Cisco Compatible EXtensions

The Cisco Compatible eXtensions (CCX) Specification describes a list of functional extensions to the IEEE 802.11 Wireless LAN standard to support fast roaming (CCKM) with upgraded security, reliability, and diagnostic performance. This specification is Cisco proprietary and a device manufacturer requires a Cisco license agreement in order to develop mobile devices with this technology. Currently, CCX versions 4 (CCXv4) and 5 (CCXv5) are supported.