CompTIA Network+

Answer: D -The dig command is used to troubleshoot DNS problems because of its flexibility, ease of use, and clarity of output.

Key Takeaway: Dig is a tool for querying DNS nameservers for information about host addresses, mail exchanges, nameservers, and related information. This tool can be used from any Linux, Unix, or Macintosh OS X operating system. The most typical use of dig is simply to query a single host. Netstat is a useful tool for checking your network configuration and activity. Mtr combines traceroute and ping into a single network diagnostic tool. Route command is used to add and delete routes.