An IT administrator must strengthen remote logon security for employees who currently sign in with only a username and password. Management wants the MOST secure authentication option that still keeps passwords in place. Which of the following configurations would BEST meet this requirement?
Password plus a six-digit code sent by SMS
Password only
Password plus a built-in fingerprint reader on the same laptop
Password plus a FIDO2-compliant hardware security key
Combining a hardware security key with the existing password adds a phishing-resistant possession factor to the knowledge factor. The key performs cryptographic challenge-response and must be physically present, making it far harder to intercept or replay. SMS codes are susceptible to SIM-swap and interception, a built-in fingerprint reader does not provide a separate physical device and can be spoofed, and a password alone offers the least protection.
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What is a FIDO2-compliant hardware security key?
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Why are SMS codes considered less secure than hardware keys?
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How does a hardware security key differ from a biometric reader like a fingerprint scanner?
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CompTIA A+ 220-1102 (V14)
Security
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