Question: What is the requirement for a UE after a 5G to UTRAN Single Radio Voice Call Continuity (SRVCC) session has terminated?
Option 1: The UE can immediately access 5G services without any additional authentication.
Option 2: The UE must perform a successfully (re)authentication in UTRAN before accessing 5G services.
Option 3: The UE is not allowed to access 5G services until it has completed a specific timer period.
Option 4: The UE shall run a successfully (re)authentication in 5GS before being allowed to access 5G.
Explanation: After a 5G to UTRAN SRVCC session has terminated, the UE must perform a successful re-authentication in the 5G System (5GS) before it is allowed to access 5G services again. This ensures that the UE's credentials are validated and its security context is updated before accessing the 5G network.