Timing is Everything: NTP and the Importance of Accurate Network Time Synchronisation. Computers Articles | May 27 Landon Collins Youth Jersey , 2008 Copyright (c) 2008 Richard WilliamsOn occasion we all need to know the time and we have a multitude of different devices to tell us it; from our mobile phones and wrist watches to the office wall cloc...
Copyright (c) 2008 Richard Williams
On occasion we all need to know the time and we have a multitude of different devices to tell us it; from our mobile phones and wrist watches to the office wall clock or the chimes on the radio news.
But how accurate are all these clocks and does it matter if they are all telling different times? For our day-to-day business it probably doesn't matter too much if the office wall clock is faster than your wrist-watch your boss probably won't fire you for being a minute late. But in some environments accuracy and synchronisation are vital where a minute can make all the difference in something being sold or not or even something being stolen!
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 such as data acquisition or email.
Most PC's and network devices internal clocks Alex Smith Youth Jersey , called Real Time Clock chips (RTC) providing time and date information. The chips are battery backed so that even during power outages, they can maintain time. However, personal computers are not designed to be perfect clocks Sean Taylor Youth Jersey , their design has been optimized for mass production and low-cost rather than maintaining accurate time.
Therefore these internal clocks are prone to drift and although for many application this is can be quite adequate, often machines that work together on a network will become out of sync with each other and problems can arise particularly with time sensitive transactions. Can you imagine buying an airline seat only to be told at the airport that the ticket was sold twice because it was purchased afterwards on a computer that had a slower clock?
NTP time servers (Network Time Protocol) use a single time reference to synchronise all machines on the network to that time. This time reference can be either relative (a computer's internal clock or the time on a wrist-watch perhaps) or absolute such as an atomic clock that relays UTC time (Universal Coordinated Time) and is as accurate as is humanely possible.
Atomic clocks are the most absolute time-keeping devices accurate to a second every 1.4 million years. However, atomic clocks are extremely expensive and are generally only to be found in large-scale physics laboratories. However Wes Martin Womens Jersey , NTP can synchronise networks to UTC time via an atomic clock by using either the Global Positioning system (GPS) network or specialist radio transmissions (MTF in the UK).
While some organisations have to synchronise their networks to UTC such as airlines and the stock exchange, a network can be synchronised to any time and still function, but there really is no substitute for UTC time. Not only is it more efficient to have network synchronised with the rest of the world Bryce Love Womens Jersey , a UTC time source is vital in providing security against fraud, data loss and legal exposure and without it, organizations can be vulnerable and lose credibility.
NTP (version 4) can maintain time over the public Internet to within 10 milliseconds (1100th of a second) and can perform even better over LANs with accuracies of 200 microseconds (15000th of a second) under ideal conditions.
Note: it is strongly recommended by Microsoft and others Terry McLaurin Womens Jersey , that external based timing should be used rather than Internet based, as these can't be authenticated. Specialist NTP servers are available that can synchronise time on networks using either the MSF (or equivalent) or GPS time server signal.
Article Tags: Network Time
Find your dream career, don't settle for just having a job.
Anyone can get a job and get paid. This isn't too difficult and it's very short-term thinking. I believe there has to be something more to a person's work life than just moving from job to job hoping to find something better than the job they have now.
What is the difference between a dream job and a dream career?
I think it depends on the person and what that person's goals are when it comes to their work life.
If your dream job is to work as a sportscaster because you love sports Montez Sweat Womens Jersey , perhaps getting a job on tv as a sports anchor would accomplish everything you ever wanted and would be your 'dream job.? Perhaps you'd be happy working for a small local tv station as long as you were getting paid to talk sports and you would have no desire to move beyond this.
But maybe your goals are a bit different.
Maybe you want to work as a sportscaster but aspire to work for a national tv station and won't be happy with just working on local tv. Perhaps you will work for a local tv station only as a means to getting your foot in the door and eventually moving to a larger regional channel and eventually to a national tv station. Anything less than this would be considered a disappointment and if you found that you unable to move to the national stage, you would eventually change careers. For you, it's all or nothing.
In other words Dwayne Haskins Womens Jersey , your dream job is to work as a sportscaster but to find your dream career, you must attain a sportscasting role on the national stage, something that involves a more prolonged career path.
In order to find your dream job Da'Ron Payne Womens Jersey , it might just be a matter of applying for the job and getting it!
offenes linkes forum
Thema drucken
20.11.2019 08:06
Antworten
