SUBNETTING CALCULATION

In this section, you are expecting to show the calculation on how to identify the IP address that was assigned for the OnlineLearning System Server based on the information given in the project scenario. Explain the concept and show the calculation to identify the IP address.

Referring back to the graphic, our group produce that the OUM network had several departments. The department based on the list below: 

1.  Information Technology department

2.  Business and Management department

3.  Education and Social Sciences

4.  Applied Sciences

5. IT Centre

6.  Student Welfare

7.  Student Residential College

8.  OUM Cafeteria

based on all 8 department above , we need 8 subnet to be user in the network. So,  to calculate the subnetting we can use the fixed-length subnet mask(FLSM). A fixed-length subnet mask (FLSM) is a sequence of numbers of unchanging length that streamlines packet routing within the subnets of a proprietary network. A subnet can be a geographically defined local area network (LAN). The subnetting can be define as bellow:

Calculate subnet (FLSM): we asume that LAN use the ip-address start with 192.168.0.0

 step 1: defined subnet to be borrowed

- subnet borrow 3 bits

- Subnet and host = SSSH HHHH

 

step 2: find the number of subnet needed

- Number of subnets: 2^N 

- N = number of bits borrow

= 2³ = 8

 

step 3: find the number of subnet mask

- Subnet mask:

= 3 bits = 128 + 64 + 32 = 224

=255.255.255.224

 

step 4: find the total number of host 

- Number of hosts: 2^H 

- H = number of host on the subnet

= 2⁵ = 32

 

step 5: find the number of usable host

- Number of usable hosts:

= 32 – 2 = 30

step 6: Prepare the addressing table

Subnet	Network address	First address	Last address	Broadcast address
Subnet 0 - 1	192.168.0.0	192.168.0.1	192.168.0.30	192.168.0.31
Subnet 1 – 2	192.168.0.32	192.168.0.33	192.168.0.62	192.168.0.63
Subnet 2 – 3	192.168.0.64	192.168.0.65	192.168.0.94	192.168.0.95
Subnet 3 – 4	192.168.0.96	192.168.0.97	192.168.0.126	192.168.0.127
Subnet 4 – 5	192.168.0.128	192.168.0.129	192.168.0.158	192.168.0.159
Subnet 5 – 6	192.168.0.160	192.168.0.161	192.168.0.190	192.168.0.191
Subnet 6 – 7	192.168.0.192	192.168.0.193	192.168.0.222	192.168.0.223
Subnet 7 – 8	192.168.0.224	192.168.0.225	192.168.0.254	192.168.0.255

example picture: