Question: In a Core Network (CN) Packet Switched (PS) domain, what is the primary method for obtaining the 'Max number of subscribers with activated PDP context and direct tunnel' measurement?
Option 1: Continuous monitoring of all subscriber activities in both RAN and GGSN.
Option 2: Sampling at a pre-defined interval the number of subscribers with an activated PDP context in SGSN that has established a direct tunnel between RAN and GGSN.
Option 3: Aggregating subscriber data from multiple SGSNs at irregular intervals to estimate the maximum.
Option 4: Manually counting subscribers with active PDP contexts during peak hours.
Explanation: This is correct because the measurement is obtained by sampling at a pre-defined interval the number of subscribers having an activated PDP context in SGSN which has established direct tunnel between RAN (Radio Access Network) and GGSN (Gateway GPRS Support Node), and then taking the maximum. This method allows for efficient and accurate tracking of the maximum number of subscribers with activated PDP contexts and direct tunnels without requiring continuous, real-time monitoring of all network activities.