DNS Documentation
Comprehensive, visual, and interactive. Everything you need to understand the Domain Name System — from first principles to production operations.
Fundamentals
5 pages
- What is DNS?
- How DNS Resolution Works
- DNS Record Types
- Zones and Delegation
- +1 more
Infrastructure
4 pages
- The Root Servers
- The TLD Landscape
- Public Resolvers
- Query Volumes and Traffic
Security
4 pages
- DNS Security Threats
- DNSSEC
- DNS Privacy
- DNS Filtering and Blocking
Email Authentication
3 pages
- SPF (Sender Policy Framework)
- DKIM (DomainKeys Identified Mail)
- DMARC
Protocol
4 pages
- DNS Message Format
- EDNS(0) and Extensions
- DNS Transport Protocols
- Key RFCs
Operations
4 pages
- DNS Software
- Managed DNS Providers
- DNS Monitoring and Debugging
- DNS Migrations
Modern DNS
4 pages
- DNS for CDNs and Load Balancing
- DNS in Kubernetes and Cloud
- Enterprise DNS
- DNS Beyond the Web
Performance
4 pages
- The Anatomy of DNS Latency
- DNS and Web Performance
- Resolver Benchmarks
- DNS Optimization Techniques
History
4 pages
- Before DNS: HOSTS.TXT
- The Creation of DNS
- DNS Milestones
- The Domain Name Market
Governance
3 pages
- ICANN and IANA
- DNS Censorship
- Domain Seizures and Disputes
Reference
4 pages
- Record Type Reference
- DNS Response Codes
- RFC Index
- Glossary