Subnetting Calculation

Using Fixed Length Subnet Mask (FLSM)

Assume the IP Address of Online Learning System Server is  210.22.15.0.

The IP Table:

Subnet Number	IP Number
0	Network Address: 210.22.15.0 IP-Address: 210.22.15.1 to 210.22.15.62 Broadcast Address: 210.22.15.63
1	Network Address: 210.22.15.64 IP-Address: 210.22.15.65 to 210.22.15.126 Broadcast Address: 210.22.15.127
2	Network Address: 210.22.15.128 IP-Address: 210.22.15.129 to 210.22.15.190 Broadcast Address: 210.22.15.191
3	Network Address: 210.22.15.192 IP-Address: 210.22.15.193 to 210.22.15.254 Broadcast Address: 210.22.15.255

1.The class of IP Address: Class C

2. Default Subnetting Mask for IP address: 255.255.255.0

3. Quantity of subnet: Assume 4 subnet

4. Quantity of bit borrowed: 2

Formula to calculate 

2^bb = Number of subnet

2^2 = 4

5. Quantity of host for each subnet: 62

By using formula 

2^bit left - 2

2^6 - 2 = 62