1.5 Prerequisites/Preconditions
The WDS Multicast Session Initiation Protocol assumes the client has obtained the following:
Name or IP address of the server.
Name of the multicast namespace.
Name of the content in the multicast namespace.
Authentication requirements for the content.
If the server requires a user identity to control access to the content, then the client MUST use the WDS Multicast Session Initiation Protocol over the WDS Control Protocol; otherwise the client MAY use the Multicast Session Initiation Protocol over UDP.
The content MAY have associated content metadata, which clients MUST understand in order to consume the content. The server is responsible for transporting the content metadata from server to clients but treats it as opaque binary data.
An agreement MUST exist between the multicast namespace and the content provider on the format of the configuration string, which is used by the multicast namespace to instruct the content provider to expose the appropriate content for the multicast namespace.