A. Aruba offers a buy-back program for controllerless Instant APs, making it cost effective to later deploy controlled APs.

B. The same Aruba APs can be deployed in controllerless Instant mode and then later changed to controlled mode.

C. Aruba uses a cloud subscription-based licensing model for controllerless APs, and these licenses can be upgraded to controller licenses.

D. There is no difference in features and capabilities between a controllerless and controller-based Aruba solution.