Why must a subnet have a name? What are its components? Windows 2000 uses IP subnets as the basis for creating Active Directory sites, and each subnet must have a unique identifier (the subnet name) to differentiate it from other subnets.
The subnet name is expressed in Classless InterDomain Routing
(CIDR) format, with the network number followed by a slash and the number of bits to be used for the network ID. NT administrators who are familiar with TCP/IP subnetting will recognize this subnetting method.