CMFD Engineer Practice Exam 2026 - Free Practice Questions and Study Guide

Signing out means ending your current session securely so others cannot access the system. A proper sign-out flow typically includes actions that confirm or record the end of your shift: you might notify dispatch so they’re aware you’re leaving, you click the sign-out option to terminate the session, and, if required by policy, you re-enter your unit ID and password to confirm the sign-out. Signing on without authentication, on the other hand, is about starting or resuming access without proving who you are, which undermines security and has no place in signing out. So the action that is not a valid sign-out action is signing on without authentication.