DNS
Domain Name System
Resolves human-readable names to IP addresses; a frequent attack and exfiltration channel.
The Domain Name System resolves human-readable names like example.com into IP addresses and underpins almost all internet communication. It is a frequent abuse channel through cache poisoning, spoofing, fast-flux hosting, and DNS tunneling for covert data exfiltration. DNSSEC adds cryptographic signatures to protect integrity, and DNS query logging is a high-value detection source for a security operations center.
Looking DNS up is step one. Getting tested on it is step two.
A free account opens all 4 Domain 1 objectives, 271 exam-style questions with a lesson and a lab on each, a placement check that skips what you already know, and a dated plan. No card.
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