MFA
Multifactor Authentication
Authentication using two or more distinct factor types.
MFA requires two or more independent factors, drawn from something you know, something you have, and something you are, so a single stolen credential is not enough to gain access. It sharply reduces the impact of phishing and password reuse, which is why it is a baseline control for remote and privileged access. Combining two passwords is not MFA because both come from the same category. Phishing resistant forms such as hardware security keys defend against real time relay attacks that intercept one time codes.
Multi-Factor Authentication: two or more different factor types (something you know, have, or are).
Looking MFA up is step one. Getting tested on it is step two.
A free account opens all 4 Domain 1 objectives, 271 exam-style questions with a lesson and a lab on each, a placement check that skips what you already know, and a dated plan. No card.
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