200-301 Question #398: Real Exam Question with Answer & Explanation

The correct answer is D: responds to a request for IP address to domain name resolution to the DNS server. A DNS lookup operation involves a DNS client querying a DNS server to translate a domain name into its corresponding IP address. The DNS server then provides the requested IP address, enabling the client to connect to the desired resource.

Submitted by jaden.t· Mar 5, 2026IP Services

Question

What is a DNS lookup operation?

Options

ADNS server pings the destination to verify that it is available
Bserves requests over destination port 53
CDNS server forwards the client to an alternate IP address when the primary IP is down
Dresponds to a request for IP address to domain name resolution to the DNS server

Explanation

A DNS lookup operation involves a DNS client querying a DNS server to translate a domain name into its corresponding IP address. The DNS server then provides the requested IP address, enabling the client to connect to the desired resource.

Common mistakes.

A. Pinging a destination to verify availability is an ICMP operation, not a DNS lookup.
B. While DNS uses port 53, 'serves requests over destination port 53' describes a characteristic of the DNS service, not the lookup operation itself.
C. Forwarding clients to alternate IP addresses for redundancy or failover is a function of certain network services or load balancers, not the primary definition of a DNS lookup.

Concept tested. DNS name resolution process

Reference. https://learn.microsoft.com/en-us/windows-server/networking/dns/what-is-dns

Topics

#DNS lookup#Name resolution

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