A user is setting up a new work email account on their smartphone. The company requires that all employees use an additional layer of security beyond the password. Which of the following will BEST provide this layer of security and meet the company's requirement?
An authenticator app (for example, Microsoft Authenticator or Google Authenticator) generates time-based one-time passwords that are entered after the primary password, giving the user a strong and convenient second factor. Location-based login simply adds context and does not constitute a separate authentication factor. Backup codes are intended for one-time emergency use and are not designed for everyday sign-ins. SMS text messages do provide a second factor, but they are vulnerable to SIM-swapping and interception, so an authenticator app is the more secure and recommended choice.
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What is an authenticator app, and how does it generate one-time passwords?
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Why is SMS authentication considered less secure than authenticator apps?
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What are backup codes in multi-factor authentication, and how should they be used?
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CompTIA A+ 220-1101 (V14)
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