IPv4 Subnetting for Beginners: Step-by-Step Examples and Practice Questions Introduction IPv4 subnetting is an important networking skill for IT students and people preparing for certifications such as CompTIA Network+ and Cisco CCNA. Subnetting divides an IP address range into smaller networks. It helps network administrators organize devices, manage IP addresses, and design networks efficiently. In this beginner-friendly guide, you’ll learn how to identify a subnet mask, ...