Question: What factor determines whether a Bootstrapping Server Function (BSF) runs GBA_U or GBA_ME bootstrapping procedures in a Generic Authentication Architecture (GAA)?
Option 1: UICC capabilities, as indicated by subscription information.
Option 2: The type of User Equipment (UE) initiating the bootstrap procedure.
Option 3: Configuration settings predefined on the BSF itself.
Option 4: Real-time network congestion levels.
Explanation: The UICC capabilities, part of the user's subscription information, determine whether a BSF initiates GBA_U or GBA_ME. Different UICC capabilities may support or require specific bootstrapping procedures for secure and efficient authentication and authorization within telecom networks.