Question: What is the purpose of the Data Network Name (DNN) in a 5G System (5GS)?
Option 1: To identify a specific User Equipment (UE)
Option 2: To select a particular Serving and Packet Function (SPF)
Option 3: To reference a data network, which may be used to select Session Management Function (SMF) or User Plane Function (UPF)
Option 4: To authenticate a subscriber's identity
Explanation: In a 5GS, the DNN serves as a reference to a data network and can be used to select SMF or UPF. This is similar to how an Access Point Name (APN) functions in EPS.