Question: What is the purpose of the Nnsacf_NSAC_NumOfPDUsUpdate service operation in the 5G System (5GS)?
Option 1: To update the number of PDU Sessions established on a network slice and check if the maximum number of PDU Sessions per network slice has been reached.
Option 2: To establish a new PDU Session on a network slice without checking the maximum number of PDU Sessions.
Option 3: To terminate an existing PDU Session on a network slice.
Option 4: To update the UE ID and PDU Session ID parameters in the NSACF.
Explanation: The Nnsacf_NSAC_NumOfPDUsUpdate service operation is used to update the number of PDU Sessions established on a network slice, such as increasing or decreasing the number. It also checks whether the maximum number of PDU Sessions per network slice has been reached before allowing the update. This ensures that the network slice does not exceed its capacity and prevents overload.