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NTP synchronizes a server's clock with an accurate time source, keeping it precise to within milliseconds of the correct time.
Why Clock Accuracy Matters
SSL certificate validation, scheduled tasks, log timestamps, and authentication protocols all depend on accurate time — a clock drifting even a few minutes off can cause SSL errors or authentication failures.
How It Works
Servers periodically query NTP servers (often organized in a hierarchy for accuracy and redundancy) and gently adjust their own clock to stay in sync, rather than jumping abruptly.
