A network engineer is mitigating a recent DoS attack on a multihomed environment with asymmetric routing. Which two actions must be taken to mitigate this type of DoS attack?
(Choose two.)
A. Enable ingress infrastructure access lists on the distribution switches.
B. Enforce inbound filtering policies on the border network devices.
C. Enable a loose uRPF check on the border routers.
D. Enable a strict uRPF check on the border routers.
E. Install Cisco Intrusion Detection Systems on the ISP links.
