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You are here: Home / CompTIA / Network+ / Section IV: Network Management / Chapter 23: Software Troubleshooting Tools / DNS Troubleshooting Tools

DNS Troubleshooting Tools

One of the most common communication types over the Internet involves DNS (Domain Name Service) traffic, in which hosts request the IP address based on the name of a website. There are two utilities that can help in the DNS troubleshooting process:

  • Nslookup
  • Dig (domain information groper)

These two utilities are very similar in functionality, so you can usually use one or the other. Nslookup and dig provide information about:

  • IP addresses that are being resolved
  • Canonical names configured in the DNS servers
  • Cache timers

Nslookup . . .

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