The sub netting procedure divides
a network into several sub networks in such a way that each of these subnets
has its own address. The subnet address is created by dividing the host address
into network address.
There are five steps in
subnetting:-
1. Requirement Analysis
2. Partitioning network address and host address
3. Determining the subnetting mask
4. Determining subnet address
5. Determining the host address for each subnet
For e.g. IP address is 211.71.9.0
And subnets that have to create
are 8 subnets by following the five steps:
1
Requirement
analysis: In this step which class has to
do subnetting and how many subnets will be there? The class A and class B avoid
creating subnetting because there are many host computers, and class C has the
minimum number of hosts. Subnets are always created in the power of 2.
Therefore 2*2*2=8 subnets
Convert the address into binary
format i.e. 11011011.01000111.00001001.00000000
2
Partitioning network address and host address: - 000.00000:- In this first three bits are assigned for
subnet bits and last five bits are assigned for host bits. So, 2*2*2*2*2-2=30 host computers.
3
Determining
the subnet mask
000 0000
111 0000 -224
Convert the subnet bits into 1’s:
255.255.255.0
255.255.255.224
4 Determine the address of subnet
211.71.9.0
000:00000-0
001:00000-32
010:00000-64
011:00000-96
100:00000-128
101:00000-160
110:00000-192
111:00000-224
Subnet Address:
211.71.9.0
211.71.9.32
211.71.9.64
211.71.9.96
211.71.9.128
211.71.9.160
211.71.9.192
211.71.9.224
5 Determining the host address:-
211.71.9.0
000 0000
000 11110-30
211.71.9.32
001 00001
001 11110-62
211.71.9.64
010 00001
010 11110-94
211.71.9.96
011 00001
011 11110-126
211.71.9.128
100 00001
100 11110-158
211.71.9.160
101 00001
101 11110-190
211.71.9.192
110 00001
110 11110-222
211.71.9.224
111 00001
111 11110-255
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