Dedicated DNS (Domain name System) server is a DNS server customized for specific organizations or individuals. Compared with the default DNS server provided by using Internet service providers (ISP), it has some advantages:

　　Fast response time: Dedicated DNS servers usually have higher performance and lower latency, because they are optimized for specific users or organizations to provide faster domain name analysis services.

　　Customized security: It can configure the security strategy of a dedicated DNS server according to specific needs, including filtering malicious websites, preventing DNS hijacking, and providing other security functions to improve network security.

　　Reduce the risk of censorship: In certain areas, the DNS server provided by ISP may be reviewed or monitored. Using a dedicated DNS server can help users bypassed such censorship and improve the privacy of Internet access.

　　Better control: Individuals or organizations can better control the configuration of the dedicated DNS server, including custom domain name analysis rules, cache settings, and other parameters to meet specific needs.

　　Improvement of privacy protection: Using a dedicated DNS server can reduce the DNS request provided by ISP, reduce the possibility of being tracked by the online activities of individuals or organizations, thereby enhancing privacy protection.

　　Better stability: Dedicated DNS servers usually have better stability and reliability because they are stricter monitoring and management, and may be equipped with redundant systems to ensure that they are still available when the server fails.

　　Support specific business needs: some organizations may have special business needs and require specific DNS settings to meet these needs. Use a special DNS server to achieve these custom configurations easier to achieve.

　　It should be noted that the use of a special DNS server also needs to consider the responsibility of maintaining and updating to ensure the normal operation and security of the server.