Cisco CCNA 200-301 Practice Question

Implementing multifactor authentication provides the most effective enhancement to security because it requires users to present multiple forms of verification, such as something they know (a password) and something they have (a token or mobile device). This reduces the risk of unauthorized access even if a password is compromised. Enforcing complex passwords, setting frequent password expirations, and enabling account lockout policies do improve security but are less effective individually compared to the added layer of protection offered by multifactor authentication.