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Subnetting Made Easy
Now that we can count in binary lets do some subnetting, it is as easy as pie!
With the following address (196.168.36.89/26) we can determine how many subnets are available, hosts per subnet, and the broadcast address for each subnet.
We will start with the following table to determine all of the above.
Notice that this address is written in CIDR (/26) which simply means that we have a total of 26 bits turned on in the subnet mask.
We started with a Class C address and default subnet mask, then borrowed 2 bits for subnetting. We now take those 2 bits and apply them to our subnet mask and can see that the address may be written as follows:
196.168.36.89
255.255.255.192
128 + 64 = 192
| 128 |
64 |
32 |
16 |
8 |
4 |
2 |
1 |
| 1 |
1 |
0 |
0 |
0 |
0 |
0 |
0 |
On the next page we will see the easy way to determine how many valid subnets and host ranges within those subnets, and never use a calculator!
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