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Apex Root — the topmost name of a DNS zone, represented by the zone's own domain name and often written as @ in zone files.
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.
Apex Root — the topmost name of a DNS zone, represented by the zone's own domain name and often written as @ in zone files.
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.
