Digital Router Interview Question:

Explain what is a subnet mask?

Submitted by: Muhammad

A subnet mask tells the network how big it is. When an address is inside the mask, it will be handled internally as a part of the local network. When it is outside, it will be handled differently as it is not part of the local network. The proper use and calculation of a subnet mask can be a great benefit when designing a network as well as for gauging future growth.
Submitted by: Muhammad