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Networking Beginner

DNS Explained – Complete Beginner to Advanced Guide

A complete beginner-to-advanced guide teaching how DNS works, domain name resolution, DNS records, nameservers, DNS security, DNS troubleshooting, cloud DNS, and real-world DNS infrastructure.

20 chapters 6h 55m 4.8 (114)
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What you'll learn

  • Introduction to DNS
  • History and Evolution of DNS
  • Understanding How DNS Works
  • DNS Architecture and Hierarchy
  • Domain Names and TLDs
  • DNS Records Explained
  • Recursive and Authoritative DNS Servers
  • DNS Resolution Step-by-Step

Course content

20 chapters · 6h 55m
  1. 1 Introduction to DNS 15 min
  2. 2 History and Evolution of DNS 15 min
  3. 3 Understanding How DNS Works 20 min
  4. 4 DNS Architecture and Hierarchy 20 min
  5. 5 Domain Names and TLDs 15 min
  6. 6 DNS Records Explained 20 min
  7. 7 Recursive and Authoritative DNS Servers 20 min
  8. 8 DNS Resolution Step-by-Step 20 min
  9. 9 DNS Caching and Performance 20 min
  10. 10 DNS and Web Hosting 20 min
  11. 11 DNS Security Basics 20 min
  12. 12 DNS Over HTTPS (DoH) and DNS Over TLS (DoT) 20 min
  13. 13 DNS in Cloud Computing 20 min
  14. 14 CDN and Global DNS Routing 20 min
  15. 15 Reverse DNS and PTR Records 20 min
  16. 16 DNS Troubleshooting Tools 20 min
  17. 17 DNS for Email Systems 25 min
  18. 18 Enterprise and Large-Scale DNS 25 min
  19. 19 DNS Interview Questions and Labs 30 min
  20. 20 Build and Configure a Real DNS Infrastructure 30 min