Directory and Global Catalog Replication Server Protocols Scenario

Protocols used between instances of Windows Active Directory domain controller servers to enable providing a single distributed directory and authentication service.

Specification	Description
[MS-ADTS]: Active Directory Technical Specification	Specifies the Active Directory Technical protocol. This protocol describes the state model for Active Directory.
[MS-DRSR]: Directory Replication Service (DRS) Remote Protocol Specification	Specifies the Directory Replication Service (DRS) Remote Protocol, an RPC protocol for replication and management of data in Active Directory.
[MS-DSML]: Directory Services Markup Language (DSML) 2.0 Protocol Extensions	Specifies the Directory Services Markup Language (DSML) 2.0 Protocol Extensions. The SOAP session extensions (SSE) make it possible to maintain state information across multiple request/response operations.
[MS-SRPL]: Directory Replication Service (DRS) Protocol Extensions for SMTP	Specifies the Directory Replication Service (DRS) Protocol Extensions for SMTP. These are extensions to the DRS Protocol for transport over the Simple Mail Transfer Protocol (SMTP), which provide an alternate transport for the DRS protocol that may allow domain controllers to perform replication in environments where the RPC transport mechanism is unsuitable.