A Public Security Zone is typically less secure and intended for providing services to untrusted networks; thus, it is not suited for sensitive data. A perimeter network, commonly known as a DMZ, has controlled access but is still more exposed as it often hosts services accessible by untrusted networks, which is not ideal for highly sensitive data. An Internal Zone generally hosts internal services but doesn’t imply the degree of strict access control and dedicated surveillance needed for high-security areas. The correct choice, an Isolated Security Zone, is designed for highly sensitive or critical assets that require stringent access control and monitoring to prevent unauthorized access and provide strong protection against potential security breaches.