Question: What triggers the Network Exposure Function (NEF) to send a PDTQ Warning Notification to an Application Function (AF) in a 5G System?
Option 1: Expiration of a planned data transfer's scheduled time
Option 2: Change in User Equipment (UE) location outside the Area of Interest
Option 3: Successful completion of a data transfer with QoS requirements
Option 4: Network or Data Network (DN) performance reaching operator-set criteria in the Area of Interest
Explanation: The correct answer is Option 4 because the PDTQ Warning Notification is specifically sent by the NEF to inform the AF about changes in network conditions (such as network or DN performance) within a defined area that meet the thresholds set by the operator, which could impact planned data transfers with specified QoS requirements. This ensures the AF is aware of potential impacts on its requested data transfer quality.