CompTIA Network+ (N10-008) — Question 412

Which of the following records can be used to track the number of changes on a DNS zone?

Answer options

• A. SOA
• B. SRV
• C. PTR
• D. NS

Correct answer: A

Explanation

The SOA (Start of Authority) record contains a field that indicates the serial number, which is incremented whenever changes are made to the DNS zone. The other record types, such as SRV, PTR, and NS, serve different purposes related to service location, reverse DNS lookups, and name server delegation, respectively, and do not track changes.