Protocols and time transfer
Timestamping
Also: tijdstempeling
Timestamping is assigning a precise instant to a network event. Software timestamping happens in the operating system and suffers from variable delay (jitter); hardware timestamping happens in the network card, close to the physical layer.
The difference is large: hardware timestamping brings PTP to the nanosecond, whereas software timestamping limits NTP to the millisecond.