Network packet generator(NPG) is a tool used to construct and send packets, the purpose is to help the developers of network easily constructed test data, NPG currently supports several common protocols, including arp, rarp, icmp, raw udp, udp, tcp, netflow v5, dns, http
NPG's feature is by modifying the configuration file can support a variety of packet formats
Download and Install WinPcap from http://www.winpcap.org/install/default.htm
a. Download npg_windows_32.zip
b. Unzip npg_windows_32.zip file
c. Enter the the npg directory and double-click npg.exe