son to a device of Stratum 0. Every new layer adds a 1 to the stratum value.</p>
<p>Reference clocks are not directly connected to the network. Instead, the so-called <em>primary time servers</em> connect to the reference clock and synchronise their clocks with it. These servers have a stratum value of 1. For each layer you go down the chain, the stratum value increases by 1, since the distance from the reference clocks augments.</p>
<p><img src="Resources/Images/NTP/Hierarchy.png" alt="" /></p>
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