1.4 Relationship to Other Protocols
This protocol uses HTTP 1.0, as described in [RFC1945], HTTP 1.1, as described in [RFC2616], or Hypertext Transfer Protocol over Secure Sockets Layer (HTTPS), as described in [RFC2818], for message transport.
The following diagram shows the underlying messaging and transport stack used by the protocol:
Figure 1: This protocol in relation to other protocols