"Defense in depth" is a cybersecurity strategy employed in networking and the IT field that involves implementing multiple layers of security measures to protect against a variety of threats. Instead of relying on a single point of defense, this approach involves the deployment of diverse security mechanisms at various levels of the network infrastructure. These layers may include firewalls, intrusion detection systems, antivirus software, access controls, encryption, and regular security audits. The goal is to create a multi-faceted defense system that can withstand and mitigate different types of attacks. By adopting a defense-in-depth strategy, organizations enhance their resilience against evolving cyber threats, ensuring that even if one layer is breached, there are additional layers of protection to safeguard critical assets and information. This comprehensive approach contributes to a more robust and secure IT environment.