nmap result : what does "uptime" suggest?

If I nmap a host, after that it outputs an "Uptime" also. What does it suggest, is it trustworthy? Does it offers proper times?

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2019-12-02 02:48:05
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Uptime is the moment that the system has actually been "up" and also running. So, an uptime of 100 hrs suggests the equipment has actually been running non - stop for 100 hrs.

Nmap presumes the uptime of the system. According to the Usage and Examples web page :

The uptime hunch is classified a "hunch" due to the fact that numerous variables can make it entirely imprecise.

I take that to suggest it is not trustworthy. It can be handy, though.

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2019-12-03 04:08:21
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Some OS is usage uptime of the equipment as a base of series numbers in particular packages. That is practically a details leakage, yet they do it anyhow for in reverse compatibility is purpose. So these instances, uptime observed by NMap is in fact fairly exact.

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2019-12-03 04:07:58
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