<Tr> <Td> Non-real - time Polling Service </Td> <Td> nrtPS </Td> <Td> Delay - tolerant data streams comprising variable - sized data packets for which a minimum data rate is required </Td> <Td> FTP with guaranteed minimum throughput </Td> </Tr> <Tr> <Td> Best Effort </Td> <Td> BE </Td> <Td> Data streams for which no minimum service level is required and therefore may be handled on a space - available basis </Td> <Td> HTTP </Td> </Tr> <P> The BS and the SS use a service flow with an appropriate QoS class (plus other parameters, such as bandwidth and delay) to ensure that application data receives QoS treatment appropriate to the application . </P> <P> Because the IEEE only sets specifications but does not test equipment for compliance with them, the WiMAX Forum runs a certification program wherein members pay for certification . WiMAX certification by this group is intended to guarantee compliance with the standard and interoperability with equipment from other manufacturers . The mission of the Forum is to promote and certify compatibility and interoperability of broadband wireless products . </P>

Wimax is an implementation of which ieee committee