说明：  Iperf 是一个网络性能测试工具。Iperf可以测试最大TCP和UDP带宽性能。Iperf具有多种参数和UDP特性，可以根据需要调整。Iperf可以报告带宽，延迟抖动和数据包丢失。 iperf 分为两种版本，unix/linux版和windows版，unix/linux版更新比较快，版本最新。windows版更新慢。windows版的iperf叫jperf，或者xjperf。jperf是在iperf基础上开发了更好的UI和新的功能。
(Iperf is a network performance testing tools. Iperf can test the maximum TCP and UDP bandwidth performance. The Iperf have a wide range of parameters and UDP characteristics, can be adjusted. Iperf can report bandwidth, delay, jitter and packet loss. The iperf divided into two versions of unix/linux version and the version of windows, unix/linux version update faster latest version. windows update slow. windows version the the iperf call jperf, or xjperf. jperf iperf developed on the basis of a better UI and new features.)