In the previous posts, we looked at what an IPv4 address is and how it is used. Subnetting builds on that foundation and plays a major role in IP addressing, but many learners find it challenging at first.I was in the same boat at first. Now, it is a breeze. What has helped me, and how can you fly through subnetting? In this post, we will specifically focus on how classless addressing and variable length subnet masking is implemented within networks. If you would like to learn more about subnetting or need a refresher, see my other posts Subnets: Key to Network Organization and Subnetting Tips . Classful vs Classless What's the difference between these two addressing schemes? Let me ask you this: Have you ever tried on clothes and never could find the right size? It is too big or too small. The store doesn't have your size. What if you can get it tailor-made just for you? Now imagine you could design a subnet the same way you design a custom sh...