Question: In an MBMS (Multimedia Broadcast/Multicast Service) context, what is a characteristic of a session description instance formatted according to the Session Description Protocol (SDP)?
Option 1: It can describe multiple types of sessions (Streaming, FLUTE Download, Transparent) within a single instance.
Option 2: It is exclusively used for MBMS download delivery methods.
Option 3: Each instance must describe only one type of session (either Streaming, FLUTE Download, or Transparent).
Option 4: It cannot include multiple media descriptions for RTP sessions in a Streaming session.
Explanation: According to the SDP formatting rules for MBMS session descriptions, each instance is dedicated to describing one specific type of session. This ensures clarity and prevents confusion between different session types (Streaming, FLUTE Download, or Transparent), each with its unique requirements and configurations in an MBMS setup.