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Refer to the exhibit below. PC4 sends a frame to PC1. How will the switch _SW1 process the frame?
Send the frame back to PC4.
Send an ARP request to find PC1.
Discard the frame.
Send the frame out to all ports except F0/4.
Send an ICMP Host Unreachable Message back PC4.
Send the frame through port Fa0/1 and update the MAC address table.
The two main functions of a switch are to flood or forward frames and to populate its MAC address table with MAC addresses and interfaces. When a frame enters the switch and the destination MAC addresses is unknown for the switch's MAC address table, the Switch will flood or forward copies of the frame out all ports, except the port on which the frame was received in this case Fa0/4. On the other end, the unknown device receives the frame and sends a reply. The switch will build a correct MAC table entry for the unknown device based on its source MAC address. In this scenario, the only unknown port in the table is F0/1 which is immediately recorded with the MAC address as soon as it receives a frame on that port. The switch proceeds to forward the frame to the destination address, because now the MAC address table is populated to all connected PCs.
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