Question: What is the primary purpose of the RRC-TransactionIdentifier Information Element in Radio Resource Control (RRC) protocol, and what is its defined value range?
Option 1: To authenticate User Equipment (UE), with a defined value range of (4..7)
Option 2: To identify an RRC procedure (transaction) jointly with the message type, but only for handover procedures
Option 3: To prioritize RRC messages, with possible values being (8..15)
Option 4: To identify an RRC procedure (transaction) together with the message type, with a defined value range of (0..3)
Explanation: The correct answer is Option 4 because, as per the provided context from the 3GPP TS specification, the RRC-TransactionIdentifier is explicitly used for identifying an RRC procedure (or transaction) in conjunction with the message type. Moreover, its value range is specified as INTEGER (0..3), aligning perfectly with this option. This highlights the importance of precise identification in managing multiple RRC procedures efficiently within a telecom network.