Labs · 3 scenarios
DNS Resolution
Follow a name lookup from record types through the full resolution chain to common failures.
Beginner
DNS record types
Match A, CNAME, MX, and PTR records to what they actually do.
Intermediate
Resolution order
Walk the lookup chain from hosts file to root, TLD, and authoritative servers.
Advanced
DNS troubleshooting
Explain stale answers and NXDOMAIN caching after a record change.