Question: What is the relevance of Diameter NASREQ (IETF RFC 7155) AVPs to the Gi/Sgi interface, as per the current specification?
Option 1: All Diameter NASREQ AVPs marked with "M" are mandatory for compliance.
Option 2: Only a subset of Diameter NASREQ AVPs marked with "M" is required for compliance.
Option 3: Diameter NASREQ AVPs marked with "M" have no relevance to the Gi/Sgi interface.
Option 4: Other Diameter NASREQ AVPs, even if their AVP flag rules are marked with "M", are not required for being compliant.
Explanation: The correct answer is Option 4 because the specification explicitly states that other Diameter NASREQ (IETF RFC 7155) AVPs, even if their AVP flag rules are marked with "M", are not required for being compliant with the current specification. This indicates that only a specific set of AVPs detailed in this clause are relevant to the Gi/Sgi interface, and others are not mandatory for compliance.