Regarding network, QoS is a very important issue. IPv6 will be a mainstream of the network in the two or five years. It is very significant to do more research on IPv6 QoS, which will do good to the development and large-scale application of IPv6. We have introduced QoS mechanisms and two different approaches to QoS on the Internet, analyzed current status of IPv6 QoS and mainly discussed some important factors to implement QoS for IPv6.
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