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DNS Usage & link between DNS & sub-mask

By dinesh.dhamija ·
I have got a doubt whether the sub-net mask is used only to seperate different LANs in a WAN or it has got some connection with Differentiation of Domains. I mean, in a WAN, is it mandatory that Different domains will have different & unique subnet mask.

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DNS Usage & link between DNS & sub-mask

by McKayTech In reply to DNS Usage & link between ...

DNS and subnet masking are really separate issues. A DNS record only associates a hostname with a particular IP address (or addresses) and does not involve a subnet mask.

Subnet masking is for dividing the IP address space into manageable chunksand keeping the routing in order to get to that address.

So to answer your question, no, it is not mandatory that different domains have a different and unique subnet mask.

Nor is it even necessary that their IP addresses be unique. For example, you could have an Exchange server sitting at a particular IP address receiving mail for many different domains. For all of those domains, the MX record would point to the same IP address.

I hope this helps answer your question.

paul

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DNS Usage & link between DNS & sub-mask

by dinesh.dhamija In reply to DNS Usage & link between ...

Ur answer deserves a 100%.
thanks for clearing my doubt.
Dinesh

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DNS Usage & link between DNS & sub-mask

by dinesh.dhamija In reply to DNS Usage & link between ...

Point value changed by question poster.

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DNS Usage & link between DNS & sub-mask

by dinesh.dhamija In reply to DNS Usage & link between ...

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