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Google NTP Server Overview
networkinterview.com/google-ntp-server-network-time-protocol/Yapay zekadan makale özeti
- NTP Protocol Basics
- NTP synchronizes computer systems since 1985, invented by David L. Mills
- Maintains time differences up to 10 milliseconds worldwide
- Uses UDP port 123 for timestamps and broadcasting
- Version 4 (NTPv4) is standard, backward compatible with version 3
- Google's Leap-Smeared Time
- Google's NTP server uses leap-smeared time since 2008
- Implements 24-hour linear smear system from noon to noon UTC
- Smear frequency change is about 11.6 ppm
- System minimizes maximum offset compared to cosine smear
- Amazon uses same smearing system in AWS
- Technical Details
- Uses intersection algorithm to choose accurate time servers
- Can handle variable network latency but may experience 100 ms errors
- Cannot provide information about local time zones or daylight saving
- Supports both client-server and peer-to-peer negotiations