Time Synchronization

Printer-friendly versionPrinter-friendly version

Network Time Protocol (NTP) synchronizes clocks of hosts and network devices. The National Institute of Standards and Techology estimates that there are millions NTP servers and clients deployed in the Internet all over the world. Every Windows and OS-X computer has an NTP client. NTP provides nominal accuracies of low tens of milliseconds on WANs, submilliseconds on LANs, and submicroseconds using a precision time source such as a cesium oscillator or GPS receiver.

Network Services operates one stratum 1 (submicroseconds) and two stratum 2 (submilliseconds) NTP servers for time synchronization. NTP service is configured on all 4J network devices and properly configured servers and client computers.

Time Synchronization is needed for

  • Secure logins
  • Distributed database transaction journalling and logging
  • Secure document timestamps (with cryptographic certification)
  • Intruder detection, location and reporting
  • Multimedia synchronization for real-time teleconferencing
  • Network monitoring, measurement and control
  • Early detection of failing network infrastructure devices
  • Monitoring of security systems and air conditioning equipment
  • Differentiated services traffic engineering