Question: What is the primary purpose of the Nnef_DNAIMapping_UpdateNotify service operation in the 5G System (5GS)?
Option 1: To request DNAI - EAS address(es) mapping information from NF consumer.
Option 2: To notify NF consumer about the update of DNAI - EAS address(es) mapping information.
Option 3: To provide Cause information to NF consumer.
Option 4: To retrieve one or more pairs of DNAI(s) and EAS address(es).
Explanation: The Nnef_DNAIMapping_UpdateNotify service operation is used by the NEF to notify NF consumer about the update of DNAI - EAS address(es) mapping information, which is essential for maintaining accurate and up-to-date mapping information in the 5GS network.