Routers have also been known to create unintentional DoS attacks, as both D-Link and Netgear routers have created NTP vandalism by flooding NTP servers without respecting the restrictions of client types or geographical limitations.
In a rubber stamping, conventionally crafted signature/logo on a rubber stamp is transferred or replicated onto a paper surfaces using organic dye or ink while in nTP, nanolithographically created structures on silicon or PDMS "stamp" are transferred or printed on other surfaces such as glass or polymers using metal ink.
Joining the pool requires at least a broadband connection to the Internet, a static IP address, and accurate time from another source (for example from another NTP server, from a DCF77 receiver, WWVB receiver or a GPS receiver).
One incident was branded NTP vandalism in an open letter from Poul-Henning Kamp to the router manufacturer D-Link in 2006.
NTP brought a patent infringement lawsuit against one of the companies, Research in Motion, in the United States District Court for the Eastern District of Virginia.
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NTP also owns an equity stake in mobile email start up company Visto.
The name of the software was changed back to "ntpd" for version four because the NTP creator, Dave Mills, decided that something probably should not be "experimental" for about twenty years without changing dramatically.
John Houseman, the director of the NTP, invited the young white director Orson Welles to direct a production of Macbeth.