Which of the following is NOT a group scope defined by Active Directory?

Active Directory defines specific group scopes to manage permissions and memberships effectively across different domains within an Active Directory forest. The group scopes include Domain Local, Global, and Universal, each serving distinct purposes in terms of access and visibility.

Domain Local groups are used to assign permissions to resources within a single domain. They can contain users from any domain in the forest but are primarily used to manage access to resources located in their own domain.

Global groups are utilized to group users from the same domain. They can be assigned permissions to resources in any domain within the forest, making them a versatile option when managing access across multiple domains.

Universal groups are designed for situations where the group membership needs to include users from multiple domains. They are primarily used for granting access to resources that span several domains within the forest, ensuring that a broader range of users can be managed simultaneously.

In contrast, site-specific is not an established group scope in Active Directory. While site topology is a vital aspect for optimizing network traffic and replication, it does not relate to group scopes. This distinction clarifies that site-specific grouping lacks the defined scope characteristics that the other options possess.