What mechanism is responsible for propagating changes to other Domain Controllers (DCs) in an Active Directory environment?

In an Active Directory environment, the mechanism responsible for propagating changes to other Domain Controllers is multimaster replication. This method allows multiple Domain Controllers to accept updates and propagate changes throughout the directory. Each Domain Controller holds a copy of the Active Directory database, and changes made on one DC are replicated to others, ensuring that all controllers have an updated and consistent view of the directory data.

The multimaster replication approach is particularly beneficial for fault tolerance and load balancing, as it does not rely on a single DC to handle updates. This flexibility helps maintain high availability and resilience within the Active Directory infrastructure. Consequently, if one Domain Controller fails, others can still function and continue to apply changes.

In contrast, single-master replication implies that only one Domain Controller can make changes, which does not align with the dynamics and requirements of Active Directory. Direct synchronization isn't a recognized term in the context of Active Directory replication and doesn’t describe the actual process of how updates are shared among Domain Controllers. Remote Procedure Call (RPC) is a protocol used for communication between DCs during the replication process, but it does not itself manage the actual replication mechanics.