From the course: Networking Foundations: IP Addressing
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VLSM
- [Instructor] In the last section, we learned how we can steal bits from the host portion of the IP address in order to identify new sub networks. We also saw how there is a balance between the number of networks that we can create and the number of hosts that each network can support. Variable length sub-net masking or VLSM leverages this principle to the fullest. With this approach, you take one of your unused subnets and you further subnet it in order to create more networks and of course, with fewer hosts on each of those networks. But that's exactly what you're looking for. Going back to our previous example, let's say we've used three of our four networks but not the fourth. So you can see the 10.192 network is unused. Let's use that one to create even more networks. So I will do 10.192.0.0 with a mask of 255.224.0.0. This allows me to create eight new networks and each of these new networks can support about…
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