When using the internet, there is always the risk of encountering harmful websites that can both steal personal information and infect the system. Traditional protection measures are often insufficient to ward off the increasingly complex and sophisticated cyber threats. In addition, the number of devices connected to the internet is continuously increasing, making Domain Name System (DNS) security a crucial aspect in cybersecurity. A tool is needed that operates at the DNS level and is capable of providing real-time threat information to block access to known harmful websites and strengthen the existing security infrastructure. This could effectively combat ongoing cyber security threats and significantly improve the overall security situation.

Quad9 is a valuable tool for enhancing cyber security as it operates functionally at the DNS level. It serves to block access to known harmful websites, thereby minimizing the risk of encountering sites that could steal personal data or damage the system. Quad9 collects and utilizes threat information from various sources and provides real-time information on current threats. These real-time threat details strengthen a system's existing security infrastructure by enabling it to effectively block dangerous sites. Therefore, Quad9 is an excellent tool for combating the increasingly complex and sophisticated cyber threats. With Quad9, both businesses and individuals can significantly improve their security status and effectively negate ongoing cyber security threats. Overall, Quad9 represents a crucial defensive measure in the increasingly important field of DNS security.