Final answer:
Data transfer cost is charged for types of traffic that require a larger amount of bandwidth and infrastructure. Companies may charge higher fees for data-heavy content in order to deliver it faster. These charges aim to ensure fair allocation of resources and maintain quality of service.
Step-by-step explanation:
Data transfer cost is charged for types of traffic that require a larger amount of bandwidth and infrastructure. Activities like video streaming, video calling, and file downloading typically consume more data and therefore incur higher charges. Companies providing broadband networks may charge higher fees for data-heavy content in order to deliver it faster to consumers. These charges aim to ensure a fair allocation of resources and maintain the quality of service.