If you see inaccuracies in our content, please report the mistake via this form. If we have made an error or published misleading information, we will correct or clarify the article. Our editors thoroughly review and fact-check every article to ensure that our content meets the highest standards. Our goal is to deliver the most accurate information and the most knowledgeable advice possible in order to help you make smarter buying decisions on tech gear and a wide array of products and services. ZDNET's editorial team writes on behalf of you, our reader. Indeed, we follow strict guidelines that ensure our editorial content is never influenced by advertisers. Neither ZDNET nor the author are compensated for these independent reviews. This helps support our work, but does not affect what we cover or how, and it does not affect the price you pay. When you click through from our site to a retailer and buy a product or service, we may earn affiliate commissions. And we pore over customer reviews to find out what matters to real people who already own and use the products and services we’re assessing. We gather data from the best available sources, including vendor and retailer listings as well as other relevant and independent reviews sites. Increased latency decreases the TCP window size.ZDNET's recommendations are based on many hours of testing, research, and comparison shopping. 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. You have likely noticed that downloading from a local server location is also faster than a distant one. Our speed test server is modelled to reflect normal browsing across currently available websites. 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. 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.
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