Question: What is the value of FC used when deriving a KAUSF from CK, IK, and the serving network name during 5G AKA?
Option 1: 0x00
Option 2: 0x6A
Option 3: 0xFF
Option 4: 0x01
Explanation: According to the specified parameters for forming the input S to the KDF, FC is set to 0x6A when deriving a KAUSF from CK, IK, and the serving network name during 5G AKA.