Question: What is the primary function of DeNB in relation to Relay Nodes (RNs) connected to it?
Option 1: To provide the necessary S/P-GW functions for RN operation, including IP address allocation and packet mapping.
Option 2: To manage mobility between different radio access technologies.
Option 3: To handle ECM-IDLE state transitions for RNs.
Option 4: To perform authentication and authorization for RNs.
Explanation: DeNB provides the necessary S/P-GW functions for the operation of RNs connected to it, including IP address allocation for the UE functionality of the RN and packet mapping between EPS bearers and DSCP values. This is essential for the Relay Function, which enables RNs to communicate with the core network through the DeNB.