Question: In a 5G network, what is the primary reason for measuring the Downlink (DL) PDCP SDU Drop rate in the gNB-CU-UP?
Option 1: To evaluate the effectiveness of traffic management and high traffic load handling on user-plane traffic.
Option 2: To assess the quality of the eUTRAN air interface for NR split bearer options.
Option 3: To monitor the performance of the F1-U, Xn-U, or X2-U interfaces exclusively.
Option 4: To analyze the impact of QoS levels on the control plane signaling.
Explanation: The measurement of DL PDCP SDU Drop rate in the gNB-CU-UP is primarily aimed at understanding how well the network handles high traffic loads and traffic management, specifically focusing on user-plane traffic (DTCH) and the drop rates due to these factors.