Which of the following is an example of a preventive measure against cyber threats?

Implementing firewalls and antivirus software serves as a preventive measure against cyber threats because these tools are designed to block unauthorized access and detect harmful software before it can cause damage. Firewalls act as barriers between trusted internal networks and untrusted external networks, filtering incoming and outgoing traffic based on predetermined security rules. Antivirus software protects systems by identifying and removing malicious programs, thus preventing them from infecting devices or data.

In contrast, conducting a post-incident analysis focuses on evaluating and understanding incidents after they have occurred, which is more about response and recovery rather than prevention. Responding to security incidents after they occur involves dealing with breaches once they have happened, thus aiming at mitigation rather than proactive measures. Regularly changing user passwords is a good security practice, but it is primarily a user authentication measure and may not be as comprehensive in preventing cyber attacks compared to the use of firewalls and antivirus solutions. Implementing both firewalls and antivirus systems collectively enhances an organization’s security posture by proactively defending against a wide range of cyber threats.