How Does An Internet Speed Test Work? Though there are a variety of different internet speed tests available online, they all essentially operate in the same basic way. In essence, when you begin the test, our tool will upload a set of files from your network to the test server nearest your location. Run the speed test to see what your upload and download speed is. We recommend running the test multiple times to account for any fluctuations in speed that you may experience. Save on XFINITY Digital Cable TV, High Speed Internet and Home Phone Services. Enjoy entertainment your way with great deals on XFINITY by Comcast. Xfinity Speed Test was previously known as Comcast speed test, even now many people refer it with its old name. In 2011, it changed its name from Comcast to Xfinity Speed Test. It is a free web based internet speed testing service that has been providing accurate results from years.

Let's test your Internet speed. We will show you the download and. upload speeds from our speed test servers to your device.

This speed test checks the speed between your smartphone, tablet, computer, or other device and the internet. You can run the test through a cellular (mobile) network, a wired broadband connection, or your home Wi-Fi.

M-Lab conducts the test and publicly publishes all test results to promote internet research. Published information includes your IP address and test results, but doesn't include any other information about you as an internet user. Learn more about how the test works.

How to test your home network speed: Make sure the only thing connected to the internet is the device you’ll be testing. Disconnect all other devices connected to your network to avoid Wi-Fi congestion, even if they aren’t using internet. Go to the computer or device where you want to test your internet speed. If testing over Wi-Fi: The speed test tool checks various parameters upon initialization, and those factors are considered vital for Internet performance. The major factors which affect the speed of your net are jitter, latency, download speed, upload speed, and the distance between the remote server and your computer.