Question: What is the primary purpose of the Service Capability Exposure Function (SCEF) in a 3GPP network?
Option 1: To manage policy and charging control for multimedia services
Option 2: To enhance security for User Equipment (UE) authentication
Option 3: To securely expose services and capabilities of 3GPP network interfaces to external parties
Option 4: To optimize packet data transmission over wireless networks
Explanation: The SCEF's primary role is to securely make the services and capabilities of a 3GPP network's interfaces accessible, facilitating safe interactions with external entities like packet data networks and applications.