Question: In a 5G network, what is the composition of the transport network layer for the F1-U interface between the gNB-DU and gNB-CU or gNB-CU-UP?
Option 1: TCP/IP with GTP-C on top
Option 2: MPLS with SCTP and Diameter on top
Option 3: IP transport, with UDP and GTP-U on top of IP
Option 4: Ethernet with HTTP and RESTful APIs on top
Explanation: The correct answer reflects the specified composition for the F1-U interface's transport network layer in a 5G network context. Here, IP serves as the base, UDP is utilized for its efficiency in handling real-time data, and GTP-U is employed to tunnel user plane packets between the gNB-DU and gNB-CU or gNB-CU-UP, ensuring efficient and reliable transport of user data. This setup aligns with the requirements for low-latency and high-throughput communications in 5G networks.