Question: In a 3G network, where is the event generated for both SMS-MO (Mobile Originated) and SMS-MT (Mobile Terminated) according to lawful interception architecture?
Option 1: In the Serving GPRS Support Node (SGSN) only for SMS-MO
Option 2: In the Short Message Service Centre (SMS-Centre) for both SMS-MO and SMS-MT
Option 3: In the 3G Serving GPRS Support Node (SGSN) for both SMS-MO and SMS-MT, dependent on national requirements
Option 4: In the Mobile Switching Centre (MSC) for all SMS types
Explanation: This is correct because, as per lawful interception architecture for 3G security, events for both Mobile Originated (SMS-MO) and Mobile Terminated (SMS-MT) Short Messages are generated within the 3G SGSN, contingent upon fulfilling specific conditions that can vary based on national requirements.