What challenges attackers to overcome security barriers at the perimeter, local network, and endpoint?

Defense-in-depth is a cybersecurity strategy that employs multiple layers of defense to protect valuable data and resources. By implementing various security measures at the perimeter, local network, and endpoint levels, it creates a robust framework that attackers must navigate to breach any protected systems. Each layer serves as an obstacle, making it more challenging for cyber attackers to find a vulnerable point of entry.

The concept is built on the understanding that no single security mechanism is foolproof. Instead, by layering security such as firewalls, intrusion detection systems, encryption, and endpoint protection, organizations can significantly reduce the risk of successful attacks and potentially mitigate the impact of threats that do manage to get through one layer. The idea is to strive for a comprehensive approach to security, increasing the complexity and labor involved for attackers, thereby enhancing overall network security.

While packet filtering, anomaly detection, and application management are important components of a security strategy, they represent more specific tools or practices rather than a comprehensive strategy like defense-in-depth. Packet filtering focuses on controlling network access at the packet level, anomaly detection involves identifying unusual patterns that may signify a security threat, and application management oversees the security and performance of applications within the network. Each of these has its own role, but they do not encapsulate the