Final answer:
CCKM is a key management method that facilitates quick re-authentication when a wireless client roams between access points, avoiding the need for a complete 802.1X authentication process with each new connection.
Step-by-step explanation:
The key management method that allows you to roam between access points without having to perform a complete 802.1X authentication process again is CCKM, which stands for Cisco Centralized Key Management. With CCKM, wireless clients can quickly re-authenticate to the network when they roam between access points. This feature is essential in environments where session persistence and quick-handoff are necessary for applications such as voice over WLAN. The use of CCKM reduces latency and improves the user experience during roaming by utilizing cached credentials instead of requiring the client to go through the full authentication cycle with an authentication server each time it connects to a new access point.