PC1 1A-1A-1A-1A-1A-1A Port 12 Port 14 Port 16 S5700 Port 20 PC2 2B-2B-2B-2B-2B-2B PC3 30-3C-30-30-3C-30 PC4 4D-4D-4D-4D-4D-4D Figure 1: A simple LAN configuration Table 1: A switching table Port Number Source MAC Address 12 1A-1A-1A-1A-1A-1A 14 2B-2B-2B-2B-2B-2B 16 3C-3C-3C-3C-3C-3C 20 4D-4D-4D-4D-4D-4D Briefly explain the switch processes based on the following situations. 1) The switch receives a frame at Port 12 with the source address 1A-1A-1A-1A-IA-IA and the destination address 3C-3C-3C-3C-3C-3C. [2 marks] 2) The switch receives a frame at Port 16 with the source address 3C-3C-3C-3C-3C- 3C and the destination address FF-FF-FF-FF-FF-FF. [2 marks] 3) Both computers at Port 16 and Port 20 are sending a frame to destination address 1A-1A-1A-1A-1A-1A at the same time