Question: In a 3G network utilizing Lawful Interception via the X3-interface, what is mandatory to be transferred from the 3G GSN to the Delivery Function for Lawful Interception (DF3) to ensure its functionality, excluding intercepted communication content?
Option 1: Target Location and Date/Time of Location
Option 2: Correlation Number and Direction (MO or MT)
Option 3: Target Identity and Correlation Number
Option 4: Time Stamp and IAs for Location Dependent Interception
Explanation: For the DF3 to perform its lawful interception functions effectively, identifying the target and correlating the intercepted data are crucial. The 'Target Identity' ensures the correct subject is being monitored, while the 'Correlation Number' helps in organizing and linking related intercepts over time, making these two pieces of information fundamental for the functionality of the DF3. While other options provide useful contextual information, they are either optional (Direction, Time Stamp) or dependent on specific scenarios (Target Location, IAs for location-dependent interception).