Internal and External DNS
Here is probably an easy question if anyone can help me out. I have done tons of reading but nothing really helps answers this question: What is purpose of Internal and External DNS?
I know you need DNS to translate computer/server names to IP addresses and store the records. So why do you need 2 internal and 1 external DNS? I do understand about having an internal DNS for internal network but what about the external DNS?
Also, why do you need 2 DNS inside the network? Can you have one internal DNS and make that your primary and if it can't find the record then have that one point to your external DNS in the DMZ?
Am I making some sense or am I just confused? I think I need a quick school lesson on DNS. I feel embarrassed to ask. Thanks for all of your help.