What is true about firewall rule inheritance?

The statement regarding firewall rule inheritance being true is that rules can be reused in different policies. This feature of rule reuse allows for a more efficient management of firewall configurations within Trend Micro Deep Security, as administrators can create a set of rules that define certain behaviors or protections, and then apply these rules across multiple policies as needed.

This approach promotes consistency in security measures, as the same rules are applied universally where necessary, reducing the risk of errors or omissions that could occur if rules were individually created for each policy. The ability to reuse rules streamlines the policy management process, making it easier for administrators to maintain and update security configurations over time.

The options regarding disabling parent level rules, rules applying only at the computer level, and automatic deletion of rules are not accurate reflections of how firewall rule inheritance functions within the system, as firewall rules can be managed in a more flexible and reusable manner.