What term describes a policy that allows network devices to manage the flow of data to give priority to voice and video?

• A. Internet
• B. Intranet
• C. Extranet
• D. Quality of Service

Answer: (D)

Quality of Service is the policy that lets network devices manage the flow of data to prioritise voice and video. By classifying traffic (for example, marking voice and video packets), shaping and policing bandwidth, and using appropriate queuing (such as priority or weighted fairness), QoS reduces delay and jitter and ensures real-time communications get the bandwidth and responsiveness they need. The other terms describe network scope rather than a method for prioritizing traffic—Internet, intranet, and extranet refer to types of networks, not traffic-handling rules.