Navigating DNS: Challenges and Innovations

This chapter explores the complexities of DNS resolution in IPv4 and IPv6 environments, addressing challenges associated with IPv6-only scenarios and the concept of 'Happy Eyeballs' for DNS management. It emphasizes the importance of privacy in DNS queries, introducing methods like DNS over HTTPS and DNS over TLS to enhance security. Additionally, the chapter discusses various techniques for protecting DNS servers within environments such as Microsoft Active Directory, including the risks of accidental exposure to the public internet.