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It has been over 16 years since Cisco's NetFlow was patented in 1996. Extensive research has been conducted since then and many applications have been developed. In this survey, we have reviewed an extensive number of studies with emphasis on network flow applications. First, we provide a brief introduction to sFlow, NetFlow and network traffic analysis. Then, we review the state of the art in the field by presenting the main perspectives and methodologies. Our analysis has revealed thatdoi:10.1016/j.jnca.2012.12.020 fatcat:vn3hxplegbeg5lnyqmb5utvulu