- Network speed depends on both technical factors and the device's environment.
- To get accurate results from a speed test, it's key to run it without interference.
- Knowing the latency, download speed, and upload speed is essential to assessing the performance of your connection.
If you've ever wondered why your internet connection seems slower than it should be, running a speed test can clear up any doubts. This test is a key tool for determining whether you're receiving exactly what you contracted with your provider, or if something is affecting your actual performance. Although it may seem like a simple task, the truth is that performing a proper measurement requires more preparation than many imagine.
In this article, you'll discover everything you need to know to run a reliable speed test from home, without interference or results manipulated by your environment. We'll explain how these tools work, what information they'll show you, and what factors you should control to ensure the results are relevant. If you want to stop browsing with questions, keep reading.
What is a network speed test and how does it work?
A speed test is a test that analyzes how your internet connection performs under controlled conditions. It uses servers strategically located at different points on the network to send and receive data from your device. This process allows for the precise measurement of parameters such as download speed , upload speed , and latency (more commonly known as ping).
The process begins by identifying your location to select the closest server. This is important because the closer the server, the lower the latency and the more accurate the results. The browser or app you're using then requests a small download from that server. The time it takes to complete this operation is measured, which translates into the download speed. The process is then reversed, and data is sent to the server to measure the upload speed.
Some tests may use different protocols for measurement, the most common being HTTP and TCP . HTTP is easier to implement, as it's the same protocol browsers use to access web pages, but it can be prone to errors with very fast connections. TCP, on the other hand, provides more stable results, although it's not always compatible, especially if firewalls are active.
What data does a speed test offer you?
The speed test not only tells you whether you have a good connection or not, but also breaks down different metrics that are key to understanding the quality of the service you're using. Here are the main ones:
Download speed
This is the most striking piece of information. It represents how quickly you can download files, load web pages, stream videos , or receive any content. A high download speed means smoother browsing. The result is usually shown in Mbps (megabits per second) and should be compared to your contracted speed. You can find out more about how to reduce your connection speed if the results are unsatisfactory.
Upload speed
This is the inverse measurement, that is, how long your connection takes to send data from your device to the internet. This parameter is vital if you frequently send large files, make video calls, or work in the cloud . Although traditionally less valued, its importance is greater with symmetrical connections (like modern fiber optics). If you're interested, you can find more information here about the features of the Poco F7 Ultra , a device that can affect your loading experience.
Latency (Ping)
This value is measured in milliseconds (ms) and represents the time it takes for a data packet to travel to and from the server. The lower the ping, the better. A high ping can cause delays in video calls or problems when playing online, generating the dreaded "lag." To avoid this, see methods on how to reduce ping on PC and consoles.
Jitter or fluctuation
In some more comprehensive tests, you'll also find this parameter, which measures response time variability . A network with high jitter can offer inconsistent performance, which is annoying for sensitive activities like streaming or real-time gaming .
Factors affecting test results
It wouldn't be worth doing a speed test if the environment negatively affects the results. There are key details to keep in mind to avoid interference:
Avoid other online activities
It's crucial that no other devices are using data during the test : no mobile phones downloading apps, no computers streaming videos, and no active automatic backups. All of these could skew the results, making you think your connection is slower than it actually is.
Close background apps
Especially if you're testing from a mobile device, remember to close all apps that use the internet, such as music or video services, social media, or even automatic updates. Any background process can consume bandwidth and skew the measurement.
Disable automatic syncs or downloads
Many computers may be downloading operating system updates, syncing files with the cloud, or performing scheduled tasks without your knowledge. Before starting the test, it's recommended to check and pause these actions from the Control Panel or Task Manager.
Router location and connection type
The distance to the router and the quality of the Wi-Fi signal also affect the results. Ideally, you should perform the test from a computer connected directly via Ethernet cable. If you're using Wi-Fi, position yourself as close as possible to the router and away from obstacles or electronic interference such as microwaves or cordless phones.
Number of connected devices
In homes with many devices connected simultaneously, it's likely that some of the bandwidth is being used. It's best to run the test at a time of day when there's minimal activity on your home network. You might also be interested in learning how to unblock a Wi-Fi network if you can't access your usual one.
How to perform a professional speed test
If you want more comprehensive and technical control, there are good practices to obtain the most realistic data possible:
- Use a wired computer connected to the router. This will prevent Wi-Fi-related losses.
- Perform several tests at different times of the dayThis can help you detect quality variations.
- Also test under normal usage conditions.. It's not just the maximum theoretical speed that matters, but how your network performs with multiple devices running.
- Write down the values obtained (ping, download, upload) and compare them with your contracted rate. If there's a significant difference, contact your provider.
Differences between operators and technologies
Depending on your provider or the type of technology you have installed at home (ADSL, HFC, FTTH Fiber, 5G...), actual speeds may differ significantly:
For example, if you have a 300 Mbps symmetrical fiber optic connection, you should get speeds very close to that figure for both download and upload. However, if you're connected via Wi-Fi with poor coverage or ADSL, the speeds can drop drastically, even below 50 Mbps. For more information on how technology affects your speed, check out this link about AI RAN.
Some operators like Digi and Finetwork offer very competitive speeds using their own networks or networks shared with other companies. Connections like Digi's can exceed 900 Mbps of real speed under optimal conditions. Even Finetwork, which uses Vodafone's network, guarantees 80% of the contracted bandwidth under normal circumstances.
The best sites to take a speed test
There are several reliable platforms you can use to check your network speed. These include:
- speedtest.es: offers detailed information, tests with TCP/HTTP protocol and servers distributed in the Espanix network.
- Speedtest.net: one of the best-known and most widely used globally, with a mobile app and rapid test.
- Movistar: offers its own test tailored to your network for fiber or ADSL customers.
- Speedometer R: tool to measure speed via Wi-Fi, fiber or mobile.
While all these tools are accessible and easy to use, remember that the most important thing is to create the right conditions for measurement . If you do, any of these options will give you a reliable estimate of your connection quality.
Performing a network speed test isn't just useful for detecting errors, but also for verifying contract compliance, optimizing your home network, or deciding whether it's worth switching providers. Knowing how and when to perform these tests makes the difference between obtaining useful data or misleading results. If you notice your connection isn't performing as it should, taking a few minutes to perform a good test can save you a lot of headaches.
Passionate writer about the world of bytes and technology in general. I love sharing my knowledge through writing, and that's what I'll do on this blog, show you all the most interesting things about gadgets, software, hardware, tech trends, and more. My goal is to help you navigate the digital world in a simple and entertaining way.