CompTIA Network+ (N10-007) — Question 268

Which of the following should be configured to allow for IP-to-name resolutions?

Answer options

• A. CNAME
• B. A
• C. PTR
• D. NS

Correct answer: C

Explanation

The correct answer is C, PTR records, which are specifically used for reverse DNS lookups to map an IP address back to a hostname. Options A and B, CNAME and A records, are used for different purposes: CNAME for aliasing and A for mapping hostnames to IP addresses. Option D, NS records, are for specifying authoritative name servers, not for IP-to-name resolution.