1.4 Relationship to Other Protocols
The reporting and metadata synchronization protocols include Web services that use SOAP (as specified in [SOAP1.1]) over HTTP or HTTPS (as specified in [RFC2616]) for communication. The self-update and content synchronization protocols use HTTP 1.1 (as specified in [RFC2616]).
Figure 1: Relationship between protocols related to Windows Server Update Services: Client-Server Protocol
This specification is closely related to the Windows Server Update Services: Server-Server Protocol, as specified in [MS-WSUSSS], which defines mechanisms for synchronizing updates within a hierarchical configuration of update servers.