A technician is implementing multifactor authentication for a high-security organization Which of the following physical security technologies should the technician propose for implementation?…

Strong passwords are a 'something you know' factor and represent single-factor authentication on their own; they are not a physical security technology.

A fingerprint reader is a biometric authenticator representing the 'something you are' MFA factor, making it a physical security technology that directly contributes to multifactor authentication.

Mantraps are physical access control barriers that restrict building entry but do not function as authentication factors for logging into systems or applications.

A smart card is a physical token representing the 'something you have' MFA factor, and combined with a PIN or biometric creates a valid multifactor authentication scheme for high-security environments.

Cable locks are physical theft-deterrent devices that secure hardware to a surface; they do not authenticate users and play no role in MFA.

Privacy filters are screen overlays that prevent visual eavesdropping; they are a passive security measure and not an authentication factor.