R

referral

A referral is returned to an LDAP client by a directory system agent (DSA) when the query presented by the client cannot be serviced locally, and the DSA has "knowledge information" about other DSAs that can handle the query.

remote procedure call (RPC)

System for calling software procedures on a different machine using a network. For more information, see Microsoft RPC Model.

replication

Active Directory™ provides multi-master replication. Multi-master replication means that all replicas of a given partition are writeable. This allows updates to be applied to any replica of a given partition. Active Directory replication system propagates the changes from a given replica to all other replicas. Replication is automatic and transparent.

RPC

See remote procedure call.