[Nottingham] "ntpq -p" displayed flags

Michael Quaintance penfoldq at penfoldq.co.uk
Fri Jan 27 16:52:10 UTC 2012

> > Will you be writing up PTP (IEEE 1588) next? ;-)
> No.
> In any case, there are various other peering systems appearing that are
> fully distributed that the MPAA and RIAA cannot so easily vandalise.
Martin, it seems you misunderstood.

PTP (IEEE 1588) is the Precision Time Protocol

"This standard defines a protocol enabling precise synchronization of
clocks in measurement and control systems implemented with technologies
such as network communication, local computing and distributed objects. The
protocol will be applicable to systems communicating by local area networks
supporting multicast messaging including but not limited to Ethernet. The
protocol will enable heterogeneous systems that include clocks of various
inherent precision, resolution and stability to synchronize. The protocol
will support system-wide synchronization accuracy in the sub-microsecond
range with minimal network and local clock computing resources. The default
behavior of the protocol will allow simple systems to be installed and
operated without requiring the administrative attention of users."

PTP is basically trying to be a better (more accurate) NTP. It's not
Peer-to-Peer as you seem to have read it.

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