CIDR Explained

CIDR (Classless Inter-Domain Routing) is one of the most important networking concepts to master—whether you're studying for a certification or building a foundation in IT and cybersecurity. In this video, we break down what CIDR is, how subnet notation works, and why it replaced the old class-based addressing system. You'll learn: What the "/24" notation actually means How to calculate available hosts in a subnet How CIDR improves IP address efficiency Real-world examples you'll see in networking and security Perfect for beginners working toward Network+, Security+, or anyone strengthening their networking fundamentals. 🐝 Subscribe to BeeBit for more bite-sized IT and cybersecurity education.