Poorly worded question.
What types of traffic will a switch flood out all ports?
Broadcast and multicast frames, as well as unicast frames to unknown destinations, are normally flooded to all ports in a basic switch, and all of this traffic will circulate in such a loop.
Flooding means that the switch sends the incoming frame to all occupied and active ports (except for the one from which it was received). In essence, flooding is when a switch pretends to be a hub.
since there is no option to select a broadcast or multicast it can only be assumes that Cisco is referring to option b as no other option can create a "flooding"
B is correct because it happens during an ARP request for IPv4 and ICMPv6 ND for IPv6 because the Switch doesn't know what network had the MAC Address assigned yet
The correct answer is B.
Switches tend to flood frame with the Unknown Destination MAC Address out all ports apart from the Originating (apart from the one it received) port.
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