I use multiple nameservers for a critical domain. We use 5 nameservers.
If I have 5 nameservers listed with our registrar, is it the case that the 5th nameserver will not be used by any visitors (dns resolvers), unless the first 4 are down or unavailable?
Can I count on this order to remain intact?
Meaning... If the first nameserver (let's call it ns1) is responding adequately, then everybody would use ns1, and nobody would use ns5, unless ns1-ns4 were down.
I want the 5th server only to be queried for dns if the first 4 are completely out. Please let me know if this is how authoritative nameservers are designed to be used.