"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." http://technet.microsoft.com/en-us/library/cc728188(WS.10).aspx
The global catalog is a domain controller that contains attributes for every object in the Active Directory. By default, only the members of the Schema Admins group have rights to change which attributes stored in the global catalog, according to organization's requirements. The global catalog contains: The commonly used attributes need in queries, such as a user's first and last name, and logon name.
All the information or records which are important to determine the location of any object in the directory.
A default subset of attributes for each object type.
All the access related permissions for every object and attribute that is stored in the global catalog. Say, without permission you can't access or view the objects. If you are searching for an object where you do not have the appropriate permissions to view, the object will not appear in the search results. These access permissions ensure that users can find only objects to which they have been assigned access. A global catalog server is a domain controller that contains full and writable replica of its domain directory, and a partial, read-only replica of all other domain directory partitions in the forest.
The role of ESE in an active directory is to store and retrieve data through indexed and sequential access.Its the data storage technology from Microsoft.
global catalog 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. schema All databases have a schema which is a formal definition (set of rules) which govern the database structure and types of objects and attributes which can be contained in the database. The schema contains a list of all classes and attributes in the forest. The schema keeps track of: * Classes * Class attributes * Class relationships such as subclasses (Child classes that inherit attributes from the super class) and super classes (Parent classes). * Object relationships such as what objects are contained by other objects or what objects contain other objects. There is a class Schema object for each class in the Active Directory database. For each object attribute in the database, there is an attributeSchema object. Schem Master is A FSMO role held by single DC in forest
help to manage resources of organization
The role refers to the service or services that the server is providing, such as DHCP, DNS, HTTP, etc.
1 for each active directory (AD) site
DomainDNSzones
The DNS Server Role and the active directory is not installed till the adds service is started on the server 2008.if the service is not started(one needs to check the option under roles of the server)the active directory installation wont happen.this feature is only in 2008 not in 2003.The active directory works as service in 2008
infrastructure master
1 for each active directory (AD) site
Start->Manage Your Server-> Add or Remove Role, then check Active Directory and follow instructions. Note: 1: start>program>manage your server>add or Remove Role>Active Directory then follow instructions. 2: Start>Run> dcpromo Note: Dcpromo is a command installation of active directorey. wheh open run command just type dcpromo and click ok. then follow instructions.
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