In the context of computer networks and Active Directory, a domain is a logical grouping of network resources, such as computers, users, and other objects. Each domain has a unique name and is administered independently.
In general, it is not necessary to administer a domain one-on-one. It can be administered centrally from a single location using Active Directory Domain Services (AD DS) or other directory services. However, there are situations where it may be more appropriate to administer certain domains one-on-one:
Small domains: If a domain contains only a few resources, it may be more efficient to administer them one-on-one rather than using a centralized directory service.
Isolated domains: If a domain is isolated from other domains, it may not be feasible to use a centralized directory service. In this case, it would be necessary to administer the domain one-on-one.
Security requirements: In some highly-sensitive environments, it may be necessary to limit access to domain resources and administration to only a small number of individuals. In such cases, it would be necessary to administer the domain one-on-one.
In summary, it is not necessary to administer a domain one-on-one, but there may be situations where it is more appropriate, such as when the domain is small, isolated, or has specific security requirements.
