a domain controller that, in addition to its full, writable domain directory partition replica, also stores a partial, read-only replica of all other domain directory partitions in the forest
a domain controller that stores a partial Read Only copy of all the other domain directory partitions in the forest
a domain controller that stores a partial Read Only copy of the domain directory, the schema directory and the configuration directory partition
a domain controller that stores extra information
a domain controller that stores information about all objects in the forest, but not their attributes, so that applications can search Active Directory without referring to specific domain controllers that store the requested data
a special domain controller that not only holds a full replica of its local domain partition but also a read-only copy of a subset of attributes of every object in every other domain
domain controller that contains the global catalog for the forest.
This refers to the domain controller, which hosts the global catalog for a forest. The global catalog contains partial information of each domain. LDAP-UX utilizes this feature to find out which domain a queried data belongs to. The root domain is the default GCS.