<FONT face=Verdana>Currently

P2P-based applications

prevailing over internet

become one of the greatest internet network-bandwidth consumers. So

It's indispensable to reduce the network bandwidth consume of P2P application

especially of P2P media streaming. This paper proposes a fast-inferring method based on network tomography in order to limit the traffic in smaller network

to decrease network-cross traffic and backbone network-bandwidth consume internally

and to suppress the congestions. The simulation shows that such technique can adapt the high dynamics of P2P media streaming system

and effectively slow down the network-cross traffic and backbone network-bandwidth consume.