A. LLDP can be used to query the type of device that is attempting to access the network, and predefined device types can be allowed to bypass the captive portal process.

B. A MAC address white list can be configured on the switch to allow specific MAC addresses to bypass the captive portal process.

C. Captive portal can be configured to only prompt for credentials when HTTP or HTTPS traffic is requested on a port to allow on-HTTP enabled devices access to the network.

D. Authentication credentials for specific devices can be preconfigured on the switch for automatic authentication.