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16th July 2009
There are chronologists all over the world working constantly to find new ways of telling time that are the most accurate that can possibly be created. The first atomic clocks were developed in the 1950’s and thus began the race for millisecond accuracy... Read >
Author: Graham Gallagher21st April 2009
The GPS system is a satellite navigation system operated by the US Department of Defence. It essentially provides a subscription-free civilian timing and navigation service. GPS is primarily intended as a highly accurate global positioning and navigation ... Read >
Author: Dave26th February 2009
Do you regularly need to correct the time on your PC? The answer is probably "Yes!". This is because computers have very poor time-keeping hardware. Often, the system clock in a regular PC can drift by minutes each day. However, help is at hand. It is ver... Read >
Author: Dave18th December 2008
NTP, or Network Time Protocol, is a standard protocol for synchronising time on computers and network equipment. NTP allows client computers to synchronise with a reference NTP server over a computer network. The protocol was originally developed for the ... Read >
Author: Dave02nd December 2008
The DCF-77 radio time and frequency transmission is broadcast from Mainflingen near Frankfurt, Germany. The DCF-77 signal can be used by timing equipment to provide a precise time reference. Computer timing equipment, such as NTP server systems, which pro... Read >
Author: Dave25th September 2008
A NTP Server is a network device that provides network servers and other network infrastructure with an accurate timing reference. A NTP Server obtains precise time from an external time source, such as radio time and frequency broadcasts or GPS. This art... Read >
Author: Dave23rd September 2008
Network Time Protocol seems to have been around for ever. In fact it is indeed one of the Internet’s oldest protocols having been developed in the 1980’s by Professor David Mills and his team from Delaware University.
In a laid-back world it perhap... Read >
Author: Richard N Williams23rd September 2008
A NTP Server connects to a computer network with the purpose of synchronising all computers, routers and other devices to the exact same time. NTP servers use Network Time Protocol to adjust the drift of different machines to match the reference time.
... Read >
Author: Richard N Williams28th August 2008
When you set your watch by the speaking clock or the radio beeps have you ever wondered who is responsible for setting that time and how they can be sure it is accurate.
This may seem like a straightforward question but their is no master clock that th... Read >
Author: Richard N Williams24th July 2008
Computers systems have internal real-time clocks that are notoriously poor at keeping accurate time. Hence, the time on all computers and network devices can drift away from one another at different rates. This can be a real headache when trying to synchr... Read >
Author: Dave22nd July 2008
Atomic clocks are incredibly expensive and generally they are normally only to be found in large scale physics laboratories such as MIT (Massachusetts Institute of Technology), NIST (National Institute of Standards and Technology (Colorado) or the Nationa... Read >
Author: Richard N Williams18th July 2008
Atomic clocks are incredibly expensive and generally they are normally only to be found in large scale physics laboratories such as MIT (Massachusetts Institute of Technology), NIST (National Institute of Standards and Technology (Colorado) or the Nationa... Read >
Author: Richard N Williams18th July 2008
Network Time Protocol (NTP) is an Internet protocol used for the transfer of accurate time, providing time information so that a precise time can be obtained and maintained on a network
Most UNIX and Linux operating systems provide built-in time synchr... Read >
Author: Richard N Williams17th July 2008
Network Time Protocol (NTP) is an Internet standard protocol designed over 25 years ago and still under constant development. NTP synchronises devises on a network to a single timing source. If time on a network is not synchronised when applications are c... Read >
Author: Richard N Williams16th July 2008
NTP servers, like most systems are open to abuse and misuse. NTP servers can be flooded with traffic (a distributed denial of service - DDoS attack), the server's access policy could be violated or the NTP rules of engagement drawn up to prevent misuse of... Read >
Author: Richard N Williams11th July 2008
This article explains the origins and workings of atomic clocks and how they are used to synchronise computer networks all over the world using NTP servers.
In conventional electronic clocks time is kept by running an electrical current through an os... Read >
Author: Richard N Williams04th July 2008
NTP servers (Network Time Protocol) are devices that can synchronise a computer network to an authoritative UTC time source. UTC (Coordinated Universal Time) is a global time scale used throughout the world and provided by atomic clocks.
NTP servers ca... Read >
Author: Richard N Williams03rd July 2008
Time synchronisation in modern computer networks is essential, all computers need to know the time as many applications, from sending an email to storing information are reliant on the PC knowing when the event took place.
Microsoft Windows XP has a ti... Read >
Author: Richard N Williams03rd July 2008
NTP servers or Network Time Protocol are devices that connect to a computer network and synchronise all machines to a single time source. Of course most Windows operating systems have an inbuilt NTP program called Windows Time that can synchronise to an I... Read >
Author: Richard N Williams01st July 2008
It can be really annoying. You have just got off the plane, booted up your lap top and set the clock to local time. Yet all your appointments suddenly move, not just the ones on that side of the ocean either, when you return home and reset the clock the a... Read >
Author: Richard N Williams23rd June 2008
The world is becoming an ever smaller place. Modern technology means that it is just as easy to make a purchase from the other side of the world as it is buy something from our local high street.
