Short answer
MFA is a login that requires proof from two or more different categories of evidence rather than one. The categories are what you know, what you have, and what you are. Two items from the same category, such as a password and a security question, do not qualif...
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Search tips
Use quotes for an exact phrase, a silo name to narrow ("security mfa"), or a port number to find the protocol page ("port 4500").
