Question: Which of the following best describes the primary purpose of the 'Information Exchange Termination' procedure in UTRAN's Iur interface, as initiated by a Radio Network Controller (RNC)?
Option 1: To establish a new signalling bearer connection for inter-RNC communication.
Option 2: To modify existing QoS parameters for ongoing information exchanges between RNCs.
Option 3: To request additional resources from a distant RNC for an existing information exchange.
Option 4: To terminate an ongoing information exchange previously initiated by the Information Exchange Initiation procedure.
Explanation: The correct answer, Option 4, aligns with the described purpose of the 'Information Exchange Termination' procedure. This procedure is specifically used to end an information exchange that was started using the 'Information Exchange Initiation' process, highlighting its role in managing and concluding established communication sessions between RNCs efficiently.