Name one method to ensure security for remote users accessing IPO.

Enforcing strong passwords and two-factor authentication mechanisms for user accounts is a highly effective method to enhance security for remote users accessing the IPO. Strong passwords significantly reduce the risk of unauthorized access by making it more difficult for potential attackers to gain entry through simple password guessing or brute force attacks. Additionally, implementing two-factor authentication (2FA) adds an extra layer of security by requiring users to verify their identity through a second method, such as a text message verification code or a biometric scan. This dual requirement ensures that even if a password is compromised, unauthorized parties would still need the second form of verification to gain access, providing a robust defense against various forms of cyber threats.

While the other options may offer some security benefits, they do not encompass the same level of comprehensive protection for remote users as the combination of strong passwords and two-factor authentication does. For example, regularly changing passwords without informing users could lead to confusion and accessibility issues, while requiring all users to access the system through a VPN could introduce additional complexity that may not be feasible for all users. Limiting access to local IP addresses restricts accessibility and could hinder legitimate remote users from connecting effectively. Therefore, the approach of utilizing strong passwords and 2FA is a best practice in maintaining security for remote