An unauthorized DHCP server may either lease incorrect IP addresses to clients or negatively
acknowledging DHCP clients. Clients that obtain a configuration lease from the unauthorized
server can fail to locate valid domain controllers, preventing clients from successfully logging on
to the network. For the directory authorization process to work properly, it is necessary that the
first DHCP server introduced on to your network participate in the Active Directory service. The
server must be installed as either a domain controller or a member server.
The AD database contains all information about objects in all the domains from logon
authentication to objects in the directory. A hierarchical structure made up of multiple
domains that trust each other is called a tree. A set of object definitions and their associated
attributes is called a schema. All domains in a tree will share the same schema and will have
a contiguous namespace. A namespace is a collection of domains that share a common root
name. An example of this is support.troytec.com, marketing.troytec.com, and troytec.com. ...
Windows 2000 clients use DNS for name resolution and locating domain controllers for logon. In
the DNS, the clients are resolvers and the servers are name servers. DNS uses three components:
resolvers, name servers, and the domain name space. A resolver sends queries to a name server.
The name server returns the requested information, a pointer to another name server, or a failure
message, if the request cannot be satisfied.