DNS The world's most successful distributed database-and the most naïve. The Domain Name System is one of the Internet's oldest protocols, designed for a network without hostile users. Intruders targeting a network start by investigating their DNS. DNS Security Extensions, or DNSSEC, hardens DNS and brings it into the 21 century. Learning DNSSEC required wading through years of obsolete tutorials, dead ends, and inscrutable standards. Until now. This new edition of will have DNS administrators deploying DNSSEC with industry-standard software in hours instead of weeks. You will: And more! transforms DNS from a headache to a solution.