Question: Which 5QI value is utilized for a QoS flow of an MCPTT voice call, as well as for MCPTT-4/MCPTT-9 reference point signalling in a 5GS environment?
Option 1: 5QI value 55, ensuring low latency for critical communications
Option 2: 5QI value 70, reserved for future mission-critical service enhancements
Option 3: 5QI value 60, standard for all multicast/broadcast services in 5G
Option 4: 5QI value 65, as specified for MCPTT voice calls and related signalling
Explanation: The correct answer is Option 4 because, according to the specifications for Mission Critical services over 5G Systems, a QoS flow for an MCPTT (Mission Critical Push To Talk) voice call and its associated signalling must utilize the 5QI value 65, ensuring these critical communications are allocated the appropriate Quality of Service (QoS) within the 5G System architecture.