|You can use a utility called iPerf - iPerf - The ultimate speed test tool for TCP, UDP and SCTP[^]
To run iPerf as a server on 1 Machine, open a command prompt(Administrator mode), navigate to the directory where you extracted iPerf, and run the following command, this starts iPerf in server mode, waiting for connections from the client machine -
Now run iPerf as a client on your other LAN machine, open a command prompt, navigate to the directory where you extracted iPerf, and run the following command -
iperf -c <your-server-IP-address>
This will give you a connection result in bps.