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Alexander Kallaway (Emelianov)10,307 Points
Why are there always 2 name servers?
This is just for general knowledge. Why is there always at least 2 name servers? Is it just in case that one fails, so that then users would be redirected to the second one? Or is there another reason?
Chris Shaw26,676 Points
Yes, in the case one of the nameservers went down your site should remain operational however some hosts don't set these up correctly and host everything at the same location which means if one goes down, everything goes down.
Generally though larger and more developed hosts don't have these issues as they use global DNS responders to ensure 99.99% uptime.
Hope that helps.