Terminology Index
Glossary
2953 terms
Resolver
A DNS component that takes a domain query and finds the answer, recursively asking authoritative servers if needed. Resolvers are a foundational piece of DNS and a key place to monitor for malicious activity.
A DNS resolver is the service clients ask to translate names into IPs. Recursive resolvers walk the DNS hierarchy on the client's behalf and cache results. They are foundational networking infrastructure and an excellent monitoring vantage point: resolver logs reveal which domains a client tries to reach, including attempts to contact malicious infrastructure. Many detection and threat-intelligence integrations work at the resolver, making it both a critical service and a high-value observability point.
Introduced in: Networking Foundations
Examples
- A resolver looking up a domain name on the client's behalf.
- Logging resolver queries to detect connections to malicious domains.
- Caching DNS results to speed subsequent lookups.
