Question: When an MC (Mission Critical) service server requests unicast resources at session establishment in a 5G System, how can QoS (Quality of Service) characteristics for resources be exchanged?
Option 1: Directly via the N5 reference point or Rx reference point from the MC service server to the PCF (Policy Control Function), and indirectly via the N33 reference point between the MC service server and NEF (Network Exposure Function).
Option 2: Only directly through the N5 reference point, with no indirect method available for QoS characteristic exchange.
Option 3: Solely through the N33 reference point, bypassing direct communication with the PCF.
Option 4: Via a dedicated Mission Critical specific reference point not mentioned in other options.
Explanation: This option correctly identifies both the direct (via N5 or Rx to PCF) and indirect (via N33 to NEF) methods by which QoS characteristics can be exchanged when an MC service server requests resources, reflecting a nuanced understanding of the flexibility in communication resource requests for Mission Critical services over 5G Systems.