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Which statement about this design is true if URPF in strict mode is configured on both interfaces?

Refer to the exhibit.

R1 is connected to two service providers and is under a DDoS attack.

Which statement about this design is true if URPF in strict mode is configured on both interfaces?
A . R1 drops all traffic that ingresses either interface that has a FIB entry that exits a different interface.
B . R1 drops destination addresses that are routed to a null interface on the router.
C . R1 permits asymmetric routing as long as the AS-PATH attribute entry matches the connected A
E . R1 accepts source addresses on interface gigabitethernet0/1 that are private addresses.

Answer: A

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