# Subnetting examples (class A, B and C)

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

Network Address: 10.0.0.0

Scenario 2:

Required Number of Networks: 20

Minimum Number of Hosts: 800

Network Address: 141.15.0.0

Scenario 3

Required Number of Networks: 5

Minimum Number of Hosts: 25

Network Address: 198.171.10.0

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.