Question: What is the primary purpose of the Transaction ID in UTRAN Iub interface NBAP signalling?
Option 1: To differentiate between common and dedicated procedures
Option 2: To identify the initiating protocol peer in a procedure
Option 3: To associate all messages belonging to the same procedure across parallel transactions
Option 4: To signify the priority level of a procedure within Node B/CRNC context
Explanation: The correct answer highlights the key role of Transaction ID: to link all messages of the same procedure together, ensuring procedural integrity and clarity amidst multiple concurrent procedures.