CompTIA Network+ (N10-009) — Question 323

A help desk technician receives a report that users cannot access internet URLs. The technician does some ping tests and finds that sites fail when a URL is used but work when an IP is used. Which of the following tools should the technician utilize next?

Answer options

• A. tcpdump
• B. tracert
• C. nmap
• D. dig

Correct answer: D

Explanation

The correct answer is D, 'dig', which is used for querying DNS servers to troubleshoot domain name resolution issues. Since the problem lies with accessing URLs, indicating a potential DNS issue, 'dig' will help diagnose this. The other options, while useful for different types of network diagnostics, do not specifically address DNS resolution.