What is the "reach" value in "ntpq -p" output?

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The value of reach column in ntpq -p or peer command inside ntpq shell represents the status of the last 8 NTP transactions between the NTP daemon and a given remote time server. It is an octal representation. Each bit in its binary representation is a boolean value, where a 1 indicates a successful transaction and a 0 indicates a failure. Each t...

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