Which technique is used by Cisco WLCs to minimize the time required on key exchanges during roaming by maintaining a database of clients and keys on behalf of bound APs, and providing those clients and keys to other controllers and bound APs as needed during roaming?

IT Questions Bank › Category: CCNP › Which technique is used by Cisco WLCs to minimize the time required on key exchanges during roaming by maintaining a database of clients and keys on behalf of bound APs, and providing those clients and keys to other controllers and bound APs as needed during roaming?

Cisco Centralized Key Management (CCKM)
intercontroller roaming
key caching
802.11r support

Explanation: Cisco controllers offer three techniques to minimize the time and effort spent on key exchanges during roams:

Cisco Centralized Key Management ( CCKM ): One controller maintains a database of clients and keys on behalf of bound APs and provides the clients and keys to other controllers and bound APs as needed during client roams.
Key caching : Each client maintains a list of keys used with prior AP associations and presents the keys as it roams.
802.11r : This 802.11 amendment addresses fast roaming or fast BSS transition. A client can cache a portion of the key of the authentication server and present that to future APs as it roams.

Exam with this question: Chapters 17 - 19: Wireless Essentials Exam