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# Subnetting examples (class A, B and C)

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Compute the subnet mask, number of subnets and number of hosts in each subnet, in each of the given scenarios.

Scenario 1:
Required Number of Networks: 80
Minimum Number of Hosts: 3000

Scenario 2:
Required Number of Networks: 20
Minimum Number of Hosts: 800

Scenario 3
Required Number of Networks: 5
Minimum Number of Hosts: 25

https://brainmass.com/computer-science/c/subnetting-examples-class-a-b-and-c-182149

#### Solution Preview

If we breakup the 32 bit IP address as (net : subnet : host), then

number of hosts in each subnet = (2 ^ number_of_host_bits) - 2 , as host numbers consisting of all 0 and all 1 bits are reserved.

Similar restriction is also applied to subnets by older standards, however recent standards do allow use of all 0 bits and all 1 bits subnets. Hence,

number of subnets = (2 ^ number_of_subnet_bits) , as per recent standards.
number of subnets = (2 ^ number_of_subnet_bits) - 2 , as per older standards.

This answer is following recent standards.

Scenario ...

#### Solution Summary

Solution shows stepwise computations with detailed explanations, following which, the reader should be able to solve similar problems easily. It also has a brief comment about recent vs older subnetting standards.

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