Question: In a GBA Bootstrapping procedure, what is the primary purpose of the 'Random challenge' field within the AKA Random challenge content?
Option 1: To authenticate the User Equipment (UE) for voice call setup
Option 2: To initiate secure bootstrapping for deriving GBA_U keys in the Generic Bootstrapping Architecture (GBA)
Option 3: To encrypt data transmissions over the Radio Access Network (RAN)
Option 4: To manage Quality of Service (QoS) parameters for IP Multimedia Services
Explanation: The Random challenge field is crucial for initiating a secure bootstrapping process, fundamental in the Generic Bootstrapping Architecture (GBA) for deriving GBA_U keys, used to authenticate and secure subsequent communications.