Using Secondary Zones in an AD DS Environment
Certain situations in Active Directory require the use of secondary zones to handle specific name resolution. For example, in peer-root domain models, where two separate trees form different namespaces within the same forest, secondaries of each DNS root were required in Windows 2000 to maintain proper forestwide synchronization.
Because each tree in a peer-root model is composed of independent domains that might not have security privileges in the other domains, a mechanism will need to be in place to allow for lookups to occur between the two trees. The creation of secondary zones in each DNS environment will provide a solution to this scenario, as illustrated in Figure 10.15. Windows Server 2012 ...
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