Basic Name SErver Question

I have a name server question which is pretty basic but I've never really been sure about it.

Let's say I have a Web server and my company domain name is example.com. I go to my domain registrar and register the name servers ns1.example.com and ns2.example.com using two IPs on my server.

My question: Do I need to add A records for ns1.example.com and ns2.example.com pointing to the corresponding IPs or is this unnecessary? I know it won't hurt anything to do it, I'm just wondering if it's required or not.

 

 

 

 

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