DRAG DROP - Drag and drop the Cisco Wireless LAN Controller security settings from the left onto the correct security mechanism categories on the right. Select and Place: 

Layer 2 Security Mechanism includes WPA+WPA2, 802.1X, Static WEP, CKIP while Layer 3 Security Mechanisms (for WLAN) includes IPSec, VPN Pass- Through, Web Passthrough ¦ Reference: https://www.cisco.com/c/en/us/support/docs/wireless/4400-series-wireless-lan-controllers/106082-wlc-compatibility-matrix.html