The important observation with these tests is to look for changes in the measurements. If you were to ask, “ Then…which test should I use ?” I would answer: “ Pick one and be consistent ”. According to my experience, the most reliable and accurate test is iPerf. ![]() In fact, both the server and the device ramp up the upload and download process. They do this because those values tend to be lower than the average. For example, some tests discard the first few seconds worth of measurements. This is because each speed test implementation might handle data and timing differently. In addition, if you try the same test on two different browsers you might also see discrepancies in the measurements. You will notice significant discrepancies in the bandwidth measurements they provide. Try to run all of the previous five tests on the same hosts and on the same network. The benefit of using iPerf is that you have the ability to customize many parameters that are not possible to customize with the HTML-based tests. In the following table, I have sorted all these tests with respect to how easy they are to use, with being the easiest, and iPerf the least easy. In addition, it can measure some other metrics as well such as latency and jitter. It’s pretty straightforward how all of these speed tests work: a device uploads and downloads a large file to a server, and based on how long it takes, it calculates the connection bandwidth. ![]() In this post, we’ll cover five of them, their different features and how they can be used in different scenarios. There are a dozen similar tests (with every major TelCo provider having their own speed test) and a number of free and paid mobile device apps available. There are many ways to do this, but the ‘quick and dirty’ way to test the network connection is to run a speed test – such as the one provided by Ookla. But you are still tasked with proving that, “It’s Not the Network.” If you have a few years’ experience in network troubleshooting, you know that when you receive a ticket from a user complaining about “slowness”, in most cases, it’s the user’s device or the application. Also, I presented this topic at the Wireless LAN Professionals conference in February 2018. TL DR: There are so many network speed tests available: Ookla,, NDT, iperf, … which one should you use? In this article, I’ll go over this.
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