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How to test your home internet connection speed
Testing your internet connection’s performance is a straightforward exercise. You don’t need any extra software—all you need is a computer with a web browser. But there are also a few things you can do to make sure you are getting the most accurate reading of your internet connection. Here’s what to do.
For best results, you want to use a wired connection if at all possible; that way, you don’t have to worry about interference and performance fluctuations that can occur while you’re on Wi-Fi. If you have any other wired devices on your home network, plug your test computer directly into the modem so those don’t interfere in your testing.
Click the Network column in Windows Task Manager to see which apps, if any, are sending/receiving data on your network.
If you’re stuck using Wi-Fi—say, you have a MacBook Air or a tablet or some other device that doesn’t have an ethernet port—do what you can to minimize interference. Make sure your Wi-Fi router is away from other electronic devices like cordless phones, and temporarily disconnect any other devices from your Wi-Fi network—after all, you don’t want another computer on your network to download a gigabyte worth of software updates while you run your tests.
While you’re at it, double-check to make sure your computer isn’t downloading something in the background. Check the Task Manager on Windows (summoned by pressing control-alt-delete) or Activity Monitor on MacOS, and look for network statistics (it’s labelled “Network”on MacOS, “Networking” on Windows).
Close or quit all apps on your computer to keep apps from downloading software updates while you test your connection. Your bandwidth usage may not drop to zero and stay there, but you want it as close to zero as it’ll get. If your operating system is downloading updates, there isn’t much you can do aside from wait and test your connection later.
If you’re having any problems with your connection, now is a good idea to reset your modem and router. Switch them off and unplug them for a few moments, then plug them back in and switch them on.
Test your connection
Speed of Me
Speedof.me is an HTML 5-based bandwidth graph that doesn’t rely on Adobe Flash.
All you have to do at this point is click the green “Begin Test” button, and Speedtest.net will check both your download and upload speed. This may take anywhere from a few seconds to a few minutes, depending on your network speed.
Those aren’t your only options for testing your broadband connection; MegaPath also offers a speed test, as well as what it calls Speed Test Plus, which evaluates the quality of your connection in addition to its raw speed. Your ISP might also offer a speed test tool, though you may need to do a little poking around for it. And router manufacturers are increasingly including speed tests in their products’ firmware and/or the mobile apps they distribute with their products (although in that latter case, you’ll be using a wireless connection).
Isolate the problem
Many router manufacturers include broadband speed-test utilities in the router's firmware and/or in the mobile apps that ship alongside them.
Don’t be surprised if you’re not getting the top speed your ISP says it can deliver—almost no one does. But if your connection is significantly slower than what was promised, many different factors could be coming into play. There might be a problem with your equipment, or it could be an issue on your ISP’s end. Most ISPs maintain a tech-support page where you can go to see if they're aware of any problems with their service. This link will take you to the location of AT&T's DSL troubleshooter.
If your ISP isn't reporting a problem, you can start your own troubleshooting by eliminating your equipment as a factor. First try using a different computer. If you get acceptable performance on the second machine, you can't blame the ISP. If the second computer also has a slow internet connection, run another bandwidth test after each of these suggestions: Try using a different ethernet cable to connect your PC to your router. Try swapping out the cable that connects your router to your internet gateway (your DSL, fiber, or cable modem). Troubleshoot your router: Turn it off or unplug it for a minute or two and then turn it back on. You should always be running the latest firmware on your router, so this is a good time to update it if you haven't lately. If you're still not seeing an improvement, try power-cycling your DSL, cable, or fiber modem.
If you've jumped through all of those hoops, and you're still have performance issues, it's time to call your ISP's tech-support line.
CR : https://www.pcworld.com/article/2048594/network-router/how-to-test-your-home-internet-connection-speed.html