CompTIA Network+ (N10-008) — Question 349

A network technician needs to ensure the company’s external mail server can pass reverse lookup checks. Which of the following records would the technician MOST likely configure?

Answer options

• A. PTR
• B. AAAA
• C. SPF
• D. CNAME

Correct answer: A

Explanation

The correct answer is A (PTR) because a PTR record is specifically used for reverse DNS lookups, associating an IP address with a domain name. The other options, such as AAAA, SPF, and CNAME, serve different purposes in DNS management and do not facilitate reverse lookups.