Absolutely you can, in fact it’s very much advised to have 2 DNS servers running on separate networks.
Basically all you’ll need to do is find another DNS provider, setup your DNS there the same as it is at Namecheap, and set the secondary DNS server on Namecheap to your new DNS provider.
Can I 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.
Can you mix DNS servers?
Most DNS services offer resolvers at two IP address – for instance, Google DNS is available at 8.8. 8.8 and 8.8. In fact, you may also mix servers – like you can use Google Public DNS as the Preferred DNS server and OpenDNS as your Alternate DNS server.
What is a secondary DNS?
The secondary (slave) DNS server is an authoritative server that obtains information about a zone from the primary server via zone transfer. (RFC 2182) The secondary DNS server is slaved to the primary server.
Why are there multiple nameservers?
Most likely you actually have multiple servers hosting different services in your domain. It’s likely your mail services are running on different servers than your web services, for example. So, then, when your web server goes down your mail is likely to continue to flow.
Why would you activate more than one NIC?
If a NIC fails, it could potentially sever an important connection. One way to lessen the potential for these problems is to install two or more NICs in network servers. Using multiple NICs offers these key benefits: Load balancing.
How many DNS servers does the Internet have?
13 DNS servers