Which small device is used for two-factor authentication and can be attached to a key chain?

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Study for the Network Security Instructional Terminology Test. Enhance your knowledge with multiple choice questions, each accompanied by hints and explanations. Ensure readiness for your exam!

Multiple Choice

Which small device is used for two-factor authentication and can be attached to a key chain?

Explanation:
Two-factor authentication relies on proving you have something physical in addition to something you know. A key fob fits perfectly as the portable, attachable device that provides the “something you have” factor. It’s small enough to clip to a key chain and often generates a one-time password or responds to a prompt, giving you a fresh credential each time you log in. The other options serve different purposes: a smartcard is a card used with a reader to authenticate, a USB token is a USB device you must insert into a computer, and a security badge is mainly for building or room access rather than a digital 2FA login.

Two-factor authentication relies on proving you have something physical in addition to something you know. A key fob fits perfectly as the portable, attachable device that provides the “something you have” factor. It’s small enough to clip to a key chain and often generates a one-time password or responds to a prompt, giving you a fresh credential each time you log in.

The other options serve different purposes: a smartcard is a card used with a reader to authenticate, a USB token is a USB device you must insert into a computer, and a security badge is mainly for building or room access rather than a digital 2FA login.

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