How to Test Network Latency? For Windows users, you can test your Ping with a simple command in CMD or use a website such as speedtest.net or tool such as Traceroute for any other operating system. Run CMD Ping Loopback test The Ping loopback test will test your computer’s connection to verify that there are no local hardware problems causing the network or internet latency issue. Start by running CMD and Type “ Ping 127.0.0.1 -n 20”. This IP address is the same for nearly all built in network connections, the “-n 20” extension will send. 20 packets of data before terminating the test. If you forget to type “-n 20” you can cancel the test by entering