A. N+1 redundancy configuration uses Layer 3 intercontroller roaming, maintaining traffic on the same subnet for more efficiency.

B. N+N redundancy configuration allows logically grouping access points on controllers to minimize intercontroller roaming events.

C. N+N+1 redundancy configuration has the least impact to system management because all of the controllers are colocated in an NOC or data center.

D. Dynamic load balancing, or salt-and-pepper access point design, avoids the potential impact of oversubscription on aggregate network performance.