Computer Networks Question:

To create or to perform subnet addressing the local address should be divided into a number identifying the physical network and a number identifying the host on the subnet.

Then the senders route messages to the advertised network address, and the local system takes responsibility for routing messages to its subnets and their hosts. We need to consider the number of subnets and the number of hosts on the subnet at the time of deciding how to partition the local address into subnet address and host address.