Which IKEv2 feature minimizes the configuration of a FlexVPN on Cisco IOS devices?

IKEv2 Suite-B defines a set of NSA-approved cryptographic algorithms for classified environments and is a specific algorithm suite - it does not reduce overall FlexVPN configuration complexity.

IKEv2 proposals define specific encryption and integrity algorithm combinations but must still be explicitly configured, so they do not inherently minimize the overall deployment configuration.

IKEv2 profiles bind authentication and IKEv2 policy together for a tunnel but require manual definition and do not automatically reduce the FlexVPN configuration burden on their own.

IKEv2 Smart Defaults is a Cisco IOS feature that pre-defines default values for IKEv2 proposals, policies, and profiles, allowing a FlexVPN solution to be brought up with minimal explicit configuration. Administrators do not need to manually define every cryptographic or authentication parameter because the smart defaults supply compliant values automatically.