Question: What is a requirement for Policy Control Function (PCF) deployment in a network?
Option 1: The PCF must be able to handle all PDU Sessions in a PLMN.
Option 2: It shall be possible to deploy a network so that the PCF may serve only specific Data Network Names (DNs).
Option 3: The PCF can only correlate AF service sessions established over N5 with PDU Sessions handled over N7.
Option 4: Unique identification of a PDU Session in the PCF is not possible based on any tuple.
Explanation: According to the principles for PCF selection and discovery, it shall be possible to deploy a network so that the PCF may serve only specific Data Network Names (DNs), allowing for Policy Control to be enabled on a per DNN basis.