Forest Root Zone for _msdcs
In Active Directory, all client logons and lookups are directed to local domain controllers and Global Catalog servers through references to the SRV records in DNS. These SRV records were stored in a subdomain to an Active Directory domain that is known as the _msdcs subdomain.
In Windows Server 2012, _msdcs is a separate zone in DNS, as shown in Figure 10.14. This zone, stored in the application partition, is replicated to every domain controller that is a DNS server. This listing of SRV records was moved mainly to satisfy the requirements of remote sites. In Windows 2000, these remote sites had to replicate the entire DNS database locally to access the _msdcs records, which led to increased replication time and reduced ...
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