Question: What is the primary purpose of the Nnef_ECSAddress_Update service operation in the 5G System (5GS)?
Option 1: To retrieve ECS Address Configuration Information from the NF producer.
Option 2: To delete existing ECS Address Configuration Information.
Option 3: To create new AF-service-identifier for External Group Identifier.
Option 4: To update ECS Address Configuration Information in the NF producer.
Explanation: The Nnef_ECSAddress_Update service operation is used by the NF consumer to request an update of the ECS Address Configuration Information. This operation allows the NF consumer to modify existing configuration information, which is a critical function in managing network resources and services.