Question: On the S15 reference point, what is the primary purpose of including the Vendor-Id AVP with value 10415 within the Supported-Features AVP?
Option 1: To indicate support for non-3GPP features in the Diameter session.
Option 2: To differentiate between multiple feature lists defined for the same reference point.
Option 3: To identify features that have been specifically defined by 3GPP for use on the S15 reference point.
Option 4: To signal the base functionality of the S15 reference point as per 3GPP Rel-11 standard.
Explanation: The correct answer is Option 3 because, according to specifications, the Supported-Features AVP on the S15 reference point identifies features defined by 3GPP, with the Vendor-Id AVP containing the 3GPP vendor ID (10415), ensuring both parties agree on used 3GPP-defined features.