Question: What is the primary purpose of APN Rate Control in the context of CIoT optimization for controlling user data rates sent to and from a Mobile Station (MS)?
Option 1: To enforce a minimum Quality of Service (QoS) for all subscribers across the network.
Option 2: To dynamically adjust radio resource allocation based on real-time network congestion.
Option 3: To enable Home PLMN operators to offer services with specific data volume limits (e.g., 'maximum of Y messages per day').
Option 4: To prioritize traffic for mission-critical communications over other types of data transmissions.
Explanation: APN Rate Control facilitates offering customized services by Home PLMN operators with specific limitations on data usage (e.g., a defined number of messages per day), contrasting with Aggregate Maximum Bit Rate mechanisms which control overall bit rates rather than precise data volume limits, useful in CIoT optimization for efficient resource management.