Everyone knows how to use speedtest.net to test your internet connection speed, but how do you test your LAN bandwidth?   When you want to troubleshoot speed issues on your LAN, what can you use? Luckily, some clever software call iperf3 can help us out.  You can find the tool at the main website for iperf and iperf3  here. This tool is available for Windows, Linux, Mac, Android, and iOS, so you’ve got options. There are two parts to testing your network with iperf3. First…