What statements describe industry practices for communication protocols between WLAN
controllers and controller-based APs? (Choose two)

A.
All vendors use the same protocol so that APs will interoperate with WLAN controllers from
other vendors.

B.
Some vendors use proprietary protocols, and some vendors use protocols based on public
standards like RFCs.

C.
For most vendors, the controller-based APs maintain data and control tunnels with at least two
controllers for immediate failover and redundancy.

D.
All vendors support at least one L2 or L3 broadcast protocol for controller discovery by
controller-based APs.

E.
All vendors recommend using L2 (instead of L3) controller discovery and tunneling protocols in
large enterprises.