Master the Domain Name System — from first principles to production operations. Choose your path.
Comprehensive reference covering 43 pages across 11 sections — fundamentals, security, protocols, performance, and more.
43 pages · 11 sections
Structured courses with exercises, progress tracking, and hands-on labs. Learn by doing.
3 courses · 36 lessons
The internet's phone book — how domain names become IP addresses.
Cryptographic authentication for DNS responses and the chain of trust.
A, AAAA, CNAME, MX, TXT, and every record type you need to know.
Step-by-step through the recursive and iterative resolution process.
Encrypted DNS with DoH and DoT — privacy, security, and deployment.
Caching strategies, TTL tuning, and optimizing DNS for speed.
Not sure where to start?
Begin with the basics. Our introductory guide walks you through everything DNS does and why it matters.
Start with "What is DNS?"