Which statement correctly describes Class of Service (CoS) routing?

Class of Service (CoS) routing is designed to manage network traffic by classifying packets according to their service category, allowing for differentiated treatment based on the nature of the traffic. This approach is critical in quality of service (QoS) implementations, where certain types of data, like voice or video, may require low latency and high priority. By utilizing CoS, routers can determine how to treat packets differently, ensuring that high-priority traffic is forwarded through the network with the appropriate level of service, enhancing performance for applications that are sensitive to delays.

This focus on prioritizing packets according to their service category distinguishes CoS from other routing mechanisms that might rely strictly on packet size, destination address, or general traffic flow analysis. While destination address-based routing is a fundamental aspect of IP routing, and traffic flow analysis can contribute to optimizing network performance, these methods do not specifically classify and prioritize data according to preset service levels like CoS does.