DNS forwarding

Exam Alert

You cannot configure a DNS server as a forwarder if a root zone exists. If you plan to configure your DNS server as a forwarder, you must delete the root zone. Open the forward lookup zone in the DNS console. The root zone entry is identified as ".". To delete the root DNS zone, right-click this entry and click Delete.

There is no more explanation. That is from Exam Cram. Just wondering why this is so? Also, I am about to take the test next week. I am really nervous about it, and wondering how many questions will I encounter about IP subnetting. I don't get it at all.

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Comments

sprkymrk

I think if you have a root zone on a DNS server, unless you have a good reason for it, it is basically misconfigured. I have seen (and made) this mistake. It usually happens when you install DNS on a server that has no Internet/LAN connectivity. It thinks it is the "root" server, or king of the world. There are only 13 root zone servers that are "top" of the food chain for the Internet.

So if you think about it, how could a root server function as a forwarder?

http://www.isoc.org/briefings/019/