Windows 10 how to change DNS server command line in today’s world, where internet speed and security are more critical than ever, choosing the right DNS server can make a big difference. Domain Name System (DNS) servers interpret domain names like www.google.com into IP addresses that your computer grasp. If the default DNS provided by your Internet Service Provider (ISP) is slow or unreliable, switching to a faster, more secure DNS server like Google’s (8.8.8.8), Cloudflare’s (1.1.1.1), or OpenDNS can improve your browsing experience.