An IP address contains two portions, one is the network portion and the host portion. Each of these IP addresses Class A, Class B and Class C include the subnet mask. The default subnet mask of these classes is as under:
Class A is denoted as 255.0.0.0
Class B is denoted as 255.255.0.0
Class C is denoted as 255.255.255.0
Tips to follow for subnetting:
The subnet mask is used to determine the type and the number of IP address to be allocated to a local network. Dividing a large network into smaller sub-networks offer the following benefits:
a. It reduces the network traffic by reducing the volume of the broadcasts.
b. Enable the users to access a work network from their homes without opening the complete network.
c. It helps to surpass the constraints in the Local Area Network (LAN).