What distinguishes built-in roles in Azure RBAC from custom roles?
Custom roles can only be applied to resource groups, while built-in roles are applicable at all levels of the Azure hierarchy.
Built-in roles define the geographic scope of access, whereas custom roles are used to restrict access to specific resource types regardless of location.
Built-in roles enable just-in-time access, whereas custom roles provide permanent access to Azure resources.
Built-in roles are predefined by Azure and cannot be modified, while custom roles allow for the specification of a unique set of permissions.