DNS & Internet

Read the records that connect a name to a service, then test what resolvers and authoritative servers actually return. Every article carries a date, a source cue and a clear evidence boundary.

A network diagram notebook with DNS record cards and a small illuminated router — DNS & Internet as a working area: a route through records, decisions and limits.

Close view of DNS record cards labeled A, MX, TXT and CAA beside a handwritten zone file

DNS FIELD NOTE

August 24, 2026 · DNS & Internet

The DNS record types worth reading first

A field guide to A, AAAA, CNAME, MX, TXT, CAA and NS records, with the operational question behind each one.

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Two network paths drawn across a paper map, one marked resolver and one marked authoritative server

DNS FIELD NOTE

August 18, 2026 · DNS & Internet

Authoritative and recursive DNS answer different questions

Why a resolver cache can disagree with an authoritative server, and how to record the difference without calling it random.

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A DNSSEC key diagram on a workbench with a DS record card and a secure hardware token

SECURITY NOTE

August 16, 2026 · DNS & Internet

DNSSEC adds a chain of validation to DNS answers

A careful introduction to keys, DS records and the failure mode that matters more than a badge saying enabled.

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