Question: In an MCPTT (Mission Critical Push To Talk) system, when the IWF (InterWorking Function) floor control server receives a Floor Taken message with the G-bit set to '1' (indicating Dual Floor), what state does the floor control interface towards the MCPTT client remain in?
Option 1: U: not permitted and Floor Taken
Option 2: Override without Revoke state
Option 3: Floor Request Pending state
Option 4: U: permitted state
Explanation: According to the MCPTT media plane control specifications, when the IWF floor control server receives a Floor Taken message with the G-bit set to '1' (Dual Floor), it remains in the 'U: permitted' state. This ensures continuous permission for the participant's floor access under dual-floor conditions, highlighting the importance of nuanced state management in mission-critical communications.