Question: What happens to a PDP context using streaming traffic class in an SGSN when its associated RAB is released, in architecture variants using Gn/Gp interaction with GGSN?
Option 1: The PDP context is preserved, but the maximum bit rate is downgraded to 0 kbit/s for both uplink and downlink.
Option 2: The PDP context is immediately deactivated by the SGSN without any modification.
Option 3: The PDP context's traffic class is changed to background or interactive before any other action.
Option 4: The SGSN sends a notification to the MS to manually deactivate the PDP context.
Explanation: When a RAB associated with a streaming (or conversational) traffic class PDP context is released, the SGSN preserves the PDP context but downgrades its maximum bit rate to 0 kbit/s for both uplink and downlink, effectively stopping packet transmission without deactivating it outright.