A network engineer is configuring high availability on an access point. What is the maximum number of controllers that can be configured?

One controller provides no redundancy and does not constitute a high availability configuration.

Two controllers covers only primary and secondary assignments, but Cisco APs support a third tertiary controller for additional redundancy.

A Cisco access point can be configured with a primary, secondary, and tertiary controller, giving a maximum of three controllers for high availability failover. This ensures the AP can rejoin the network even if the primary or secondary controller becomes unavailable, providing layered redundancy.

Four controllers is not supported - the AP high availability model is limited to three controller assignments: primary, secondary, and tertiary.