Question: What are the input parameters used for deriving KAMF' from KAMF during mobility, specifically for the values of P1 and L1?
Option 1: P1 = DIRECTION, L1 = length of DIRECTION (i.e., 0x00 0x01)
Option 2: P1 = COUNT, L1 = length of COUNT (i.e., 0x00 0x02)
Option 3: P1 = FC, L1 = length of FC (i.e., 0x00 0x04)
Option 4: P1 = COUNT, L1 = length of COUNT (i.e., 0x00 0x04)
Explanation: According to the specifications for deriving KAMF' from KAMF during mobility, the input parameters include FC = 0x72, P0 = DIRECTION, L0 = length of DIRECTION (i.e., 0x00 0x01), P1 = COUNT, and L1 = length of COUNT (i.e., 0x00 0x04). Therefore, the correct answer is Option 4.