Answer:
defense in depth
Step-by-step explanation:
Defense in Depth is simply a way of approaching cybersecurity that is based on a series of defensive mechanisms or techniques are followed for the purpose of protecting very important information and data. In this type of security concept, if one of the mechanism fails, another mechanism takes effect immediately to remove the attack. It is also known as the castle approach for the fact that it is like a replica to the layered defenses of a medieval castle. In the example, the Chief Security Officer puts in place a series of defense mechanism to counter any threat, and if one fails to, another will surely discover and counter the threat.