A ________ is a small device with a display that has a number that changes frequently.

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Multiple Choice

A ________ is a small device with a display that has a number that changes frequently.

Explanation:
A one-time-password token. These compact devices display a code that changes regularly (often every 30–60 seconds or with each press). That dynamic code serves as a second factor in authentication, since you must know the code in addition to your password. USB tokens typically store cryptographic keys and may not show a changing number, while magnetic stripe cards carry static data and also don’t display a changing code. So the description of a small display showing a frequently changing number aligns best with an OTP token.

A one-time-password token. These compact devices display a code that changes regularly (often every 30–60 seconds or with each press). That dynamic code serves as a second factor in authentication, since you must know the code in addition to your password. USB tokens typically store cryptographic keys and may not show a changing number, while magnetic stripe cards carry static data and also don’t display a changing code. So the description of a small display showing a frequently changing number aligns best with an OTP token.

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