1.4 Relationship to Other Protocols
For locating a domain controller (DC) that is a time source, these extensions rely on the Netlogon domain controller locator service, as specified in [MS-NRPC] section 3.5.4.3. For authenticating message exchanges, these extensions rely on NetLogon message protection methods, as specified in [MS-NRPC] section 3.5.4.8.

Figure 1: Protocol relationships
The W32Time Remote Protocol, as specified in [MS-W32T], is an RPC interface protocol used for controlling and monitoring the Windows implementation of NTP. The protocol relationship between the W32Time Remote Protocol and this protocol is illustrated in [MS-W32T] section 1.4.