Question: What is a prerequisite for a User Equipment (UE) to support event-triggered logged measurements in RRC_IDLE state?
Option 1: The UE must be in RRC_CONNECTED state.
Option 2: The network must have previously performed a security authentication with the UE.
Option 3: The UE's capabilities include support for handover procedures.
Option 4: The UE must also indicate support for logged measurements in idle mode.
Explanation: For a UE to support event-triggered logged measurements in RRC_IDLE, it is mandatory that the UE also supports logged measurements in idle mode, ensuring proper handling and reporting of measurements upon network request.