Question: In a 3GPP Circuit Switched (CS) core network architecture using SIP-I protocols, when handling multicast streams, what is the requirement for supporting specific procedures from IETF RFC 3264?
Option 1: All procedures in relevant sections of IETF RFC 3264 must be fully supported.
Option 2: Only basic offer/answer model procedures are mandatory, without any modifications.
Option 3: Certain procedures do not need to be supported, with specific adjustments applying to the generation of offers for multimedia sessions.
Option 4: Support for all relevant sections of IETF RFC 3264 is optional in multicast stream scenarios.
Explanation: This option correctly reflects the nuanced approach to supporting IETF RFC 3264 procedures in a 3GPP CS core network for multicast streams. By not requiring support for certain procedures, while applying specific modifications to others (for generating offers with multiple media types), it highlights an important exception in handling multimedia sessions, particularly relevant in telecom networks where efficient media stream management is crucial.