Question: What is the primary purpose of the SnDeregistration service in the context of interworking between Home Subscriber Server (HSS) and Unified Data Management (UDM) in a 5G System?
Option 1: To trigger cancellation of previously registered serving nodes due to Inter-Radio Access Technology (IRAT) mobility.
Option 2: To facilitate handovers between different Radio Access Networks (RANs) without changing the serving node.
Option 3: To update subscriber data in response to changes in the Unified Data Management repository.
Option 4: To establish a new serving node for a User Equipment (UE) during initial network attachment.
Explanation: The SnDeregistration service's primary purpose is to deregister previous serving nodes due to Inter-Radio Access Technology (IRAT) mobility, ensuring network efficiency and data consistency across UDM and HSS for seamless service continuity and accurate subscriber data management.