Why do I have 2 DNS servers?
In most cases, a primary and a secondary DNS server are configured on your router and/or computer when you are connected to your internet service provider (ISP).
There are two DNS servers in case one of them happens to fail, in which case the second is used to resolve hostnames you enter.
Can you have multiple DNS servers?
At a minimum, you’ll need two DNS servers for each Internet domain you have. You can have more than two for a domain but usually three is tops unless you have multiple server farms where you would want to distribute the DNS lookup load. It’s a good idea to have at least one of your DNS servers at a separate location.
How many DNS servers exist?
How Many DNS Servers Are There? There are a couple of reasons the internet Domain Name System uses exactly 13 DNS servers at the root of its hierarchy: The number 13 was chosen as a compromise between network reliability and performance, and 13 is based on a constraint of Internet Protocol (IP) version 4 (IPv4).
What is my primary DNS and Secondary DNS?
Type “ipconfig /all” at the command prompt, then press the “Enter” key. 3. Look for the field labeled “DNS Servers.” The first address is the primary DNS server, and the next address is the secondary DNS server.