When is a volume considered "Public"?

Comprehensive and Detailed Explanation From Exact Extract:

In Portworx, a volume is considered “Public” when guest access is enabled. Guest access allows users and applications without explicit Portworx authentication credentials to access the volume. This setting is typically used in less restrictive environments where access control is relaxed, but it reduces security by exposing data to potentially unauthorized entities. Public volumes can be accessed by any entity with network connectivity and basic permissions, which is why enabling guest access is carefully controlled in secure deployments. Portworx documentation on security models and access controls stresses that public volumes should be used sparingly and monitored closely due to the elevated risk of data exposure and compliance violations【Pure Storage Portworx Security Guide†source】.