Question: When mapping a SendAuthenticationInfoRes (v2) to an AIA command, what value should the IWF set for the Result-Code / Experimental-Result AVP if it receives an error with a diagnostic parameter of imsiUnknown?
Option 1: DIAMETER_SUCCESS
Option 2: DIAMETER_ERROR_USER_UNKNOWN
Option 3: DIAMETER_ERROR_UNKNOWN_SUBSCRIPTION
Option 4: DIAMETER_AUTHENTICATION_REJECTED
Explanation: According to the specified mapping rules, if an error of unknownSubscriber without a diagnostic parameter or with a diagnostic parameter of imsiUnknown is received, the IWF should set the Result-Code / Experimental-Result AVP to DIAMETER_ERROR_USER_UNKNOWN, ensuring proper handling and indication of user unknown errors.