Two-factor authentication requires how many pieces of identification?
AFour
BTwo
CTen
DSix
Answer & Solution
Correct answer: B. Two
1. A username and password form the first piece.
2. A code to a phone or an email may form the second.
3. So two pieces are needed.
_Source: OpenStax, Workplace Software and Skills, Ch 1 'Technology in Everyday Life and Business'_
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