Explore the intricacies of the Domain Name System (DNS) in this 46-minute conference talk from Converge 2015. Delve into DNS operation and security, covering essential topics such as DNS structure, terminology, and domain hierarchy. Learn about potential vulnerabilities like open resolvers, blind transfers, and domain hijacking. Discover how DNS can be exploited for tunneling and gain insights into behavior analysis techniques. Examine solutions like Google DNS, Checkpoint IPS, and DNSSEC to enhance DNS security and protect against common threats.