Tag
soa
- Sep 14, 2026 Zone Transfers and Secondary Replication: AXFR, IXFR, and the SOA Timers How a secondary server detects that a zone changed, what a full transfer costs against an incremental one, and how serial number arithmetic makes wrap-around safe. internet protocols
- Aug 22, 2025 Negative Caching: NXDOMAIN, NODATA, and the SOA Minimum How a resolver distinguishes a name that does not exist from a name with no records of the requested type, and how the SOA fields set the lifetime of both. internet protocols