Examples of using The time source in English and their translations into Polish
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NTP will await at least ten packets of information before trusting the time source.
And if the time source itself is attacked,the effects can be even more severe.
However, a network time server is only as good as the time source that it synchronises to.
Although the time source is free,the cost of a resulting attack on your network will add up.
Typically, NTP provides accuracies of between 1 and50 milliseconds depending on the time source and network paths.
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Whilst NTP can maintain synchronisation of a network to within a few milliseconds it is only as good as the time source it receives.
Selecting the time source to use is perhaps the fundamentally most important thing in setting up a NTP network.
Furthermore, malicious users can also attack the time source itself, which could also result in security problems.
Meaning the time source may not be what it claims to be and with a hole in the firewall it could result in a malicious attack.
Authentication is a set of encrypted keys that are used to establish if the time source is coming from where it is claiming to come from.
The time source is going to be distributed amongst all machines and devices on a network so it is vital that it is not only accurate but also stable and secure.
However, regardless of how trusted the time source is, there are two problems with internet time sources. .
Every clock of the ZA/ZB series may be a central clock(MASTER) which,in the LAN, will provide the time source for other clocks Slave.
NTP analyses it andconfirms whether it has come from the time source by verifying it against a set of trusted keys in its configuration files.
The time source used by the NTP time server is extremely important as this forms the basis of all time updates across the network.
Internet time sources can be affected by the distance of the client(the network) from the time source- it also can't be authenticated by NTP.
In between polls(receiving the time source) a standard oscillator is used by the time server to keep time. .
In this mode requests are sent by a client to a server,with the client expecting a response within milliseconds, unless the time source is unavailable or extremely busy.
GPS NTP servers are designed to receive the time source generated by the atomic clocks onboard GPS satellites Global Positioning System.
It works by using a single time source that it then distributes around the network, checking for drift, andcorrecting devices to ensure parity with the time source.
Latency over distance can create delays,which could lead to errors, and if the time source ever went down,the stock markets could hit trouble.
NTP servers take advantage of the atomic clocks onboard GPS satellites so they can not only supply an accurate source of time butthey can assure that the time source never drifts.
This makes them far more secure than internet providers as the time source is external to the network(and firewall) but also it makes them more accurate.
Because the time source is continually checked by the time server and is from an atomic clock it makes the network accurate to within a few milliseconds of UTC providing synchronisation on a global scale.
Atomic clocks are used as the time source for high technologies and applications such as satellite navigation and air traffic control, they are also the source for time signals used by NTP servers to synchronise computer networks.
However NTP can only be as reliable as the time source that it receives and as UTC is the global civil timescale it depends on where the UTC source comes from.
For computer networks to receive UTC, they use NTP servers,which receive the time source from either the GPS network(Global Positioning System), radio transmissions, or from the internet itself.