Why do some recursive queries involve a root server?
What will be an ideal response?
The reason some recursive name queries involve a root server is not because the root servers keep all names in the entire DNS namespace close at hand. Rather, it is because a root server always knows how to find whatever DNS server is authoritative for the domain (or subdomain) where the actual data resides. Thus, if all else fails, the root can definitely help get the query resolved.
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