CompTIA Network+ (N10-007) — Question 645

An administrator is working on an email migration project and needs to verify if the new MX records have propagated across the public DNS servers. Which of the following is the MOST appropriate software tool for the administrator to use?

Answer options

• A. iptables
• B. nslookup
• C. PathPing
• D. netstat

Correct answer: B

Explanation

The correct answer is B, nslookup, which is specifically designed to query DNS records, making it ideal for checking MX record propagation. Options A (iptables) and D (netstat) are network utility tools that do not provide DNS query capabilities, while C (PathPing) is used for network diagnostics rather than DNS record verification.