Since some folks may not be familiar with Active Directory, "gc" stands for Global Catalog. What is the global catalog? "The global catalog is a distributed d

Since some folks may not be familiar with Active Directory, "gc" stands for Global Catalog. What is the global catalog? "The global catalog is a distributed data repository that contains a searchable, partial representation of every object in every domain in a multidomain Active Directory Domain Services (AD DS) forest." Global Catalog servers are domain controllers -- such as the ones identified by the DNS queries issued in this article -- that contain this data.