HCIA-Security H12-711_V4.0 Reddit Questions

Explanation From HCIA-Security documents:

Huawei firewalls use security zones to classify interfaces and apply interzone access control and security policies. Some zones are predefined default zones that are built into the system to represent common network roles, such as Trust and Untrust. These default zones are foundational for typical deployments and are generally not allowed to be deleted, because many policy and security mechanisms rely on them as standard references.

In contrast, DMZ is commonly used as a semi-trusted zone for servers that must be reachable from the Internet while still being isolated from the internal network. On Huawei firewalls, DMZ is treated as a configurable zone: administrators can create it when needed, remove it when it is not required, and adjust its priority value so that zone-based matching and policy selection behave as intended in multi-zone deployments.

“ISP” is not a standard default security zone name in the typical Huawei firewall zone model presented at HCIA level. Therefore, among the options, DMZ is the zone that can be deleted and whose priority can be reconfigured.