replication
Active Directory is called active bacause it is actively updating it's data through replication from differnt sites and other domain controllers with in the network
Policy Change Events.
DomainDNSzones
Policy Change Events.
Kerebros protocol i think. By Senthil
There are many components within Exchange that require access to Active Directory services, such as the information store and the message categorizer. The DSAccess component optimizes the communication between these components and Active Directory. The Exchange components that need to interact with Active Directory use DSAccess to retrieve Active Directory information rather than communicating directly with domain controllers and global catalog servers. As a result, DSAccess is therefore a very important part of Exchange. DSAccess is good for system performance, since it maintains a cache that effectively reduces the number of LDAP queries that these Exchange server components make to Active Directory. This is good for query speed as well as load reduction on both domain controllers and global catalog servers.
You run the 'dcpromo' command to remove active directory and demote a domain controller to a member server. To remove AD completely you would have to do this process on all domain controllers.
Outbound replication is when a domain controller transmits replication information to other domain controllers on a network andInbound replication is when a domain controller receives updates to the Active Directory database from other domain controllers on the network.
look on google gosh
Service Intergration protocol (SIP)
Functional levels
Active Directory service is used to store information about the network resources across a domain and also centralize the network.