Exam CISA topic 1 question 728 discussion

C. Installing biometrics-based authentication. They are talking about physical intrusion and not network intrusion.

Configuring your router as a firewall (option B) is a basic security measure to prevent unauthorized access to your network from outside, but it does nothing to detect intrusion attempts. Firewalls typically provide protection by blocking unauthorized traffic, but they do not generate detailed logs of attempts. Therefore, for the specific purpose of detecting intrusion attempts, the most effective method is to regularly review log files.