After you complete this process you are prompted to enter a DNS domain name for the Active Directory domain that you are connecting to and promoting the server. It is possible to install DNS on servers that are not domain controllers including non-Windows servers but to install DNS on domain controllers allows the use of AD-integrated lookup zones see below which improves security and simplifies Clear zone replication Like Rings range. The DNS namespace takes the form of a tree that much like a file system has its root on top. BIND9 is a ground-up rewrite of BIND with complete DNSSEC support in addition to other features and enhancements. To resolve the name like webserver.xyz.com inside my local network I would have a DNS record inside the XYZ domain zone. When completing this process you are prompted to specify a DNS domain name for the Active Directory domain for which you are joining and promoting the server.It is possible to install DNS on servers which are not DCs including non-Windows servers but installing DNS on DCs allows the use of AD-integrated lookup zones see below which improve security and simplify zone replication.The DNS namespace takes the form of a tree that much like a file system has its root at the top.BIND9 is a ground-up rewrite of BIND featuring complete DNSSEC support in addition to other features and enhancements.To resolve Names like webserver.xyz.com inside my local network i should have a DNS record inside the xyz domain zone.