Question: In a 5G network, when does the 'Number of failed SM policy authorization updates' counter increment at the Policy Control Function (PCF)?
Option 1: Upon successful transmission of an Npcf_PolicyAuthorization_Update response to an NF consumer.
Option 2: When the PCF receives a policy update request from the UE (User Equipment).
Option 3: During each periodic policy authorization update, regardless of outcome.
Option 4: Upon transmission of an Npcf_PolicyAuthorization_Update response indicating a failed SM policy authorization update to an NF consumer.
Explanation: This is correct because the counter increments by 1 for each Npcf_PolicyAuthorization_Update response sent by the PCF to an NF consumer that indicates a failed SM policy authorization update, relating to the management of policy updates and their success/failure tracking within the 5G network's orchestration and management framework.