Cisco 200-901 Question Answer
Which two query types does a client make to a DNS server? (Choose Two)
AAAA
ACK
DISCOVER
Inverse
PTR
Clients make several types of queries to DNS servers. The two relevant types here are:
AAAA: This query type requests the IPv6 address associated with a domain name.
PTR: This query type is used for reverse DNS lookups, where it maps an IP address to a domain name.
AAAA (Quad-A) records store IPv6 addresses of a domain.
PTR (Pointer) records are used in reverse DNS lookups to map IP addresses to the corresponding domain names.
References: DNS and BIND by Cricket Liu and Paul Albitz, Cisco DevNet Associate Certification Guide.
TESTED 17 Aug 2025
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