From the course: Subnetting in Your Head

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Class C example: Steps 1–3

Class C example: Steps 1–3

From the course: Subnetting in Your Head

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Class C example: Steps 1–3

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- [Instructor] By far the best way to understand this method is by applying an example. So let's look at a Class C example. So what if we had one network 192.168.1.0/24, but what we wanted were eight subnets. Then what would our subnet mask need to be, how many hosts would we end up with per subnet, and what would be the addresses that would actually be in the subnet? Now we're going to use the four step method. So the first step is where am I now? We're going to determine where we are based on the subnet mask. Since the subnet mask is a slash 24 which is equivalent to 255.255.255.0, we are therefore in a hole between the end of the third octet and the beginning of the fourth octet. That's where we start. So the next question is how many of these bits moving from the left toward the right in the fourth octet are we going to need to use to create eight subnets? That formula is always the same. It's two to the power of S, has to be greater than or equal to the number of subnets. In this…

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