The recursive query of the DNS query expects the requested resource record in the response or an error message.
A recursive query is a query defined by Union All with an initializing full select that triggers recursion.
In a recursive DNS lookup where the FROM clause of the iterative full select contains a direct reference to itself, the DNS server communicates with multiple other DNS servers to look up an IP address and sends it to the client. return. This is in contrast to repeated DNS queries where the client communicates directly with each DNS server involved in the lookup.
A recursive DNS query is a request from a client for a website that either responds with the answer it is looking for (the IP address associated with the corresponding website name or Uniform Resource Locator (URL)) or with an appropriate error message. should be returned.
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