Diffserv QoS uses what type of tags?

Diffserv Quality of Service (QoS) utilizes Differentiated Services Code Point (DSCP) tags to manage network traffic and provide varying levels of service quality. DSCP is a field in the header of an IP packet that indicates the desired level of service for that packet. The DSCP value helps routers and switches make intelligent decisions about how to treat the packets as they traverse the network, allowing for prioritization of traffic based on application needs or service agreements.

This tagging mechanism is crucial for applications that require a certain bandwidth or lower latency, as it allows network devices to identify and process packets according to their specific QoS requirements. By marking packets with DSCP values, network operators can effectively differentiate between different types of traffic, ensuring that critical applications receive the necessary resources to function optimally.

The other types of tags listed serve different purposes. VLAN tags are used for segmenting network traffic at the data link layer, while Ethernet frame tags are related to frame formatting and addressing rather than traffic management. IP tags are not a recognized term within the context of Differentiated Services. Overall, DSCP tags are specifically designed for the application of Diffserv QoS, making them the correct choice.