As shown in the figure, when the switch needs to forward the frame with the destination mac address of 5489-98ec-f011, which of the following descriptions is correct?

A . The switch will send a message that the destination is unreachable to the source device
B . The switch does not find a matching entry in the mac address table, so the frame will be discarded
C . The switch needs to send a request to discover the device with the mac address of 5489-98ec-f011
D . The switch will flood the frame on all ports except the port that received the frame

Answer: D