In the switching network shown in the figure, VLAN10 is set as Isolate-user-vlan on switch SWA, and VLAN2 and VLAN3 are set as Secondary VLAN of VLAN 10; VLAN4 and VLAN20 are created on switch SWB, and VLAN20 is set as Isolate-user-vlan and VLAN4 is set as Secondary VLAN of VLAN20. After setting the IP addresses of each device as shown in the figure, the local proxy ARP function is enabled on SWA and SWB. Initially, the switch and PC did not learn their corresponding ARP entries. When PCA pings PCB, PCA will send an ARP request. After PCB receives the ARP request message, it sends a destination MAC response with the destination MAC address as?

In the switching network shown in the figure, VLAN10 is set as Isolate-user-vlan on switch SWA, and VLAN2 and VLAN3 are set as Secondary VLAN of VLAN 10; VLAN4 and VLAN20 are created on switch SWB, and VLAN20 is set as Isolate-user-vlan and VLAN4 is set as Secondary VLAN of VLAN20. After setting the IP addresses of each device as shown in the figure, the local proxy ARP function is enabled on SWA and SWB. Initially, the switch and PC did not learn their corresponding ARP entries. When PCA pings PCB, PCA will send an ARP request. After PCB receives the ARP request message, it sends a destination MAC response with the destination MAC address as?

A . FFFF.FFFF.FFFF
B . 0011.1111.1111
C . 00E0.FC00.0010
D . 00E0.FC00.0020

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Answer: D