What is a DNS lookup operation?

Posted by: Pdfprep Category: 200-301 Tags: , ,

What is a DNS lookup operation?
A . DNS server pings the destination to verify that it is available
B . serves requests over destination port 53
C . DNS server forwards the client to an alternate IP address when the primary IP is down
D . responds to a request for IP address to domain name resolution to the DNS server

Answer: D

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