Question: What is the purpose of the NAS transport procedures in the 5G System (5GS), and what types of payloads can it transport between the UE and the AMF?
Option 1: The purpose of the NAS transport procedures is to provide a secure connection between the UE and the AMF, and it can only transport SMS messages.
Option 2: The purpose of the NAS transport procedures is to manage PDU sessions, and it can only transport 5GSM messages.
Option 3: The purpose of the NAS transport procedures is to provide a transport of payload between the UE and the AMF, and it can transport various types of payloads, including 5GSM messages, SMS, LPP messages, SLPP messages, and more.
Option 4: The purpose of the NAS transport procedures is to update UE parameters, and it can only transport UE policy containers.
Explanation: The correct answer is Option 3 because the NAS transport procedures are designed to provide a transport of payload between the UE and the AMF, and they can transport various types of payloads, including but not limited to 5GSM messages, SMS, LPP messages, SLPP messages, SOR transparent containers, UE policy containers, location services messages, CIoT user data containers, Service-level-AA containers, UPP-CMI containers, and multiple payloads. This is stated in the paragraph extracted from the 3GPP TS 24.501 specification.