From the course: Subnetting in Your Head

Unlock the full course today

Join today to access over 22,600 courses taught by industry experts or purchase this course individually.

Class A example: Steps 1–3

Class A example: Steps 1–3

From the course: Subnetting in Your Head

Start my 1-month free trial

Class A example: Steps 1–3

“

- [Instructor] For our class A example I'm going to use something that some people call 10 netting, because we're starting off with a network 10.0.0.0. As you may recognize that's one network that can support 16,777, 214 hosts, but I don't need 16,777,214 hosts. I need 500 hosts per subnet. So what I want to know is what would my subnet mask need to be? How many subnets would I create? And what would the addresses look like? So to determine what my subnet mask needs to be first I need to ask the first question in the four step method, which is where am I now. Where am I now is answered by the subnet mask slash eight. That means that right now I am at the end of the first octet in a hole between the last bit of the first octet and the first bit of the second octet. All of those bits to the left are network bits that won't be changed. The question is how many of those 24 bits to the right are going to need to be host bits and then how many will be left to be subnet bits? That will…

Contents