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N10-005 · Question #362
N10-005 Question #362: Real Exam Question with Answer & Explanation
The correct answer is C: PTR. PTR (Pointer) records are DNS record types that map an IP address back to a hostname, enabling reverse DNS lookups.
Question
Which of the following records allows for reverse DNS lookups?
Options
- AAAAA
- BA
- CPTR
- DCNAME
Explanation
PTR (Pointer) records are DNS record types that map an IP address back to a hostname, enabling reverse DNS lookups.
Common mistakes.
- A. AAAA records perform forward DNS lookups by mapping a hostname to an IPv6 address, not an IP address to a hostname.
- B. A records perform forward DNS lookups by mapping a hostname to an IPv4 address, which is the opposite of a reverse lookup.
- D. CNAME (Canonical Name) records create an alias from one hostname to another hostname and are used for forward lookups, not reverse DNS resolution.
Concept tested. DNS PTR record for reverse DNS lookup
Reference. https://learn.microsoft.com/en-us/windows-server/networking/dns/manage-resource-records
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