Quality of Service

• Different applications have different QoS. The QoS demands of a real time applications such as VoIP is different from the QoS of data file trasfer which is not real time and which can suffer latency without injury.
• Steve Casner, Internet QoS Data Point NANOG Jan 2005. Experiment on active ISP backbone SF to Wash DC Pop to POP 1 Mbps average rate, Result: 99.99% availability