In security, what does the "layered security approach" entail?

The layered security approach entails implementing multiple security measures to create several barriers against potential threats, effectively enhancing the overall safety and security of an individual or organization. This approach recognizes that no single security measure is foolproof, and therefore, combining various layers of security—such as physical barriers, access controls, surveillance systems, and cybersecurity measures—provides a more comprehensive defensive posture.

By employing multiple layers, the approach mitigates the risk of vulnerabilities at any individual point of failure. For instance, if one layer is compromised, others remain intact to deter or prevent an intrusion. This method promotes redundancy, ensuring that if a threat bypasses one layer, additional defenses are still in place to respond to the incident.

The other choices do not align with the principles of the layered security approach. High-tech solutions alone may not address all security needs, as there are also physical and procedural aspects to consider. A single point of control can create a major vulnerability, as attackers may focus on that one point to gain access. Lastly, while cost management is important, prioritizing cost-cutting at the expense of robust security measures could lead to insufficient protection, defeating the purpose of having a layered approach in the first place.