SRV Records and Site Resolution
All AD DS clients use DNS for any type of domain-based lookups. Logons, for example, require lookups into the Active Directory for specific SRV records that indicate the location of domain controllers and Global Catalog servers. Windows Server 2012, as previously mentioned, divides the location of the SRV records into a separate zone, which is replicated to all domain controllers that have DNS installed on them.
Subdomains for each site are created in this zone; they indicate which resource is available in those specific sites, as shown in Figure 10.16. In a nutshell, if an SRV record in the specific site subdomain is incorrect, or another server from a different site is listed, all clients in that site are forced ...
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