Question: Who can initiate resource reservation requests for media parameters negotiated over Session Description Protocol (SDP) in a 5G Context, according to IMS requirements?
Option 1: Only the User Equipment (UE)
Option 2: Both the UE and the 5G Core Network (5GC), but network initiation is mandatory for IMS-specific QoS flows
Option 3: Only the 5G Core Network (5GC)
Option 4: Either the UE or the 5GC, with no specific constraints for IMS
Explanation: This option correctly captures the nuance that while both the UE and 5GC can initiate resource reservation requests in general 5G contexts, the IMS specifically requires the network (i.e., the 5GC) to initiate establishment, modification, and termination of QoS flows triggered by negotiated SDP, highlighting the importance of understanding the interplay between 5G system procedures and IMS-specific requirements for managing Quality of Service (QoS) in multimedia communications.