Which of the following, in addition to a password, can be asked of a user for MFA?
Correct Answer: A
MFA stands for Multi-Factor Authentication, which is a method of verifying the identity of a user by requiring two or more pieces of evidence that belong to different categories: something the user knows, something the user has, or something the user is. A password is something the user knows, and it is usually combined with another factor such as a PIN (Personal Identification Number) or a hard token (a physical device that generates a one-time code) that the user has. A favorite color or a mother's maiden name are not suitable for MFA, as they are also something the user knows and can be easily guessed or compromised.
Reference
1: Multi-Factor Authentication - N10-008 CompTIA Network+ : 3.1
2: CompTIA Network+ Certification Exam Objectives, page 13
3: CompTIA Network+ N10-008 Certification Study Guide, page 250
4: CompTIA Network+ N10-008 Exam Subnetting Quiz, question 14