When you enter a URL, Cloudflare 1.1.1.1 checks its memory cache. On cache miss, it recursively queries Root (.), TLD (.com), and Authoritative nameservers to resolve the IP address in milliseconds.
Visual representation of control loops, memory layout, and execution flow for DNS Resolution & Domain Hierarchy.
Browser checks OS hosts file and browser DNS cache.
If miss, sends query to ISP/1.1.1.1 Recursive Resolver.
Root server points resolver to .com TLD nameserver.
Authoritative server returns final A/AAAA record with TTL.
Detailed answers, interviewer pro tips, key takeaway summaries, and code examples formulated for technical rounds.
✅ Correction: CNAME records point to ANOTHER domain name, whereas A records point to IP addresses.
Hierarchical distributed resolution system for domain mapping.