Which zone on the USC series firewall can be deleted by the administrator?

The security zone on the USC series firewall can indeed be deleted by the administrator, which is essential for configuring the firewall according to specific network requirements. Administrators have the flexibility to manage zones to better align with the organization's security policies and network architecture.

A security zone is typically used to define a logical grouping of interfaces that share similar security requirements. In many firewall architectures, zones can be configured, modified, or deleted based on changes in network strategy or design. This flexibility allows for the adaption of firewall rules and policies as the environment changes.

In contrast, other zones like the trusted zone, untrusted zone, and DMZ (Demilitarized Zone) are generally fundamental to the network security structure and are often considered essential for maintaining network segmentation and security controls. These zones typically serve specific roles within a security model, where trusted zones are for trusted internal traffic, untrusted zones are for external traffic, and the DMZ is for hosting services that should be isolated from the internal network while still accessible from the untrusted external network. Their deletion could compromise the intended security posture of the network, hence why those zones are typically fixed and not deletable by administrators without significant implications.