How does layered defense contribute to cybersecurity?

Layered defense, also known as defense in depth, is a cybersecurity strategy that implements multiple levels of security controls to protect information and systems. By employing various security measures throughout an organization's infrastructure, it acts as a robust barrier against potential threats.

The correct choice emphasizes that layered defense increases the time and cost required for attackers to successfully breach an organization's defenses. When multiple security layers are in place—such as firewalls, intrusion detection systems, endpoint protection, and access controls—an attacker would need to bypass each layer individually. This complexity can significantly hinder an attacker's progress, requiring more sophisticated tactics and resources, which may deter them from pursuing an attack altogether.

In contrast, a strategy that only allows for one defense mechanism at a time would not provide the same level of security and would likely be more susceptible to breaches. Additionally, while it might seem that layered defense could simplify security measures, its true value lies in creating an intricate network of safeguards that collectively enhance protection. Thus, layered defense does not eliminate the need for advanced security tools; rather, it integrates them effectively to bolster overall security posture.