Question: What is the primary purpose of the HS-DSCH FDD Secondary Serving Information Response in UTRAN's Iub interface Node B Application Part (NBAP) signalling?
Option 1: To initiate the setup of a new Primary Serving HS-DSCH cell.
Option 2: To request additional resources for existing Primary Serving Cells.
Option 3: To provide updates or modifications for established Secondary Serving HS-DSCH cells, including additional determined information within Node B.
Option 4: To acknowledge the release of an HS-DSCH configuration in a serving cell.
Explanation: The correct answer is Option 3 because the HS-DSCH FDD Secondary Serving Information Response updates or modifies established Secondary Serving HS-DSCH configurations, conveying additional determined information by Node B, optimizing existing secondary serving cells' high-speed downlink shared channel (HS-DSCH) settings within the UTRAN network.