You are validating association capabilities from clients to an 802.1X/EAP secure SSID. The RADIUS server’s IP address is 10.100.50.25 and the default RADIUS authentication port is used. When testing them, none of the clients are able to associate to the SSID. Troubleshooting the WLAN infrastructure, you found out that the server is up and the RADIUS service is up as well, but the authenticator is not able to communicate properly with the server. What’s your next troubleshooting step?