only one as soon as the first DC is created automatically rest depends on the infrastructure how many DCs one wants to configure as GCs
The global catalog contains a complete replica of all objects in Active Directory for its Host domain, and contains a partial replica of all objects in Active Directory for every other domain in the forest.
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 forest. The global catalog is stored on domain controllers that have been designated as global catalog servers and is distributed through multimaster replication. Searches that are directed to the global catalog are faster because they do not involve referrals to different domain controllers.
In addition to configuration and schema directory partition replicas, every domain controller in a Windows 2000 Server or Windows Server 2003 forest stores a full, writable replica of a single domain directory partition. Therefore, a domain controller can locate only the objects in its domain. Locating an object in a different domain would require the user or application to provide the domain of the requested object.
The global catalog provides the ability to locate objects from any domain without having to know the domain name. A global catalog server is 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. The additional domain directory partitions are partial because only a limited set of attributes is included for each object. By including only the attributes that are most used for searching, every object in every domain in even the largest forest can be represented in the database of a single global catalog server.
five
by buying from catalogs
1
1
25,000
One can buy AtHome American catalogs from their official AtHome America web site. One can also purchase catalogs from Wahm, IKEA, Sears and many more.
There are not currently any print catalogs offering antique farm equipment. There are many online catalogs, including http://www.applehollow.com, that offer antique farm equipment.
124 constellations
There are many websites online that offers advice to compare Christmas catalogs. Many writers have blogs in which they post their opinions. Some blogs are Adorama and My Simpler Life.
There is not any data regarding the amount of catalogs that Sears has sold. However, at one point Sears had 1.3 million catalog subscribers.
You can browse online Target catalogs directly on their website. They have many catalogs that you can view in different categories such as Home and Baby.
by buying from catalogs