title: WHAT is "IN" in DNS records?
body: <p>What is the proper meaning of the &quot;IN&quot; word in DNS records? DNS records are an important part of DNS zones. So I want to know that there is an &quot;IN&quot; word included in every record. what is the meaning?</p>
  <p>It would help clarify what such a piece of information in DNS is?</p>
  <p>Thank you for making all the efforts.</p>