- Push - Authenticate through the DUO app on your phone or tablet. You will receive a message to allow the authentication which you can accept.
- Phone - DUO will call a number you enter. Once you receive the phone call you can allow authentication.
- Passcode - Use the DUO app to generate a passcode which can be entered into DUO to allow authentication. No cell service is needed for this which is useful when traveling overseas.