Question: In a Mobile Network, which of the following identifiers is associated with a request initiated by the Network to update the location of a User Equipment (UE: Mobile Station, MS)?
Option 1: LCS-LocationUpdateRes
Option 2: LCS-PeriodicLocationCancellationArg
Option 3: LCS-LocationUpdateArg (for UE-initiated updates)
Option 4: LCS-LocationUpdateArg
Explanation: The correct answer is LCS-LocationUpdateArg because this identifier specifically refers to a network-initiated location update request sent to the MS, distinguishing it from responses, cancellations, and UE-initiated updates.