Network Download Speed Cap

What is FAST.com measuring? FAST.com speed test gives you an estimate of your current Internet speed. You will generally be able to get this speed from leading Internet services, which use globally distributed servers.

Why does FAST.com focus primarily on download speed? Download speed is most relevant for people who are consuming content on the Internet, and we want FAST.com to be a very simple and fast speed test.

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How are the results calculated? To calculate your Internet speed, FAST.com performs a series of downloads from and uploads to Netflix servers and calculates the maximum speed your Internet connection can provide. More details are in our blog post.

What can I do if I'm not getting the speed I pay for? If results from FAST.com and other internet speed tests (like dslreports.com or speedtest.net) often show less speed than you have paid for, you can ask your ISP about the results.

Download speed measures how fast information can transfer to you. It affects things like how long it takes to download large files, update games, or show pages with lots of photos. Download speed is measured in megabits per second (Mbps). One gigabit is 1000 Mbps, two gigabits is 2000 Mbps.

Upload speed measures how fast information can transfer from you. It affects things like how you appear on video calls, how fast you can upload files to the cloud, and how long it takes to add attachments to emails. Upload speed is measured in megabits per second (Mbps).

Jitter measures the fluctuations in the speeds at which a stream of data is sent. A high jitter score can affect streaming and video calls, making them look and sound choppy or glitchy. Jitter is measured in milliseconds (ms).

1: Plus taxes and fees. Upload/download speed and device streaming claims are based on maximum wired speeds. Actual internet, Wi-Fi speeds, and Wi-Fi coverage are not guaranteed and can vary based on factors such as home or business size and layout, construction materials, hardware and software limitations, latency, packet loss, etc. See what affects internet speeds.

An internet speed test measures the connection speed and quality of your connected device to the internet. It does so by running multiple consecutive tests that analyze different aspects of your internet connection, namely ping (latency), download speed, and upload speed. Each of these values represents the connection's specific qualities, which you can read more about in the paragraph after the next. These should help you understand the final speed test results. But before we get to these, we first want to discuss how to perform each test.

To speed test internet performance for downloading data the test is performed by opening multiple connections to a server and simultaneously starting the download of a large data file on all connections. This approach ensures that the entire bandwidth of the internet connection is maxed out, and thereby the maximum data throughput can be measured. Recording the data throughput against measurement time finally yields the available internet speed for downloading data.

Upload speed is tested by reversing the sequence of the download analysis. Again multiple connections are opened to the test server. Instead of downloading a file, a large file of random data is created on your device and pushed through all connections to the server. Pushing the data to the server over the network via multiple streams ensures that the maximum throughput is measured. Again, recording the data throughput against time yields the available internet speed for uploading data.

During the ping test, the device sends a small data package over the network to the test server on the internet. This test doesn't focus on upload speeds but on response time. When the server receives this package, it will send it back to the device, completing the roundtrip. The time it takes the data package to complete the roundtrip is called latency, also known as ping. To achieve an accurate reading, multiple ping tests are conducted consecutively, with the final result being the average of all these tests.

All these are automatically handled for you when you use Speedcheck to test internet speed. But you should take one crucial aspect into account to test speed accurately. Choose the right tool. This depends on the device you want to use, being a phone or tablet, or a computer. To check internet speed on a computer, use your browser and the app on this website. To achieve accurate results on mobile devices, you should download our iOS or Android app, respectively. This is especially important when running a WiFi speed test. Because browsers on mobile devices have poor performance, we suggest using a mobile app written in native code to ensure the most accurate test results.

Download speed determines the transfer rate of how fast data is transferred to your device from the internet. It's calculated by dividing the total throughput of data in a given time frame by its duration. Therefore its unit is denoted by units of data over time. Most often, download speeds are denoted in Megabits per second (Mbps or Mb/s), although other forms like Kilobits per second (Kbps or Kb/s) or Megabyte per second (MBps or MB/s) are also common.

Upload speeds as opposed to download speeds characterize the amount of data your device can send to the internet. It's calculated the same way and is therefore denoted in the same units. Upload speed is very important for online gaming and video calls, where you need as much speed as possible.

The ping or latency describes the delay of a signal due to the time it takes that signal to travel to its destination. In this context, it represents the time it takes a data package to complete its roundtrip over the network and the acknowledgment from the server that it was received. As a value of time, it is denoted as such, most often in Milliseconds (ms). It's a value for the responsiveness of your connection that also correlates with packet loss. A high latency will lead to more packet loss while a low latency will ensure almost none.

I can test my internet speed to learn about my connection speeds. This enables me to a) ensure that I'm getting what I'm paying for from my internet service provider and b) helps me adapt my expectations about what type of applications I can run like online games or video calls without issues on my network.

It's important to understand that different internet speeds are necessary for different usage scenarios. Both download and upload speeds determine what's possible. So when you test internet speed, keep in mind that the question "How fast is my internet?" can only be answered in relation to what you want to use the connection for. While simply browsing the web can be achieved with low single-digit megabit per second speeds, streaming Netflix in 4K resolution will need a maximum speed of at least a 25Mbps connection speed. Online gaming will primarily be influenced by your ping, with a smaller ping being better while publishing content on the web, like uploading large videos to Youtube will be primarily constrained by your upload bandwidth. To download files especially large files at a good speed you should aim for a download speed with a transfer rate of at least 10Mbps.

I recently upgraded my business internet from 10mbps/1mbps (yeah yeah I know), to 200mbps/10mbps via Spectrum Business. After the hardware change and account change however, I am only getting 25mbps/10mbps on my LAN from all devices wired or wireless -- fast workstation desktops to i9 laptops. I then decided to hook a laptop via Cat5 1000gbit directly to the Spectrum modem to see what kind of speeds I was getting before the UTM9 firewall/LAN. I was reliable getting 100+ mbps download and sometimes closer to 200mbps depending on which test I was using. So the impasse/slowness is beyond the Spectrum modem.

When I called Spectrum they indicated their modem was only connected at 100mbit but I dont believe that because the connector on the modem end is giving an amber light. However the lights on the same cable going into the UTM9 WAN port is double green and no amber. I tried to determine what speed the UTM9 was connecting at -- I figured it was autonegotiate -- but it didnt seem to indicate anywhere in the WebAdmin. Just stated it supported 1000baset. In any case even if its connecting at only 100baset, I should still be getting far faster speeds than 25mbps. And its never 26-27mbps. It hits 25 and basically hits the wall.

I need to do something to get my LAN connection speeds at least over 100mbps reliably because Im paying far too much to only get 25mbps of pipe. What am I doing wrong and what can I do to try and fix? Since I have Sophos support should I reach out to them so they can log in and poke around?

Can you post a basic diagram of your network? (You can drag a picture into this text box to upload it directly to the forum). How many users on your network? If you are paying for a 200mb connection and they only have you connected at 100mb, what is the reason they gave about that? Are you sure the modem you have is what you need if they are only connecting you with 100mb? I know this is aside from the UTM issue, but if you are paying for 200... the least they can do is not leave your connection at 100.

This is a rudimentary diagram of the network. Its pretty simple and just a home office network. Only a couple users at any one time. I do have some legacy IIS servers connected using those additional public IPs on the WAN NIC, but they get next to zero traffic. I dont even really use them anymore.

I checked my NIC speed on my wired PC and its says its connected to the office hub at 1.0gbit (though only green flashing lights on the modem end connection of this cable). I then took an old laptop I had lying around that actually had a hardwired RJ45 port. I hooked that laptop DIRECTLY to the Spectrum modem and in front of all other hardware. I did a speed test and I get a lot of different results. ff782bc1db