switch with IGMP snooping enabled is to forward the frame based on the similar rules as if it were:
A .  A unicast frame with a known destination in the forwarding table
B .  A unicast frame with an unknown destination in the forwarding table
C .  A unicast frame with a known source in the forwarding table
D .  A unicast frame with an unknown source in the forwarding table

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Answer: A