Flexible Single Master Operation Roles(FSMO Roles):-

1. Names Master
2. Schema Msater
3. RID Master
4. PDC Emulator
5. Infrastructure Master

1.Naming Master:-

• Check the Maintains the Uniqueness off the Domain Names in the Whole Forest.

• It is Responsible for adding. Removing and renaming the domain names in the whole Forest.

2.Schema Master:-

• Schema is a set of rules which is used to define the structure if AD.

• Schema contains Definitions of all the objects which are stored in AD.

• Schema is further classified into:

             - Classes
                         Classed is a Template which is used to create an objest
             -Attributes
                         Attributes are Properties of an object

3.RID Master:-

• It assigns unique IDs (RIDs) to the objects which are created in the domain.

• Allocates pool of Relative IDs (RIDs) to all domain controllers within a Domain.

4.PDC Emulator:-

• Acts as a PDC for Windows NT 4.0 BDC’s in the domain

• Processed all passwords updates for clients

• Receives immediate updates from other domain controllers when a user’s password is changed

• It Synchronizes time between the Domain controllers.

5.Infrastructure Master:-

• Infrastructure Master Maintains and updates the Universal Group Membership information.

• It is used for Inter-Domain Operations.

Global Catalog:-

• A global catalog server is a domain controller. It is a master searchable database that contains information about every object in every domain in a forest.

• 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.