Which solution stops unauthorized access to the system if a user's password is compromised?

A VPN provides a secure tunnel for remote access but does not inherently stop unauthorized access if the credentials used to establish the VPN connection are compromised.

Multifactor authentication requires a user to provide two or more verification factors (e.g., something they know like a password, something they have like a phone, or something they are like a fingerprint) to gain access, making a compromised password alone insufficient for unauthorized access.

Cisco AMP (Advanced Malware Protection) primarily detects and prevents malware, not unauthorized access due to compromised user passwords.

SSL (Secure Sockets Layer) provides encryption for data in transit but does not prevent unauthorized access if the user's password, which is used for authentication, is compromised.