Download iperf software from the official website.
For windows do the following for testing the speed:
- Open cmd and use cd command to reach to the directory where the iperf is installed
- Have two system one will act as client and one will act as server. You can use public server provided for testing so you only have to use a client. You can google for public server.
For client you should use “iperf3.exe -c <ip address of the server>”
For server you should use “iperf3.exe -s”