In this module, we’ll break down subnetting and why it’s essential. To get started, let’s think back to our last lesson about IP addresses. We learned about different classes of IP addresses, each suited to specific network sizes. However, this system had limitations, allowing only about 2 million networks.

As technology grew, we needed a way to create more networks efficiently. That’s where subnetting comes in, and in 1985, RFC 950 laid the groundwork. In this module, we’ll focus on subnetting, starting with the basics.

We’ll explore subnet masks, which help us expand our networks. Then, we’ll uncover the “Anding” technique, which lets us identify network addresses accurately.

To ensure you master subnetting, we’ll provide practical demonstrations. By the end of this Module, you’ll be proficient in subnetting, ready to tackle networking challenges.