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

IKE (Internet Key Exchange):IKE is a protocol used to set up a security association (SA) in the IPsec protocol suite. It is utilized to negotiate, create, and manage SAs.

NAT-T (Network Address Translation-Traversal):NAT-T is used to enable IPsec VPN traffic to pass through NAT devices. It encapsulates IPsec ESP packets into UDP packets.

Transport Protocol:Both IKE and IKE NAT-T use UDP as their transport protocol.

Port Numbers:By default, IKE uses UDP port 500. NAT-T typically uses UDP port 4500. However, these port numbers can be configured as needed.

References:

Fortinet Network Security Support Engineer Study Guide for FortiOS 7.2​(Fortinet Docs)​​(ebin.pub)​.

Fortinet Documentation on IPsec VPN Configuration​(Fortinet Docs)​.