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Your patience pays off.

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Subnetting allows you to create multiple logical networks that exist within a single class A, B or

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C network.

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If you do not subnet, you are only able to use one network from your class A, B or C network, which

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is well, pretty unrealistic.

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So subnetting is the process of designating some high order bits from the host part as part of the network

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prefix and adjusting the subnet mask appropriately.

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So this divides a network into smaller subnets.

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In other words, in order to subnet a network, extend the natural mask with some of the high order

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bits from the host ID portion of the address in order to create a subnetwork ID.

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So I'll give you an example.

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Let's take a class C network of 192.168.2.0, which has a natural mask of 255.255.255.0.

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You can create subnets by moving two bits from the host part to the network prefix.

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Now, the last octet of the network mask starts with 11.

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So this eight bit corresponds to 192.

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In decimal form.

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Now the network ID is 26 bit in Cidr notation.

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It's now a slash 26 subnetwork.

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You can find the network prefix by a bitwise and operation between the IP address and the subnet mask.

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The number of subnetworks available and the number of possible hosts in a network may be readily calculated.

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In our example, two bits were borrowed to create Subnetworks.

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Thus creating two to the power of two possible subnets.

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You with me.

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So now let's calculate the maximum number of hosts for each subnet.

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In our example, 26 bits are used to define the network.

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The remaining bits after the subnet, bits are used for dressing hosts within the subnet.

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So the host part of the IP address is six bit all zeros and the all ones values for the host ID are

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not allowed in a subnetwork right.

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These two values are reserved for the network address and broadcast address respectively.

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So the maximum number of hosts which can be addressed in these subnetworks is two to the power of six

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minus two, which equals 62.

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Excellent.

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So as a result, the IP addresses of the devices in the subnetwork.

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192.168.2.128 slash 26 will be between 192.168.2.129 and 192.168.2.190.