NetFlow is a network IP accounting technology designed by Cisco Systems to provide deep visibility into network traffic flows. Every IP connection that occurs across a router's backplane will generate a small bit of information that is sent across the network to a device called a Flow Collector.
The following exercise estimates Flows per Second (FPS), the rate at which flows leave the router or switch and are destined for the Flow Collector. When sizing a Flow Collection vendor, the FPS rate is often used to determine how much storage, RAM, and CPU is required.
Select either Host Types or Traffic Types as the basis for your calculation.