You need to implement a technology that can prevent IP spoofing. Which of the following would do this?

A. DNSSEC
B. unicast reverse path forwarding
C. private VLANs
D. port security


B
Explanation: When enabled, unicast reverse path forwarding allows a router to verify the reachability of the source address in packets being forwarded. If the router cannot find a path back to the IP address in its routing table using the interface on which it arrived, it knows spoofing is in operation and it drops the packet.

Computer Science & Information Technology

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