Question: What is the primary purpose of combining a CN-Id with a PLMN-Id in the context of RAN signaling over the Iu interface?
Option 1: To authenticate User Equipment (UE) during initial network attachment
Option 2: To prioritize traffic for specific applications using Quality of Service (QoS) parameters
Option 3: To globally identify a Core Network (CN) node in RANAP signaling
Option 4: To encrypt data transmitted between the CN and the Radio Access Network (RAN)
Explanation: The combination of CN-Id and PLMN-Id creates a unique global identifier for a Core Network node, crucial in RANAP signaling over the Iu interface to ensure correct routing of messages between the RAN and the intended CN node, highlighting the importance of unique identification in telecom networks.