Query DNS records for domains and IPs (A, AAAA, MX, TXT, and more)
Master DNS fundamentals, security, and troubleshooting techniques
Understand how the Domain Name System maps names to IPs and why it matters.
Quick reference to A, AAAA, CNAME, MX, TXT, NS, SOA and when to use each.
Overview of DNSSEC for integrity and DoH/DoT for encrypted, private DNS queries.