Question: In packet-oriented data services, when Lawful Interception (LI) is activated during an already established PDP context, which type of IRI record marks the start of the interception?
Option 1: IRI-END record
Option 2: IRI-CONTINUE record
Option 3: IRI-BEGIN record
Option 4: IRI-REPORT record
Explanation: According to telecom standards for Lawful Interception in packet-oriented data services, when LI is activated during an ongoing communication (i.e., an already established PDP context), an IRI-BEGIN record is used to mark the start of the interception. This ensures the Law Enforcement Agency receives a clear indication of when the interception commenced, even if it was not present from the initial setup of the communication.