Which authentication mechanism uses a smart card to operate an entry system?

Which authentication mechanism uses a smart card to operate an entry system?

• A. Access badges
• B. Password
• C. Biometric
• D. Token

Answer: (A)

This question tests how a smart card-based credential enables door access. A smart card is a physical card with an embedded chip that stores credentials and can be read by a door reader. When the card is presented, the reader checks the credential and, if authorized, unlocks the entry. That setup is the essence of an access badge: the badge itself serves as the credential that operates the entry system. Passwords are secrets you type, not a physical card; biometrics rely on a user’s physical trait rather than a card; a token usually refers to a separate device that generates codes or provides a key, not a card used at the entry reader. So the mechanism described is access badges.

This question tests how a smart card-based credential enables door access. A smart card is a physical card with an embedded chip that stores credentials and can be read by a door reader. When the card is presented, the reader checks the credential and, if authorized, unlocks the entry. That setup is the essence of an access badge: the badge itself serves as the credential that operates the entry system. Passwords are secrets you type, not a physical card; biometrics rely on a user’s physical trait rather than a card; a token usually refers to a separate device that generates codes or provides a key, not a card used at the entry reader. So the mechanism described is access badges.