What types of naming convention active directory uses?

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Here are the information about naming convention active directory uses.

What types of naming convention active directory uses?

Active Directory supports several types of names for the different formats that can accessActive Directory. 

These names include:

■ Relative Distinguished Names 

The relative distinguished name (RDN) of an object identifies an object uniquely, but only within its parent container. Thus the name uniquely identifies the object relative to the other objects within the same container. In the example

CN=wjglenn,CN=Users,DC=contoso,DC=com,

the relative distinguished name of the object is CN=wjglenn. The relative distinguished name of the parent organizational unit is Users. For most objects, the relative distinguished name of an object is the same as that object’s Common Name attribute. Active Directory creates the relative distinguished name automatically, based on information provided when the object is created. Active Directory does not allow two objects with the same relative distinguished name to exist in the same parent container.

The notations used in the relative distinguished name (and in the distinguished name discussed in the next section) use special notations called LDAP attribute tags to identify each part of the name. The three attribute tags used include: 

■ DC The Domain Component (DC) tag identifies part of the DNS name of the domain, such as COM or ORG. 

■ OU The Organizational Unit (OU) tag identifies an organizational unit container. 

■ CN The Common Name (CN) tag identifies the common name configured for an Active Directory object. 

■ Distinguished Names

Each object in the directory has a distinguished name (DN) that is globally unique and identifies not only the object itself, but also where the object resides in the overall object hierarchy. You can think of the distinguished name as the relative distinguished name of an object concatenated with the relative distinguished names of all parent containers that make up the path to the object.

An example of a typical distinguished name would be:

CN=wjglenn,CN=Users,DC=contoso,DC=com.

This distinguished name would indicate that the user object wjglenn is in the Users container, which in turn is located in the contoso.com domain. If the wjglenn object is moved to another container, its DN will change to reflect its new position in the hierarchy. Distinguished names are guaranteed to be unique in the forest, similar to the way that a fully qualified domain name uniquely identifies an object’s placement in a DNS hierarchy. You cannot have two objects with the same distinguished name. 

■ User Principal Names

The user principal name that is generated for each object is in the form username@ domain_name. Users can log on with their user principal name, and an administrator can define suffixes for user principal names if desired. User principal names should be unique, but Active Directory does not enforce this requirement. It’s best, however, to formulate a naming convention that avoids duplicate user principal names. 

■ Canonical Names

An object’s canonical name is used in much the same way as the distinguished name— it just uses a different syntax. The same distinguished name presented in the preceding section would have the canonical name:

contoso.com/Users/wjglenn.

As you can see, there are two primary differences in the syntax of distinguished names and canonical names. The first difference is that the canonical name presents the root of the path first and works downward toward the object name. The second difference is that the canonical name does not use the LDAP attribute tags (e.g., CN and DC).

 What is multimaster replication?

Active Directory follows the multimaster replication which every replica of the Active Directory partition held on every domain is considered an equal master. Updates can be made to objects on any domain controller, and those updates are then replicated to other domain controllers.

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