Speed testing helps you quickly determine how fast your Internet is. ISPs promise "up to" a certain speed under optimal conditions, but a speed test confirms how fast ̵
What is a speed test?
An Internet speed test is the best way to get an idea of how fast your connection is. The service you connect to often limits your download and upload speeds, based on your chosen plan, local congestion, throttling rules, and more.
The catch is the promises your Internet service provider ( ISP) almost always Add the phrase "up to". This gives ISP leeway – if you've promised to reach "up to 30 Mbps" and you only get 28 Mbps, the company can say it keeps its promise. However, if you see 10 Mbps you will not get what you pay for, and it's time to call your ISP.
A speed test measures your ping and the download and upload speed. Measuring the latter two is important because most ISPs make separate promises for download and upload speeds. Usually, the download speed plays an important role. However, if you study the details in detail, the ISP will typically report a slower upload speed for each layer. For example, our local ISP is offering a plan with a download speed of 500 Mbps, but an upload speed of 125 Mbps.
How a Speed Test Works
When you start a speed test, you experience several issues: First, the client determines your location and the nearest test server, which is important For example, Ookla's Speedtest.net offer the ability to change the server, and if the test server is set up, the speed test sends a simple ping to the server and the server responds.The test measures this roundtrip in milliseconds.
After the ping is completed, the download test begins The client opens multiple connections to the server and tries to download a small piece of data. At this point, two things are measured: how long it took to retrieve the data fragment, and how much network resources it consumed.
When the client detects that you have free space, additional connections to the server open and download more data. The general idea is to tax your internet connection and see how much it can afford at the same time.
Think of your Internet service as a highway with a speed limit. Opening additional connections is equivalent to adding more lanes to the highway. The speed limit has not changed, but more cars can drive faster through the same space. In this way, the 50th car arrives earlier on a four-lane highway than on a two-lane highway.
Once the customer finds the right connections to test your Internet service, he downloads additional data blocks and measures the amount and download speed downloaded in the specified time.
Next up is the upload test. This is essentially the same process as the download test, but in the reverse order. Instead of dragging data from the server to your PC, the client uploads data from your PC to the server.
For more technical information, see the Speedtest.net explanation of how it works.