Question: What is the primary purpose of the Nnef_ECSAddress_Unsubscribe service operation in the 5G System?
Option 1: To explicitly unsubscribe notifications of changes to ECS Address Configuration Information.
Option 2: To subscribe to notifications of changes to ECS Address Configuration Information.
Option 3: To update the ECS Address Configuration Information.
Option 4: To retrieve the current ECS Address Configuration Information.
Explanation: The Nnef_ECSAddress_Unsubscribe service operation is used by NF consumers to explicitly unsubscribe from notifications of changes to ECS Address Configuration Information, as indicated in the description of the service operation. This allows NF consumers to stop receiving updates on changes to ECS address configurations.