A directory service or DS is software application or furthermore a set of applications which is programmed to accumulate and organized computer network’s users as well as network resources, which also allows network overseer to supervise user’s access to the resources. Aside from that the directory service also acts as an abstraction layer in between the users and through the shared resources.
The directory service offers the access bordered to the data which is contained with one or more directory namespaces. Its interface act as the core/common authority which can steadily substantiate the system resources that manipulate the directory data; just like a database, the directory service is extremely optimized for reading purposes and sustained early search possibilities on a number of aspects which can be correlated with the objects in the directory. Whatever data saved in the directory is defined and by an extendible and changeable diagram. On the other hand, the directory services are used as dispense model storing for their data and that information is duplicated between the directory servers.
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