A switch needs to forward a frame with the destination MAC address 5489-98EC-F011. Refer to the display mac-address command output. Which of the following statements is true?
A.
The switch does not find a matching entry in the MAC address table, so it discards the frame.
B.
The switch needs to send a request to discover the device whose MAC address is 5489-98EC-F011.
C.
The switch floods the frame on all interfaces except the one on which it received the frame.
D.
The switch sends an ICMP unreachable message to the source device.
The MAC address table does not contain an entry for 5489-98EC-F011.
When a switch receives a frame with an unknown destination MAC address, it performs flooding.
Flooding sends the frame out of all interfaces except the one it was received on.
A (Incorrect): The switch does not discard unknown frames; it floods them.
B (Incorrect): No request is sent; flooding occurs instead.
D (Incorrect): ICMP is used for network-layer (IP) communication, not Ethernet switching.
Thus, the correct answer is C (Floods the frame on all interfaces except the incoming one).
[Reference: HCIA-Datacom Study Guide, MAC Address Learning & Forwarding Section., , ]
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