Cybersecurity Foundations · 5 min
DNS
How names become network destinations
This lesson explains the concept, then checks your understanding in a short interactive exercise.
DNS — the Domain Name System
DNS commonly translates domain names people can remember into the IP addresses networks use to route data.
Why defenders watch DNS
Malware often relies on DNS, but so does every legitimate application on the network. Volume alone means nothing without context.
- Locating command-and-control infrastructure
- Reaching attacker-controlled systems
- Supporting data exfiltration or beaconing
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