Help on finding the number of subnets in a network.
The number of subnets depends on the number of EXTRA 1s in the subnet mask (compared to the default subnet mask). To calculate the number of subnets for a given network address and subnet mask, follow the the steps below.| Step | Detail |
|---|---|
| 1 | a) Convert the default subnet mask into binary. |
| b) Convert the given subnet mask into binary. | |
| c) Find the number of EXTRA 1s (also known as, bits borrowed) in the given subnet mask compared to the default subnet mask. Let's say, the number of EXTRA 1s is x. | |
| 3 | The number of subnets in the network = 2^x. |