The third parameter, a byte, is the Quality of Service (QoS) for this publication. QoS has three legal values: 0, 1, or 2
Byte：第三个参数，是此发布的服务质量（Quality of Service，QoS）。
2
Besides bandwidth and latency, what other parameter is needed to give a good characterization of the quality of service offered by a network used for digitized voice traffic?
数字化的语音所经过的网络，除了对带宽和延迟有要求之外，还有什么参数影响它的服务质量？
3
Available bandwidth is a very important parameter to network path, it helps to improve network application program and servicequality.