Question: What is the primary purpose of Control Plane Optimisation for 5GS CIoT in the context of small data transfer?
Option 1: To reduce latency in data transmission
Option 2: To increase the security of large data transfers
Option 3: To exchange small user data or SMS as payload of a NAS message in both uplink and downlink directions
Option 4: To optimize voice call setup procedures
Explanation: Control Plane Optimisation for 5GS CIoT is specifically designed to facilitate the efficient transfer of small amounts of data, such as SMS or user data, within the control plane. This optimization allows for the exchange of these small data packets as part of NAS messages in both uplink and downlink directions, ensuring secure and efficient communication between the UE and the AMF.