Stratum 0 is the reference clock itself; stratum 1 is an NTP server attached to one or more reference clocks. https://www.ntp.org/ntpfaq/ntp-s-algo/#5111-what-i

Stratum 0 is the reference clock itself; stratum 1 is an NTP server attached to one or more reference clocks. https://www.ntp.org/ntpfaq/ntp-s-algo/#5111-what-is-a-reference-clock https://www.ntp.org/ntpfaq/ntp-s-algo/#5111-what-is-a-refere...