Question: What is the primary outcome of Phase-1 in the IAB-node integration procedure?
Option 1: Establishment of BH RLC channels and routing update
Option 2: Registration of IAB-UE to the network and establishment of NAS and AS security between the IAB-node and 5GC
Option 3: Configuration of the IAB-node securely using established AS security
Option 4: Establishment of secure F1 interface between the IAB-donor and IAB-node
Explanation: The primary outcome of Phase-1 in the IAB-node integration procedure is the registration of the IAB-UE to the network, which results in the establishment of NAS and AS security between the IAB-node and 5GC. This is a critical step in securing the communication between the IAB-node and the 5G Core Network (5GC).