What action does a switch take if the destination MAC address is unknown?
A.
Discard frame
B.
Send ICMP unreachable message to source
C.
Flood packet on all ports
D.
Compare destination IP address against an ACL to determine if it is permitted
E.
Send gratuitous ARP on all ports and wait for reply before forwarding
Explanation:
“What happens though when the switch receives a frame with a destination MAC address that is
not included in the table? In that case the switch will just broadcast/flood the frame with the
unknown destination address to all of its ports (apart from the port where the frame came from).
This process is called unknown unicast flooding. “
http://telconotes.wordpress.com/2013/03/09/how-a-switch-works/
C. Flood packet on all ports
Packets are layer 3 Data, it suppose to be frames.
“Flood Frame on all ports”
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Also, it won’t flood it on the port it was received upon. So, technically, none of the answers are right.
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