Question: What is the primary purpose of the key set identifier (KSIASME) allocated by the MME during EPS AKA authentication in a 5G network?
Option 1: To enable secure communication between the UE and multiple MMEs simultaneously.
Option 2: To allow the UE and MME to identify and reuse a native KASME without invoking the full authentication procedure during subsequent connection setups.
Option 3: To differentiate between EPS and UMTS security contexts stored in the UE.
Option 4: To secure the transmission of the temporary identifier GUTI.
Explanation: The correct answer highlights the key benefit of KSIASME. By identifying a native KASME, both the User Equipment (UE) and the Mobility Management Entity (MME) can efficiently reuse previously derived keys for subsequent connections, streamlining the authentication process without compromising security.