This object identifies the class of service, such as control traffic, guaranteed expedited forwarding, or one of several assured-forwarding classes, that this queue is handling. Administrators use it to confirm which traffic class a specific hardware queue is dedicated to, important when auditing or troubleshooting QoS behavior. For example, confirming a queue reports class 'ef' would tell an engineer that queue is meant to carry latency-sensitive expedited-forwarding traffic such as voice.