How ip addresses and subnet masks interact

When an ip host is configured,a subnet masks is assigned along with an ip address.Like the ip address.The subnet mask is 32 bits long.The subnet mask signifier which part of the ip adress is network  and which part is host.in other hand A subnet mask is a number that defines a range of ip addresses that can be used in a network.
The subnet mask is compared to the ip address from left to right,bit for bit.The is in the subnet mask represent the network partion.The os represent the host partion.In the example shown ,the first in three octets are network,and the last octet represent the ho