Question: How are a Metadata Envelope and its associated metadata fragment typically transported in an MBMS (Multimedia Broadcast/Multicast Service) context?
Option 1: Embedded within the same metadata envelope or together in a multipart MIME container, in-band of the same transport session.
Option 2: The envelope is sent over a dedicated control plane, while the fragment is transmitted over the user plane.
Option 3: As separate entities, with the envelope preceding the fragment in sequential but distinct transport sessions.
Option 4: Exclusively via out-of-band signaling for the envelope, with in-band transmission for the fragment.
Explanation: This is correct because MBMS protocols are designed to transport a metadata fragment and its envelope together for efficient and synchronized delivery. Embedding the fragment within the envelope or using a multipart MIME container ensures they remain associated during transmission, facilitating straightforward mapping between the envelope and the fragment.