Subdomain 1.1: Secure access to resources by using Microsoft Entra ID
1.A high-security team wants employees to sign in without ever typing a password, using a method resistant to remote phishing, and the credential must be tied to a physical hardware device the user carries. Which authentication method should be deployed?
- A.Microsoft Authenticator push notifications used for MFA
- B.FIDO2 security keys as a passwordless primary sign-in method
- C.SMS-based one-time passcodes for secondary authentication
- D.Temporary Access Pass for onboarding new employees
Show answer & explanation
Correct answer: B — FIDO2 security keys as a passwordless primary sign-in method
- A. Push notifications through Microsoft Authenticator serve as a secondary MFA factor and still require a password for primary sign-in, so they do not remove passwords or use a physical hardware key.
- B. FIDO2 security keys are a phishing-resistant, passwordless primary authentication method bound to a physical hardware device, which matches the requirement for hardware-backed, passwordless sign-in.
- C. SMS one-time passcodes are a secondary authentication factor delivered over a phone network and are not phishing-resistant, so they do not meet the hardware-bound, phishing-resistant requirement.
- D. A Temporary Access Pass is a time-limited passcode meant for onboarding or recovery scenarios, not a permanent hardware-bound passwordless credential for daily sign-in.