iperf: Iperf (TCP and UDP bandwidth tester) iperf: iperf: Iperf was developed by NLANR/DAST as a modern alternative for iperf: measuring maximum TCP and UDP bandwidth performance. Iperf allows iperf: the tuning of various parameters and UDP characteristics. Iperf iperf: reports bandwidth, delay jitter, datagram loss. iperf: iperf: iperf: iperf: iperf: