Defence in Depth is a critical concept in the field of cybersecurity, one that emphasizes a strategic layering of security measures to safeguard an organization's information and assets. This multifaceted approach means that if one layer of defense is breached, others remain to protect against potential threats. By employing several types of security controls across various points within a network, organizations can significantly reduce the risk of unauthorized access, data breaches, and other malicious activities. This layering can include a combination of physical security measures, firewalls, encryption, access controls, endpoint protection, and regular security assessments, all designed to work together to create a stronger security posture.