Increased latency decreases the TCP window size. The larger the window size, the higher the speeds.
The TCP window size determines how many packets can be sent at one time. This is because the TCP window is not optimized for the increased latency that comes from an increase in distance. A gateway speed test checks the speed between your AT&T Wi-Fi gateway and our network. You can run the test through a cellular (mobile) network, a wired broadband connection, or your home Wi-Fi. You have likely noticed that downloading from a local server location is also faster than a distant one. The device speed test checks the speed between your smartphone, tablet, computer, or other device and the internet. Our speed test server is modelled to reflect normal browsing across currently available websites. To test the speed of the internet connection to your home, use an. Also, the third party site may not be using test files that are large enough to permit an accurate reading for speed tiers with higher speeds. You can test the WiFi speeds throughout your home by running a speed test in different rooms. This counteracts the ability to reach higher speeds, as there is more wait time from the packets being sent and received from the third party speed test server. In addition, the third party's test engines could be using a single threaded TCP connection during testing. Those "peering" networks may have an effect on the overall speeds.
For example, when using a third party speed test site, your traffic may travel over networks that are not controlled by Gibtelecom. There are a number of other variables which could impact your speed test results from a third party test site. The results from Gibtelecom speed tests represent an estimate of the maximum connection speeds for downloading and uploading with a test server hosted within Gibraltar.