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‫Your patience pays off, subletting allows you to create multiple logical networks that exist within

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‫a single class A, B or 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 subletting 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 subnet.

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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 sub network ID.

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‫So I'll give you an example.

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‫Let's take a Class C network of one nine two one six eight, not 2.0, which has a natural mask of 255.255.255.0.

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‫You can create subnets by moving to 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 one nine two in decimal form.

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‫Now, the Network ID is 26 bit in Sidr notation.

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‫It's now a slash 26 sub network.

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

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‫The number of sub networks 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 some networks.

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‫Thus, creating two to the power of two possible subnet.

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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 sub that bits are used for dressing hosts within a subnet.

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‫So the who's part of the IP address is six bit all zeros, and the all one's values for the host I.D.

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‫are not allowed in a sub network.

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‫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 sub networks 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 Sub Network one nine two one six eight two point

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‫one to age 26 will be between 192.168.0.1 to nine and 192.168.0.1 nine zero.