A teacher is explaining uRPF to network students in a classroom. Which two statements are accurate about uRPF operation on a Cisco router? (Choose two.)

Question:

A teacher is explaining uRPF to network students in a classroom. Which two statements are accurate about uRPF operation on a Cisco router? (Choose two.)

• It only works if Cisco Express Forwarding is enabled on a router.
• With uRPF, any packets generated by the router and destined to the router are considered valid by default.
• The feature helps eliminate spoofed IP packets on a network by examining the source IP address of an ingress packet.
• It has two possible operation modes: strict and loose.
• The uRPF feature helps limit spoofed IP packets on a network by examining the source and the destination IP addresses of an ingress packet.

Explanation: Unicast Reverse Path Forwarding (uRPF) helps limit or even eliminate spoofed IP packets on a network. This is accomplished by examining the source IP address of an ingress packet and determining whether the packet is valid. Cisco Express Forwarding must be enabled on the IOS device for uRPF to work. The feature uRPF can operate in three different modes: strict, loose, and VRF. With uRPF, any packets generated by the router and destined to the router are discarded by default.

Exam with this question: CCNP ENARSI 8 Modules 21 - 23 Checkpoint Exam: Infrastructure Security and Management Exam