Question: What is the primary purpose of the KM-PC5 reference point in the context of Service Enabler Architecture Layer for Verticals (SEAL)?
Option 1: To facilitate key management interactions between key management clients across different Vertical Application Layer (VAL) User Equipment (UEs)
Option 2: To enable direct communication between Proximity-based Service (ProSe) servers for vertical applications
Option 3: To manage Quality of Service (QoS) parameters for PC5 interface-based communications
Option 4: To authenticate Vertical Application Layer (VAL) services with the network infrastructure
Explanation: The correct answer is Option 1 because the KM-PC5 reference point is specifically defined to support interactions related to key management functions. This involves secure communication and exchange of cryptographic keys between different VAL UEs, which is crucial for maintaining security across vertical applications in a multi-UE scenario. This aligns with the role of key management in ensuring secure data transfer and authentication processes.