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> Sure, if you run an air-gapped network in some military facility, you can get things working without DNS, but 99.999% networks can't work without a DNS.

It's funny you say that, because in the air-gapped network in some military facility I work in, we actually replicate certain public DNS entries to have some specific systems and services working for our developers.

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Of course, you want SNMP monitors get you and email as an alert, you have to setup auth DNS with xyz.local and use it in air-gapped environments for your alert mails. Hard drive failure?, RX/TX errors on a switch port? fire up mail over SMTP with an SNMP agent, etc. the list goes on and on.

Network without DNS is un-useable. Apologies for my english, it is not my native language.

> you have to setup auth DNS with xyz.local and use it in air-gapped environments for your alert mails

True, but I was talking more about creating DNS entries for NPM (and other package managers) and redirecting them to our internal services. I just thought it was funny to mention since we impersonate public sites on our internal air-gapped network.

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