Importance and representation of subnet mask.

Asked By 7060 points N/A Posted on -

Why subnet mask is important for IP addresses? How is a subnet mask is represented? What are the default subnet masks for the class A,B and C types of IP addresses?

Answered By 10 points N/A #81123

Importance and representation of subnet mask.


Hi Sarah,

A subnet mask divides the network into parts,  which are crucial for performance and security purposes of the network. It also helps in identification of the network a computer is operating in and the routing tables.

Class A subnet Mask is, Class B subnet Mask is and Class C subnet mask is

For class A, the subnet mask can support a wide range of computers in the network, in class B, the subnet can support quite a substantial number of computers but not like in A, but it is obviously more capable that C which holds a smaller number of PCs.

Hope this helps.



Lee Hung.

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