DNS

You'll understand how DNS translates human-readable domain names into IP addresses and why this system is essential for the internet.

You'll learn how DNS is organized in a hierarchical structure with root, TLD, and authoritative nameservers working together to resolve domains.

You'll recognize key record types like A, AAAA, MX, and CNAME, and understand what each one does in the DNS system.

You'll see how recursive and iterative queries work together to resolve domains, and learn why DNSSEC matters for protecting DNS from attacks.