SUBNETTING CALCULATION

Students are required to suggest private addressing scheme used in OUM network. Explain how you calculate the subnetting using FLSM based on the number of the faculties. Each faculty is given their network address. Assign IT Center as another subnet with their own network address. From this network address, assigned as the 4 th available address as the address of the OnlineLearning System Server.

Calculate Subnetting

Step 1 : Choose IP Address for OUM network.

Network Id : 192.158.1.0/24

Subnet Mask : 255.255.255.0

Faculty = 10

Step 2 : Calculate borrow bit.

• 10 subdivide means that there are 10 subnet. So, the requirement is 2^n, which is n must be greater or equal to 10. we will take 2^4 which is greater than 10 as our subnet.

There are 10 Faculty because there are 10 subdivide. So the borrow bits will be 4 and the new subnet will be 28.

• New Network Id : 192.158.1.0/28

Step 3 : Calculate new subnet mask.

Default Subnet Mask : 255.255.255.0

New Subnet Mask : 255.255.255.240

For this one, we will not disturb because 128+64+32+16+8+4+2+1 = 255.

From our first calculation at step 2, we have borrow 4 bits from 8 bits which will left another 4 bits as host bit. 

128+64+32+16=240

So, the new subnet mask will be 255.255.255.240.

Step 4 : Find the available address from the table.

Host per subnet : 

2^n -2 (Formula)

2^4 - 2 = 14

• n=4 (host bit)

Because IT Centre is assigned the 4th subnet address, So, the network Id will be 192.158.1.48 Given that the OnlineLearning System's server is assigned the 4th available address, the OnlineLearning System's server address is 192.158.1.52.