Question: What is the primary purpose of the Nnef_ECSAddress_Delete service operation in the 5G System (5GS)?
Option 1: To update ECS Address Configuration Information.
Option 2: To retrieve AF-identifier and S-NSSAI information.
Option 3: To delete ECS Address Configuration Information requested by the NF consumer.
Option 4: To add new External Group Identifier.
Explanation: The Nnef_ECSAddress_Delete service operation is used to delete ECS Address Configuration Information, as indicated in the description of the service operation. This operation is initiated by the NF consumer and requires specific inputs, such as AF-identifier or S-NSSAI and DNN, to identify the configuration information to be deleted.