Trace the complete DNS resolution for www.example.com (first visit, no cache): (1) Browser cache check, (2) OS cache check, (3) Recursive resolver (ISP), (4) Root DNS server, (5) TLD server (.com), (6) Authoritative server (example.com), (7) Response back. Explain: A vs AAAA vs CNAME vs MX records. What is DNS over HTTPS (DoH)?
