AP® Cybersecurity glossary
Domain name system (DNS)
Also called: DNS
The system that translates domain names into internet protocol (IP) addresses, using DNS servers, authoritative name servers and DNS records.
Appears in the course and exam description (CED): 3.1.A.33.5.E.5
Why it matters in Unit 3
Devices trust DNS answers without checking them, which DNS poisoning exploits.
Example
A laptop asks its DNS server for school.example. The DNS server gets the record 198.51.100.20 from the authoritative name server and passes it on.
Learn it properly, with a checkpoint Addresses: MAC, IP, ARP, DNS and ICMP