Don't have an account? Sign up
If you're already signed up, please sign in
SOA Expire — the SOA time limit after which a secondary server that cannot refresh the zone must stop serving it as authoritative.
DNS is a distributed hierarchy. A resolver starts with available data and, when necessary, queries root, TLD, and authoritative servers. TTL-based caching reduces query volume but delays the visibility of changes.
SOA Expire — the SOA time limit after which a secondary server that cannot refresh the zone must stop serving it as authoritative.
This component participates in locating, storing, or returning authoritative data about domain names. Its role is determined by its place in the hierarchy and the type of DNS query.
Query the authoritative servers and a recursive resolver separately. Compare the answer, TTL, delegation, and cache state to distinguish a zone error from stale client-side data.
