Iperf 2
A means to measure network responsiveness and throughput
Throughput testing, latency testing, jitter measurement, packet loss measurement, TCP testing, UDP testing, ECN testing, L4S testing, responsiveness testing, bounceback testing, one-way delay measurement, histogram reporting, multicast testing, IPv6 support, parallel streams, bidirectional testing, full-duplex testing, congestion-control testing, socket pacing, CSV output, embedded systems support
Current release: 2.2.2, June 15, 2026
About iperf 2 and iperf3: Read about the...