Question: What happens to data transfer for a specific PDP address when all its associated PDP contexts are deactivated across the network elements (e.g., MS, SGSN, S-GW, P-GW, GGSN)?
Option 1: Data transfer for that PDP address remains enabled but with reduced bandwidth.
Option 2: Data transfer for that PDP address is disabled.
Option 3: The PDP address is automatically assigned a new TFT to maintain data transfer.
Option 4: All associated MM contexts for the subscriber's IMSI are also deactivated.
Explanation: According to the principles of PDP context management in GPRS, deactivating all PDP contexts linked to a specific PDP address results in disabling data transfer for that address. This is because each PDP context controls the data transfer capability for its associated PDP address and TFT (if assigned). With no active PDP context, the pathway for data transfer is effectively closed.