With 2 bits turned on we get 4 subnets and with 6 bits turned off we may have 64 hosts per network.
Keep in mind that if you are using a Microsoft® RAS or RRAS server all subnets will not be available.
If you are using a Cisco® router with a 10.3 IOS or older then the first and the last subnet are not available unless the ip subnet-zero command is used.
The following will illustrate the subnets and their host ranges as well as the broadcast address for each subnet.
The following 2 formulas are still representative of what the books still will read, even though those days are pretty much gone with the new Cisco® IOS.
| Network number | Host range | Broadcast address |
|---|---|---|
| 196.168.36.0 | 196.168.36.1 thru 196.168.62 | 196.168.36.63 |
| 196.168.36.64 | 196.168.36.65 thru 196.168.126 | 196.168.36.127 |
| 196.168.36.128 | 196.168.36.129 thru 196.168.190 | 196.168.36.191 |
| 196.168.36.192 | 196.168.36.193 thru 196.168.254 | 196.168.36.255 |
