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3.3. NPAP Dataflow and Block Diagram The following shows the dataflow view of an exemplary design integrating NPAP with one UDP core and multiple TCP cores (3 for user-level plus 2 for Netperf), each with an example user application, plus Netperf (for bandwidth and latency benchmarking), plus network impairment (for Bit Error Rate Testing), plus diagnostics counters: The example user applications serve as an example on how to send and/or receive data from programmable logic via TCP/UDP/IPv4. For TCP this logic is inside one (or more) TCP Wrappers which contain HDL code for handling the control and data flow: TCA – the TCP Command Application to open/close a TCP connection TDA – the TCP Demo Application which uses the TCA to control the TCP session and can forward data to and from external applications such as the DGC DGC – a Data Generator and Checker which can generate payload data for sending and at the same time can check received payload data Similarly, for UDP this logic is inside the one (or more) UDP Wrappers which contain HDL code for handling the control and data flow: UDA – the UDP Demo Application which handles the control and data flow for one UDP port DGC – a Data Generator and Checker which can