Extensible Authentication Protocol

one-time passwords (OTP) per RFC 2289

• Supplicant: The 802.1X driver that supplies a username/password prompt to the user and
  sends/receives the EAPoL messages
• Authenticator: Translates between EAPoL and RADIUS messages in both directions, and
  enables/disables ports based on the success/failure of authentication
• Authentication server: Stores usernames/passwords and verifies that the correct values were submitted before authenticating the user