From the course: Subnetting in Your Head

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Class A example: Step 4

Class A example: Step 4

From the course: Subnetting in Your Head

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Class A example: Step 4

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- [Narrator] In our class A example, the first Subnet will be the same as the network address, only with the new Subnet Mask. The first Subnet will be 10 dot zero dot zero dot zero with the Subnet Mask of 255 dot 255 dot 254 dot 0, which can also be expressed as a slash 23. Now, the second Subnet and every Subnet after that will be determined by the Increment. The Increment is 256 minus the last number in the Subnet Mask that's not a zero. In this case, the last number in the Subnet Mask that's not a zero is 254. 256 minus 254 is two. In the Increment we'll be Incrementing in the third octet. Therefore, the next Subnet will be 10 dot zero dot two dot zero slash 23. What will the Broadcast, the Address right before the second Subnet, what will the Broadcast be? It'll be 10 dot zero dot one dot 255. Now, what happens is we think about the odometer again, we're going to spin out the tenths and so we're going to go from 10 dot zero dot zero dot zero to 10 dot zero dot zero dot one, two…

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