Question: For the 'Number of octets of incoming IP data packets on the Gi interface' measurement in a Core Network (CN) Packet Switched (PS) domain, how are the measurement subcounters typically organized?
Option 1: By Source IP Address
Option 2: By Destination Port Number
Option 3: By Traffic Class of the related PDP context
Option 4: By Protocol Type (e.g., TCP, UDP, ICMP)
Explanation: This organization by traffic class is crucial for differentiated Quality of Service (QoS) management in telecom networks. It allows for separate tracking of data volumes for different service classes, essential for both vendor performance modeling and operator traffic engineering to ensure optimal network resource allocation and QoS delivery.