Question: In trusted Non-3GPP IP access via S2a, where is Lawful Interception (LI) required in cases of non-roaming and roaming with local breakout within the 3GPP network?
Option 1: PDN-GW
Option 2: S-GW
Option 3: Both PDN-GW and S-GW depending on the roaming scenario
Option 4: HSS (Home Subscriber Server)
Explanation: According to specified functional requirements for Lawful Interception, in scenarios involving non-roaming and roaming with local breakout, interception is required at the PDN-GW. This highlights the critical role of the PDN-GW as a potential Intercept Control Element (ICE) in these specific network access cases, ensuring compliance with lawful interception mandates.