Which technology is listed as an example of two-factor authentication?

Which technology is listed as an example of two-factor authentication?

• A. Password
• B. RADIUS with tokens
• C. Username
• D. Magnetic swipe card without token

Answer: (B)

Two-factor authentication requires proving your identity with two independent factors, typically something you know and something you have. In a setup using RADIUS with tokens, you provide a one-time code generated by a token (something you have) along with a password (something you know). The combination satisfies two factors and is verified by the RADIUS server, making it a proper example of 2FA. A password alone is only one factor, so it isn’t two-factor. A username isn’t an authentication factor itself, it’s just an identifier. A magnetic swipe card without a token relies on a single factor (the card) and lacks a second factor like a PIN or password, so it doesn’t meet 2FA.

Two-factor authentication requires proving your identity with two independent factors, typically something you know and something you have. In a setup using RADIUS with tokens, you provide a one-time code generated by a token (something you have) along with a password (something you know). The combination satisfies two factors and is verified by the RADIUS server, making it a proper example of 2FA. A password alone is only one factor, so it isn’t two-factor. A username isn’t an authentication factor itself, it’s just an identifier. A magnetic swipe card without a token relies on a single factor (the card) and lacks a second factor like a PIN or password, so it doesn’t meet 2FA.