To provide flexibility when you build the security infrastructure for your organization, you can choose from two types of security groups. There are independent security groups and groups that are not independent.
When you create a security group in the Security Groups application, you can specify whether the security group is independent or is not independent. If you create a security group that is not independent, the access rights and grants in the security group are combined with the rights and grants in similar security groups. The access rights and grants for an independent security group cannot be combined with the rights and grants from other security groups.