Question: What triggers the increment of the 'Number of successful NF service updates' measurement at the Network Repository Function (NRF) in a 5G network?
Option 1: Receipt of an Nnrf_NFManagement_NFUpdate Request message from a Network Function (NF)
Option 2: Successful registration of a new NF with the NRF
Option 3: Periodic synchronization between NRF and NFs
Option 4: Transmission by the NRF of an Nnrf_NFManagement_NFUpdate Response message indicating a successful NF service update
Explanation: The correct answer is tied to the specific event that increments this measurement. According to telecom principles, the measurement for successful updates would logically increment upon confirmation of a successful update, which is typically signaled through a response message. Thus, the transmission of an Nnrf_NFManagement_NFUpdate Response message by the NRF, indicating a successful NF service update, directly correlates with the concept of confirming and therefore counting a successful update.