Which of the following is an example of a layered defense?

Layered defense is a security strategy that employs multiple protective measures at different levels to safeguard systems and data. The concept is rooted in the principle of defense in depth, where each layer of defense serves as an additional barrier that potential attackers must bypass before reaching valuable assets.

The correct choice illustrates the layered defense approach effectively. In this scenario, if an attacker breaches the initial defense, they encounter a different form of defense. This means that even after overcoming one layer, they are still not through; they must face another set of obstacles. This not only complicates the attacker's task but also increases the chances of detection and thwarting their efforts.

By employing multiple layers, organizations can create a more robust security posture, where the failure of one layer does not immediately compromise the entire system. This approach acknowledges that no single defense mechanism is infallible and emphasizes the need for diverse strategies working together to secure critical assets.