An engineer is implementing RADIUS to restrict administrative control to the network with the WLC...

For RADIUS to restrict administrative control effectively, the engineer needs to define a Network Access Server (NAS) entry that corresponds to the WLC’s management IP address and the AP subnet. The correct entry would be the NAS IP of the virtual interface (typically used for RADIUS communications) and the specific network range of the AP subnet, which is 192.168.2.0 with a subnet mask of 255.255.255.0. References: CCNP Enterprise Wireless Design ENWLSD 300-425 and Implementation ENWLSI 300-430 Official Cert Guide.