NTP: Definition, Use Cases, and Examples
NTP (Network Time Protocol) synchronises time across networks. UDP port 123. Stratum 0 (atomic clocks) → Stratum 1 (public NTP servers) → downstream. Critical for TLS certs, logs, distributed systems. Drift > 5 min causes ERR_CERT_DATE_INVALID and Kerberos/OAuth failures.
What is NTP
NTP (Network Time Protocol) synchronises time across networks. UDP port 123. Stratum 0 (atomic clocks) → Stratum 1 (public NTP servers) → downstream. Critical for TLS certs, logs, distributed systems. Drift > 5 min causes ERR_CERT_DATE_INVALID and Kerberos/OAuth failures.
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