Which statement about IKE and IKE NAT-T is true?

Which statement about IKE and IKE NAT-T is true?
A . IKE is used to encapsulate ESP traffic in some situations, and IKE NAT-T is used only when the local FortiGate is using NAT on the IPsec interface.
B. IKE is the standard implementation for IKEv1 and IKE NAT-T is an extension added in IKEv2.
C. They both use UDP as their transport protocol and the port number is configurable.
D. They each use their own IP protocol number.

View Answer

Answer: C

Explanation:

IKE without NAT-T runs over UDP port 500. IKE with NAT-T runs over UDP port 4500. It can be configurable – https://docs.fortinet.com/document/fortigate/7.0.0/new-features/33578/configurable-ike-port