Everything from hotels and airline tickets to jewellery ... Read >
Author: Richard N Williams20th June 2008
Knowing the time is an essential part of our daily lives. We all need to know what time to start work, what time to leave and even when to get up in the morning. We have a multitude of different devices for telling us the time; from our mobile phones to o... Read >
Author: Richard N Williams19th June 2008
NTP is almost as old as the Internet itself. It was devised and developed by Dr David Mills of the University of Delaware and has been in constant use and continually updated since 1985. NTP is an internet protocol designed to synchronise clocks on a comp... Read >
Author: Richard N Williams10th June 2008
Computers are now part and parcel of our daily lives and we often take them for granted. Whether we are starting our car, loading the washing machine or taking cash out of the bank, a computer is behind it.
We are also used to computers talking to each... Read >
Author: Richard N Williams30th May 2008
Copyright (c) 2008 Richard Williams
Time synchronisation in modern computer networks is essential. It not only provides the only frame of reference between all devices, it is critical in everything from securing, planning and debugging a network to pro... Read >
Author: Richard N Williams15th May 2008
Network Time Protocol (NTP) is one of the Internet’s oldest protocols still used, invented by Dr David Mills from the University of Delaware, it has been in utilized since 1985. NTP is a protocol designed to synchronize the clocks on computers and netwo... Read >
Author: Richard N Williams02nd May 2008
Time synchronisation in modern computer networks is essential. It not only provides the only frame of reference between all devices, it is critical in everything from securing, planning and debugging a network to providing a time stamp for applications su... Read >
Author: Richard N Williams02nd May 2008
All PC’s and networking devices use clocks to maintain an internal system time. These clocks, called Real Time Clock chips (RTC), provide time and date information. They are battery backed so that even during power outages, they can maintain time. Howev... Read >
Author: Richard N Williams31st January 2008
GPS is a US military system that provides highly precise time and positioning information anywhere around the globe. The system consists of 24 Earth orbiting satellites each constants broadcasting accurate time and positioning information to Earth. The br... Read >
Author: Dave22nd January 2008
Computer servers and workstations have integrated real-time clocks that are based on simple, cheap, crystal oscillators. The real-time clock is battery backed and maintains system time even when the computer is switched off. However, crystal oscillators c... Read >
Author: Dave07th November 2007
PC's maintain system time with relatively inexpensive crystals and real time clock chips. The low-cost and specification of the timing devices utilised means PC's can often keep very poor time. However, there are a number of hardware and software solution... Read >
Author: Dave01st November 2007
The Windows 2000 Server operating system includes a time synchronisation service called w32time or ‘Windows Time’. The service is installed by default and runs continuously in the service list. The time service is required by the Kerberos authenticati... Read >
Author: Dave20th September 2007
The Windows Time service (W32Time) is designed to allow all Windows 2000 or later machines in an organisation to utilise a synchronised time. The service is used to ensure the security of the Windows Kerberos authentication protocol. This article describe... Read >
Author: Dave29th August 2007
Copyright (c) 2007 Galleon Systems
An accurate time reference is a fundamental requirement to many computer software applications. Although every Personal Computer incorporates an internal clock, it pays to check that the date and time settings are cor... Read >
Author: galleon13th August 2007
The Network Time Protocol (NTP) was developed over 25 years ago as a means of distributing accurate time across the Internet. It is one of the oldest Internet protocols still in use today. NTP is a client-server based protocol for the distribution of accu... Read >
Author: Dave03rd August 2007
The MSF radio time broadcast is a long-wave radio transmission of highly accurate time. The signal can be received throughout the whole of the UK and much of North Western Europe. With the additional of a low-cost radio receiver computers and computer net... Read >
Author: Dave01st July 2007
Computers maintain time and date information using internal real-time clock chips. These chips are battery-backed and maintain time even when the power to the computer is switched off. However, the components utilised are relatively low-cost devices and h... Read >
Author: Dave26th June 2007
Network Time Protocol (NTP) is a standard protocol for synchronising the time of client computers on the Internet and computer networks. The protocol operates in a hierarchical manner, each level or stratum serving the next level in the hierarchy. At the ... Read >
Author: Dave23rd May 2007
Network Time Protocol (NTP) is a standard Internet protocol for the dissemination of time around a computer network. The protocol operates in a hierarchical manner, each level or stratum serving the next level in the hierarchy. At the top of the hierarchi... Read >
Author: Dave10th April 2007
NTP or Network Time Protocol is an Internet protocol used to disseminate time across a computer network. It is widely used to synchronize time critical applications to an accurate reference time source.
This article describes the Network Time Protocol ... Read >
Author: Dave07th April 2007
Many time critical computer network systems, such as NTP servers, utilise the GPS system as a precise timing reference.
This article describes how the Global Positioning System can be used to provide a precise timing reference and provides an overview ... Read >
Author: Dave02nd March 2007
NTP or Network Time Protocol servers are network devices that are designed to distribute accurate time to network time clients and other network infrastructure. This article describes how to configure and install NTP server systems on a network and discus... Read >
Author: Dave19th February 2007
The MSF-60 atomic clock synchronised radio time transmission is utilised by many NTP Time Server and PC computer systems to provide accurate synchronisation of time critical applications. This article describes how the MSF-60 time signal is decoded by NTP... Read >
Author: Dave10th February 2007
PC's have internal real time clocks designed to maintain system time. The internal clocks rely on relatively low-cost crystal oscillators, which are notoriously inaccurate. In many cases PC system time can drift by several minutes each day. This article d... Read >
Author: Dave27th January 2007
An atomic clock provides an extremely accurate source of time. There are various types of atomic clock, mostly found in laboratories: Caesium Clocks; Hydrogen Clocks; and Rubidium Clocks. Most commercially available atomic clock time synchronisation syste... Read >
Author: Dave
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