Question: What is the primary purpose of the DL NAS TRANSPORT message in a 5G System (5GS)?
Option 1: To establish a connection between the UE and the network.
Option 2: To transport signaling messages from the UE to the network.
Option 3: To manage session resources on the network side.
Option 4: To transport message payload and associated information from the network to the UE.
Explanation: The DL NAS TRANSPORT message is used to transport message payload and associated information from the network to the User Equipment (UE), as indicated in the message definition. This highlights its role in downlink communication, where data is sent from the network to the UE.