Question: What is the primary purpose of the Evolved Packet System (EPS) authentication and key agreement (AKA) procedure?
Option 1: To provide encryption keys for data transmission
Option 2: To authenticate the network to the user equipment (UE)
Option 3: To establish a secure connection between the UE and the serving gateway
Option 4: To provide mutual authentication between the user and the network, and to agree on a key KASME
Explanation: The EPS AKA procedure is designed to provide mutual authentication between the user and the network, ensuring that both parties are genuine and trustworthy. This process also establishes a shared secret key, KASME, which serves as the foundation for the EPS integrity protection and ciphering key hierarchy.