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Concise Guide to DNS and BIND, The by Nicolai Langfeldt

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How Resolution Works

After you have divided DNS into zones forward and reverse, and they all are redundant and working well, you need a way to get from one zone to another. This mechanism is vital to DNS, and it is vital that you understand it and how important it is because it will help you solve many of the DNS problems you encounter. Several of the questions found in Internet forums about DNS stem from not understanding this linkage and the importance of it being all there and working.

As mentioned earlier, DNS is similar to a tree data structure as used in programs. It has a root node and edges that are used to descend the tree from the root to other nodes and find the data requested.

When a piece of software requests a piece of information ...

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