Question: In a Universal Subscriber Identity Module (USIM) application, during the Bootstrapping Mode of GBA (Generic Bootstrapping Architecture) security context, how is the response parameter coded in case of a synchronization failure?
Option 1: RES (Response) as for GSM Security Context
Option 2: AUTS (Authentication Token) as for LTE Security Context
Option 3: AUTS (Authentication Token) as for UMTS Security Context
Option 4: RES (Response) as for CDMA Security Context
Explanation: In the context of USIM and GBA's Bootstrapping Mode, when a synchronization failure occurs, the response parameter is specifically coded as AUTS (Authentication Token), following the format defined for UMTS Security Context. This ensures compatibility and secure communication within standardized network architectures, highlighting the importance of standardized security protocols in telecom networks.