This standard defines discovery, authentication, and authorization protocols between hosts and storage devices over multiple transports. This standard specifies a new Silo Type Identifier (STID) allocation process that uses the IEEE Registration Authority. Revision Standard - Superseded. Discovery, authentication, and authorization protocols between hosts and storage devices over multiple transports are defined in this standard. It specifies a new Silo Type Identifier (STID) allocation process that uses the IEEE Registration Authority.