What is MFA (Multifactor Authnetication)?

Multi-factor Authentication (MFA) is defined as the most efficient authentication method that requires users to provide two or more verification factors to access resources within a network. MFA offers access to applications, user account, or a VPN. MFA is a crucial element of a strong IAM (Identity and Access Management) policy and it requires one or more additional verification factors other than username and password. One-time passwords (OTP) and security questions are the most common MFA factors used in authenticating a user.