Question: What happens if a DNS doesn't know the IP address for a domain it is asked to look up? It sends an error message it

What happens if a DNS doesn't know the IP address for a domain it is asked to look up?\ It sends an error message\ it sends the request to other DNS servers and if they have the information, it saves it for later use\ it sends the request to your ISP\ it's fails silently and does nothing

What happens if a DNS doesn't know the IP address for a domain it is asked to look up? (A) It sends an error message B it sends the request to other DNS servers and if they have the information, it saves it for later use C) it sends the request to your ISP D it's fails silently and does nothing

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