Question: In the context of Lawful Interception (LI) for X2-interface, what is the primary purpose of transferring 'encryption parameters' from the PDN-GW, ePDG, or HSS to the Delivery Function 2 (DF2)?
Option 1: To ensure Quality of Service (QoS) for intercepted communications.
Option 2: To enable the DF2 to decrypt intercepted Communication Content (CC) if necessary.
Option 3: To facilitate location-dependent interception by providing target location details.
Option 4: To correlate intercepted data with other network events and parameters.
Explanation: The transfer of encryption parameters, including keys and associated parameters, is crucial for the DF2 to decrypt the Communication Content (CC) if it is encrypted. This ensures that the intercepted content can be understood and utilized as intended by the lawful interception process, highlighting the importance of decryption in maintaining the integrity of the intercepted data.