When configuring a wireless network for dynamic VLAN allocation, which three IETF attributes must be

When configuring a wireless network for dynamic VLAN allocation, which three IETF attributes must be supplied by the radius server? (Choose three.)

A. 81 Tunnel-Private-Group-ID

B. 65 Tunnel-Medium-Type

C. 83 Tunnel-Preference

D. 58 Egress-VLAN-Name

E. 64 Tunnel-Type

Explanation:
The RADIUS user attributes used for the VLAN ID assignment are:

• IETF 64 (Tunnel Type)—Set this to VLAN.
• IETF 65 (Tunnel Medium Type)—Set this to 802
• IETF 81 (Tunnel Private Group ID)—Set this to VLAN ID.

Reference: https://www.cisco.com/c/en/us/support/docs/wireless-mobility/wireless-vlan/71683-dynamicvlan-config.html