Lanbench !full! -

LANBench is a free, open-source network benchmarking tool that allows users to measure the performance of their LANs in a comprehensive and accurate manner. Developed by a team of experienced network engineers, LANBench is designed to provide a detailed analysis of network performance, including metrics such as throughput, latency, packet loss, and jitter. The tool is highly customizable, allowing users to configure tests to suit their specific needs and network environments.

While originally developed by Zach Saw, you can find the utility on several reputable software repositories: CNET Download SmallNetBuilder's Network Tools LANBench