Question: What is the primary purpose of the CN Invoke Trace procedure in the context of UTRAN Iu interface RANAP signalling, when distinguished by activation type?
Option 1: To establish a new Iu connection for tracing between the RNC and UE.
Option 2: To inform the RNC to initiate a trace session with specified parameters for the UE, or provide UE equipment identity for trace recording, depending on the activation method (signalling-based or management-based).
Option 3: To terminate an ongoing trace session due to CN request for resource reallocation.
Option 4: To modify existing QoS settings for a UE's Iu connection to prioritize trace data.
Explanation: This option correctly captures the dual-purpose nature of the CN Invoke Trace procedure, highlighting its role in both signalling-based activation (initiating a trace session with specified parameters) and management-based activation (providing UE equipment identity for trace recording).