Question: What is the purpose of including the back-off timer value IE in the network's response?
Option 1: To indicate that the maximum number of EPS bearers has been reached.
Option 2: To request a minimum time interval before procedure retry is allowed when the ESM cause is not related to bearer management.
Option 3: To notify the UE that the network is busy and cannot process the request at this time.
Option 4: To inform the UE that the requested EPS bearer cannot be established due to insufficient resources.
Explanation: The back-off timer value IE is included in the network's response to request a minimum time interval before procedure retry is allowed, but only when the ESM cause is not #65 "maximum number of EPS bearers reached". This allows the UE to wait for a certain period of time before reattempting the procedure, preventing excessive retries and reducing network congestion.