THE DEFAULT MASK FOR EACH CLASS DEFINES THE NUMBER OF NETWORKS AND THE NUMBER OFHOSTS FOR EACH NETWORK
223).The default mask for each class defines the number of networks and the number ofhosts for each network. An IP address contains information about the network on whichthe host resides, and the address of the host.The network ID is the reference to the logicalsubnet, and it refers to the octets that are predefined as the network ID and implementedwith the default mask.The remaining octets are for the hosts. Figure 3.10 illustrates the net-work and host IDs.