DNS (Domain Name System)

• DNS servers are crucial for the functioning of the internet as they facilitate the resolution of domain names to IP addresses.
• A UDP package is sent over UDP (unencrypted) to the DNS Resolver on port 53
• ICANN: nonprofit organization that oversees the use of internet domains
• WHOIS info: https://lookup.icann.org/ (includes registrar and nameserver config)

DNSSEC (DNS Security Extensions)

• Protect your domain from threats
• DNS cache poisoning attacks
• DNS spoofing