When forwarding a multicast frame, normal behavior for a LAN switch (without IGMP snooping enabled) is to forward the frame 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

Question

Quizplus · Accepted Answer

Without IGMP snooping, a LAN switch treats multicast frames like broadcast frames, forwarding them out all ports except the one it was received on, similar to how it handles unicast frames with unknown destinations.

When Forwarding a Multicast Frame, Normal Behavior for a LAN