Question: Where are the 5G NAS security context parameters stored if the corresponding file is not present on the Universal Subscriber Identity Module (USIM)?
Option 1: In the volatile memory of the Mobile Equipment (ME)
Option 2: In the non-volatile memory of the ME, along with the SUPI from the USIM
Option 3: Directly on the User Equipment's (UE) operating system
Option 4: Externally on a remote authentication server
Explanation: If the corresponding file for storing 5G NAS security context parameters is not present on the USIM, the parameters are stored in the non-volatile memory of the Mobile Equipment (ME) for persistence, including the SUPI from the USIM for authentication matching purposes, ensuring security and continuity of service across sessions.