Question: What is the primary purpose of the Nnef_ECSAddress service in the V-NEF?
Option 1: To provide functions for UE authentication and authorization.
Option 2: To manage the configuration of network slicing for a group of UEs.
Option 3: To provide ECS Address Configuration Information to support HR-SBO, where the ECS Address is not associated with the subscription of an user of the PLMN operating the V-NEF and V-SMF.
Option 4: To handle the mobility management of UEs within a PLMN.
Explanation: The Nnef_ECSAddress service in the V-NEF is primarily used to provide ECS Address Configuration Information for a group of UEs or any UE from AF, and to support HR-SBO (Home Routed Shortest Path Bridging Optimization) where the ECS Address is not associated with the subscription of an user of the PLMN operating the V-NEF and V-SMF. This service enables the V-NEF to provide the necessary configuration information to the V-SMF, which in turn supports HR-SBO.