An engineer must implement WLC features that enhance roaming. Which two technologies fulfill this requirement? (Choose two.)

Cisco Centralized Key Management (CCKM) is a Cisco proprietary fast roaming mechanism that allows clients to roam quickly by caching credentials at the WLC, eliminating the need for a full re-authentication on each roam.

802.11v provides BSS Transition Management to recommend roaming candidates to clients, but it does not accelerate the authentication process itself.

802.11r (Fast BSS Transition) is an IEEE standard that pre-authenticates clients to the target AP before the roam occurs, drastically reducing handoff latency and improving roaming performance.

802.1X is a port-based Network Access Control framework used for initial authentication, not for reducing roaming latency between APs.

WPA2 is a security certification based on 802.11i that defines encryption and authentication standards but provides no mechanism to enhance or accelerate roaming.