Question: What is the purpose of using FC = 0x7D, P0 = NAS Downlink COUNT value, and L0 = length of NAS Downlink COUNT value as input parameters for deriving KASME_SRVCC from KAMF?
Option 1: To authenticate the UE in a 5G network.
Option 2: To enable SRVCC from 5G to UTRAN CS.
Option 3: To encrypt data transmitted over the air interface.
Option 4: To authorize access to a specific service.
Explanation: The input parameters FC = 0x7D, P0 = NAS Downlink COUNT value, and L0 = length of NAS Downlink COUNT value are used specifically for deriving KASME_SRVCC from KAMF during SRVCC (Single Radio Voice Call Continuity) from a 5G network to a UTRAN CS (UTRAN Circuit Switched) network. This process is essential for ensuring seamless voice call continuity when the UE moves between different types of networks.