Question: What is the primary security requirement for setting up and configuring eNodeBs (eNBs) in a 3GPP network, particularly concerning local or remote access?
Option 1: Ensuring Quality of Service (QoS) for all connected User Equipment (UE)
Option 2: Implementing load balancing between adjacent eNBs over the X2 interface
Option 3: Conducting regular software updates without authorization for efficiency
Option 4: Authenticating and authorizing access to prevent unauthorized modification of eNB settings and software configurations
Explanation: This is correct because the primary security concern for eNB setup and configuration is preventing unauthorized access. Authenticating and authorizing all modifications to eNB settings and software configurations ensures the integrity and security of the network, protecting against potential attacks or malicious alterations.