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Subnetting of Class C in a very easy way.

Subnetting of Class C in a very easy way.

nabeel_ahmad
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Subnetting of Class C in a very easy way.

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  1. Subnetting Suppose there is a small business. In which we have three departments like Finance, Production, Sales. We have a Class C IP Address: 192.168.8.0/24 as we now class C has 24 subnet masks and we need three different networks. So, we need to find all possible: Hosts, Network IDs, Useable IP Ranges, Broadcast ID’s. So we will Draw a Table for this purpose. In Host we see every number is double with its next number and in Masks it is in Reverse order of Hosts. As we know Class C is 8 bit IP Address because The first 24 bits of the IP address are used for the network ID. The final 8 bits are for the host ID.

  2. Subnetting So we need to get THREE subnets but exact 3 in masks list is not available so we will go for the nearest which is 4 in 3rd column. 2 is also nearest but it will calculate less subnets that’s why we selected 4 to get extra but Not less as required.

  3. Subnetting So we re in 3rd POD.IP Address is 192.168.8.0/24 as we now class C is 24 subnet masks. So our all answers are in (4, 64, /26) /26 is the new subnet mask. For this 4 subnets.

  4. The IP Address is 192.168.8.0 Our Subnet Mask is /26 So we have 64 Hosts, Now Add 64 in 0 for next Network ID. The First Network ID Will Be our IP Address.

  5. Now Find Broadcast ID The IP Address is 192.168.8.0 -1=63 -1=127 -1=191 Our First Broadcast ID will be Next Network ID minus 1 like 64 - 1 = 63 And so on. Next 127,191,255

  6. Now Find No. of Useable Hosts The IP Address is 192.168.8.0 Our First Host and Last Host ID’s are reserved for Network ID and Broadcast ID so we subtract 2 from our Host which is 64. So our all usable hosts will be 64 -2 = 62.

  7. Now Find Host IP Ranges The IP Address is 192.168.8.0 Our First Host and Last Host ID’s are reserved for Network ID and Broadcast ID so we Our Host IPRanges will be from between Network ID and Broadcast ID.

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