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  2. Clock synchronization - Wikipedia

    en.wikipedia.org/wiki/Clock_synchronization

    Clock synchronization. Clock synchronization is a topic in computer science and engineering that aims to coordinate otherwise independent clocks. Even when initially set accurately, real clocks will differ after some amount of time due to clock drift, caused by clocks counting time at slightly different rates.

  3. Lamport timestamp - Wikipedia

    en.wikipedia.org/wiki/Lamport_timestamp

    Lamport timestamp. The Lamport timestamp algorithm is a simple logical clock algorithm used to determine the order of events in a distributed computer system. As different nodes or processes will typically not be perfectly synchronized, this algorithm is used to provide a partial ordering of events with minimal overhead, and conceptually ...

  4. System time - Wikipedia

    en.wikipedia.org/wiki/System_time

    System time. In computer science and computer programming, system time represents a computer system's notion of the passage of time. In this sense, time also includes the passing of days on the calendar . System time is measured by a system clock, which is typically implemented as a simple count of the number of ticks that have transpired since ...

  5. Network Time Protocol - Wikipedia

    en.wikipedia.org/wiki/Network_Time_Protocol

    t. e. The Network Time Protocol ( NTP) is a networking protocol for clock synchronization between computer systems over packet-switched, variable- latency data networks. In operation since before 1985, NTP is one of the oldest Internet protocols in current use. NTP was designed by David L. Mills of the University of Delaware .

  6. Clock signal - Wikipedia

    en.wikipedia.org/wiki/Clock_signal

    Clock signal. In electronics and especially synchronous digital circuits, a clock signal (historically also known as logic beat [1]) is an electronic logic signal ( voltage or current) which oscillates between a high and a low state at a constant frequency and is used like a metronome to synchronize actions of digital circuits.

  7. Real-time clock - Wikipedia

    en.wikipedia.org/wiki/Real-time_clock

    Real-time clock. A real-time clock ( RTC) is an electronic device (most often in the form of an integrated circuit) that measures the passage of time. Although the term often refers to the devices in personal computers, servers and embedded systems, RTCs are present in almost any electronic device which needs to keep accurate time of day .

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