Unicast Reverse Path Forwarding definition:
A. Pending
B. Other
Correct Answer: A
Explanation/Reference:
Unicast Reverse Path Forwarding
Unicast Reverse Path Forwarding (uRPF) can mitigate spoofed IP packets. When this feature is enabled on an interface, as packets enter that interface the router spends an extra moment considering the source address of the packet. It then considers its own routing table, and if the routing table does not agree that the interface that just received this packet is also the best egress interface to use for forwarding to the source address of the packet, it then denies the packet.
Explanation/Reference:
Unicast Reverse Path Forwarding
Unicast Reverse Path Forwarding (uRPF) can mitigate spoofed IP packets. When this feature is enabled on an interface, as packets enter that interface the router spends an extra moment considering the source address of the packet. It then considers its own routing table, and if the routing table does not agree that the interface that just received this packet is also the best egress interface to use for forwarding to the source address of the packet, it then denies the packet.
Q. Which Cisco feature can help mitigate spoofing attacks by verifying symmetry of the traffic path?
A. Unicast Reverse Path Forwarding