Question: What is the typical cause code indicated in the DEACTIVATE PDP CONTEXT REQUEST message when the MS deactivates a PDP context due to insufficient resources?
Option 1: #25: LLC or SNDCP failure (A/Gb mode only)
Option 2: #26: insufficient resources
Option 3: #36: regular deactivation
Option 4: #37: QoS not accepted
Explanation: The correct answer is Option 2, as the cause code #26 specifically indicates "insufficient resources" as a reason for PDP context deactivation. This aligns with the scenario where the MS deactivates a PDP context due to insufficient resources.