The next DNS server says it knows the IP address and sends the request back to the computer.If it doesn’t know the IP address of the domain it will forward it on to the next DNS server. This can be your local Active Directory DNS server or your ISP DNS server. The DNS server that the client uses may not know the IP address.This will send a query to the DNS server to go fetch the IP address for DNS will take the easy to remember name and map it to the IP address so devices can communicate.īelow I walk through how a computer uses DNS to resolve names. It would be hard to remember the IP address of every website or resource you access, domain names are easier to remember. It will help you identify if it’s a client, a local DNS issue, or another DNS server (forwarding server or ISP).Ĭomputer and other network devices communicate by IP address. Understanding how DNS works will help you troubleshoot DNS issues faster. How to use nslookup to check DNS records.Why you must learn the nslookup command.

I’ll show you how to check several DNS record types (A, PTR, CNAME, MX, etc) by using the windows nslookup command.Īnd in this post, I’ll show you how to use nslookup against your local DNS server and an external DNS server (great tip for troubleshooting). In this tutorial, you will learn how to use nslookup to check DNS records.

How to check added dns servers mac