In directory servers, ________.

• A. There can only be one OU in a directory server
• B. There can only be one O in a directory server
• C. Both A and B
• D. Neither A nor B

Answer: (B)

In directory structures, the top-level entry defines the organization and serves as the umbrella for the entire directory. This organization (the O object) is typically unique within a given naming context, providing a single, authoritative root for the directory’s scope. Beneath that, you create organizational units (OUs) to organize resources such as users, groups, and devices. There is no limit to how many OUs you can have, which lets you reflect departments, teams, or locations within the organization.

So the statement that there can only be one O in a directory server is the best fit: the O serves as the single top-level organizational context for a directory suffix, while multiple OUs can exist under it.