Question: In a Generic Bootstrapping Architecture (Bootstrap) context, after a successful GBA_U procedure initiated by an ISIM Service, what two fields must the Terminal update in the EFGBABP (GBA Bootstrap Parameters) file?
Option 1: B-TID field and Key Life Time field
Option 2: ISIM Service Number field and Authentication Protocol field
Option 3: Bootstrapping Mode Indicator field and GBA_U Procedure Status field
Option 4: Terminal Identifier field and ISIM Application Version field
Explanation: In the context of Generic Bootstrapping Architecture, specifically after a successful GBA_U procedure which is part of the bootstrapping process for secure authentication and key exchange, the Terminal (e.g., a mobile device) needs to update specific parameters to reflect the new security context. The B-TID (Bootstrapping Transaction Identifier) field requires updating to acknowledge the new transaction, and the Key Life Time field needs updating to reflect the validity duration of the newly established keys. This ensures the Terminal and the network are synchronized in terms of security credentials and their lifespan, facilitating secure subsequent communications.