The zero-trust model is a security concept centered on the belief that organizations should not automatically trust anything inside or outside its perimeters and instead must verify anything and everything trying to connect to its systems before granting access. The Software Defined Perimeter (SDP) aligns with this model by creating a dynamic, context-aware, and secure boundary around network resources. SDP controls access to resources based on identity, authentication, and authorization, ensuring that only authenticated and authorized users or systems can access the services they require. This approach minimizes the attack surface by hiding network resources from unauthorized or unauthenticated users, which is a core principle of zero-trust security.