Mar 9, 2013

NTP Version 4

According to the NTP Version 4 Release Notes found in release.htm, the new features of version four (as compared to version three) are:

Use of floating-point arithmetic instead of fixed-point arithmetic.
Redesigned clock discipline algorithm that improves accuracy, handling of network jitter, and polling intervals.
Support for the nanokernel kernel implementation that provides nanosecond precision as well as improved algorithms.
Public-Key cryptography known as autokey that avoids having common secret keys.
Automatic server discovery (manycast mode)
Fast synchronization at startup and after network failures (burst mode)
New and revised drivers for reference clocks
Support for new platforms and operating systems
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