Which of the following processing methods are TRUE, to solve the packet congestion on the tunnel? (Multiple Choice)

Which of the following processing methods are TRUE, to solve the packet congestion on the tunnel? (Multiple Choice)
A . The HAC at the tunnel ingress discards unknown unicast packets.
B . The HAC discards broadcast or multicast ARP, ND, DHCP, and mDNS packets to prevent loops.
C . After broadcast/multicast packets are transparently transmitted to the FAC, the FAC converts the packets to unicast packets and forwards the packets over a specific tunnel based on the home AP connected to it.
D . The FAP discards unknown unicast packets and forwards other packets to roaming STAs.

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Answer: AC