Everything on the Internet, including websites, live at a numerical IP address. The Domain Name System, or DNS, translates these numerical IP addresses into human-readable domain names that we all know and remember. If your DNS settings are not working correctly, or you’re still using defaults, you may be at risk for cybercrime and performance issues. Quad9 is a free security solution that uses the DNS to protect your system against the most common cyber threats. It improves your system’s performance, plus, it preserves and protects your privacy. It’s like an immunization for your computer and devices.