The DNS servers interpret the ISP URL Domain name and provide the appropriate IP address number.
[2] This computer holds records of all the user accounts within the domain, their rights to access information, and lists of approved System Operatives.
[3] Multiple replication servers connect to these control computers and they are routed to the Internet backbone to provide the requested data to and from the domain.
A PDC uses a number of special computer programs to announce its presence to other domain controllers.
It uses Windows Internet naming service WINS[5] and Browser[6] services to allow other computers to gain access to digital information that it has control over.