This object holds the encrypted authentication-type selector for the RADIUS client, decoding to an Integer32 enumeration currently defined as mac(1) for MAC-address authentication or eapol(2) for EAPOL (802.1X) authentication. It allows a management station to securely switch which authentication method the client uses, an important operational choice since MAC-based and EAPOL-based authentication have very different deployment implications, and the MIB notes the enumeration list is subject to change. An admin migrating a port from MAC-authentication to full 802.1X could encrypt and set this object from mac(1) to eapol(2) to require client supplicants to authenticate.