FSMO Roles

Domain Naming Master:-Checks and Maintains the Uniqueness of the Domain Names in the Whole Forest. It is Responsible for Adding, Removing and Renaming the domain names in the whole Forest.

Schema Master:- Schema is a Set of Rules which is used to define the Structure of AD , Schema contains Definitions of all the Objects which are stored in AD. Classes-Class is a Template which is used to Create an Object Attributes-Attributes are Properties of an Object

RID Master:- Allocates pool of Relative IDs (RIDs) to all Domain controllers, It assigns ID's to the Objects which are created in the Domain

PDC Emulator:- Acts as a PDC for Windows NT 4.0 BDC's in the domain,Processes all password updates for clients not running ,Active Directory client software, Receives immediate updates from other domain controllers when a user's password is changed, It Synchronizes time between the Domain controllers.

Infrastructure Master:- Infrastructure Master Maintains and Updates the Universal Group Membership information , It is Used for Inter-Domain Operations

Global Catalog:- The global catalog contains Complete information of Host Domain & partial information of other domainsin a forest. By searching against the GC, individual domains do not have to be queried in most cases- GC can resolve Servers that hold a copy of the global catalog are called global catalog servers.