Question: How is CHV2 handled in terms of scope in a mobile device when operating in 3G mode compared to 2G mode?
Option 1: In both 2G and 3G modes, CHV2 is considered local to the USIM application.
Option 2: The scope of CHV2 changes from being specific to the SIM application in 2G to being global in 3G.
Option 3: CHV2 is only applicable in 3G mode and has no equivalent in 2G operations.
Option 4: In 2G operation mode, CHV2 is considered global, whereas in 3G operation mode, it is seen as local to the USIM application.
Explanation: This question assesses understanding of how security protocols adapt between different network generations. The correct answer highlights a nuanced difference in how CHV2 is perceived by the system depending on the operational mode (global in 2G vs. local in 3G), crucial for ensuring compatibility and security across various network types.