With DNS Benchmark you can find the fastest DNS server for your connection and gain speed in response time and Internet performance, among other advantages. To carry out this task, we will use two platforms: DNS Jumper and DNS Benchmark, which will give you all the functions to find and use the best DNS server.
DNS Jumper
DNS Jumper is one of the best programs for finding DNS servers. The interface will show you a list of all available DNS servers, so you can select the fastest DNS. In the list you will find a bit of everything, from Google and OpenDNS DNS servers to lesser-known ones. The utility includes a selection of the fastest and even an option to purge DNS. The latest version of the utility is dated March 17, so you won't have to worry about old and obsolete DNS servers.
DNS Benchmark
With the slogan "you can't optimize it until you measure it", DNSBench is a benchmark for DNS (obviously!) that lets you check the performance of each one. The utility features an extensive list and a server comparison process that will give you precise results on which DNS server is fastest for your connection. The information provided by this platform is graphical, but if you want more detailed information, just right-click on each server and you will see the expanded information. Once you have chosen the fastest DNS server for your connection, you just have to select the adapter and apply the DNS to your connection.
Purge your DNS before connecting to another!
We recommend that before connecting to a new DNS you perform a DNS purge on your computer. DNS Jumper has this option built in. But if you can't do it from the system prompt, on Windows 10 you'll need to go to CMD and once the Command Prompt window is open, type the command ipconfig /flushdns and then press Enter.
These options for finding and selecting the fastest DNS server for your connection are very good. Both tools are free and available for Windows operating systems. I hope they have been helpful!
https://old.neoteo.com/tcp-optimizer-optimizando-la-conexion-de-red/