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A ‘bit’ is eight times smaller than a ‘byte’. ‘Gigabytes’ (GB) and ‘Terabytes’ (TB) are other common examples. You may have heard of ‘megabytes’ (MB) before - this is the format used to describe how large a computer file or programme is. It refers to how many ‘megabits’ of data can be transferred to or from your device every second. ‘Mbps’ stands for ‘megabits per second’ - it’s the most common measurement used for broadband speeds.
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But what does that actually allow you to do? How fast can you download movies, albums or files? Let’s suppose you’ve tested your broadband and you’ve got a speed of 40Mbps. back to top How does the Uswitch broadband speed checker work? If you run a Wi-Fi speed test and find that your postcode can get much faster internet speeds, you might be able to improve your connection for a slightly - and very reasonably - higher monthly cost. You can also use the results to compare your broadband speed with other broadband deals that are available in your area.
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However, the results can come in useful if you’re complaining to your provider about your speed, thanks to Ofcom’s Voluntary Code of Practice on Broadband Speed which sets out a minimum continuous speed providers have to supply.
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Your first results should not be seen as a full measure of your broadband’s overall performance, so you might want to test it a few times at different points in the day to get a better overall reading. We’re always updating our broadband speed checker to be as accurate as possible, but you should know that the speed test results only represent a snapshot of your broadband connection at the time of testing.
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It can measure speeds for all types of broadband, including copper ADSL, fibre-optic, cable and mobile broadband, plus your mobile data speed if you’re out and about. Other examples of uploading are sending files, emails, video chat or messaging.The Uswitch Broadband Speed Test is a free service that tells you your current internet speed in seconds. Displaying the content of the web page uses your ‘download’ bandwidth to send the data (i.e text, image, videos, etc) of the new page to your screen hence why download bandwidth is (should) always be higher than upload. The web page then reacts by displaying the content of the link clicked. When you click a link on a web page your computer ‘uploads’ a small data signal (also known as a packet) to the website telling it that you have clicked on a link. The upload speed is how quick your internet broadband connection sends data up to web servers. Difference between download & Upload speed. The data is downloaded so that it can be displayed on your internet browser. web servers sending the content of web pages to your computer/device screen). Your internet download speed result will be higher than upload speed because the majority of internet activity consists more of downloading than uploading (e.g. This is a measure of how quick your broadband connection pulls data from online internet servers such as displaying web pages, watching videos and downloading files. What is the download speed?ĭownload speed is measured in megabits per second (Mbps). For optimal performance, jitter must not be over 15 milliseconds maximum or else there will be an impact on performance.

All internet connections experience a level of jitter and it is most visible and problematic for real-time applications such as online gaming, streaming and voice communications (e.g Skype). Jitter can be caused by a number of factors such as network congestion, signal interference and collisions. This is the delay between when a signal is transmitted and when it is received. Jitter is a delay during the transfer of data.

The lower the number the better the connection. The ping response tells you how fast you get a response back from a web server.
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That way you will rule out any WiFi issues or interference and it will be an even more accurate reading. For an even more refined test, connect to your broadband router using an Ethernet cable. The fewer applications you have running on your PC/device the better.
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How to improve the accuracy of the speed testĮnsure that you do not have any downloads or uploading taking place whilst you run the test.
