Question: What is the primary purpose of a RESET message sent from a Core Network (CN) node to a Radio Network Controller (RNC) in the UTRAN Iu interface?
Option 1: To establish new Radio Access Bearers for incoming traffic
Option 2: To release affected Radio Access Bearers and erase references due to loss of transaction reference information at the CN
Option 3: To initiate a software update in the RNC for enhanced functionality
Option 4: To request the RNC's current load and capacity for resource allocation planning
Explanation: The RESET message is sent to manage the aftermath of a CN failure resulting in lost transaction references, releasing impacted Radio Access Bearers and clearing related references at the UTRAN to ensure network stability and resource management.