This MIB module defines objects that describe the quality metrics of Media streams. GLOSSARY ============ Flow Monitor - a hardware or software entity that classifies traffic flows, collects flow data, and periodically computes flow metrics. Flow Metric - a measurement that reflects the quality of a traffic flow. Measurement Interval - the length of time over which a flow monitor collects data related to a traffic flow, after which the flow monitor computes flow metrics using the collected data. Traffic Flow - a unidirectional stream of packets conforming to a classifier. For example, packets having a particular source IP address, destination IP address, protocol type, source port number, and destination port number. Traffic Flow Stream - when the monitor identifies multiple individual traffic flows based on the flow classificiation, the monitor aggregates the flows and represents them as a single entry in the cfmFlowTable. The individual traffic flows contributing to the metrics are called as individual traffic flow stream. The metrics for the traffic flow with multiple streams contributing, are determined either by aggregating metrics of all individual streams, for example, cumulative bit rate is computed by cumulative bits of all streams divided by total duration, or by selecting the metric for one of the individual stream, for example, maximum bit rate of an individual stream.