CIDR notation
Configuring and Verifying IPv4 Addressing and Subnetting
Domain 1.6 | Network Fundamentals — 20% of exam Learning Objectives By the end of this lesson, you will be able to: Key Terms Term Definition Subnet mask A 32-bit value marking which bits of an IP address identify the network versus the host CIDR notation Shorthand for a subnet mask, written as a slash...
Classful vs. Classless IP Addressing: A Complete CCNA Guide
IP addressing is the foundation of every network. Every device — a laptop, a server, an IoT sensor — needs an IP address to send and receive data. But the way those addresses are organized has changed fundamentally since the early internet. The original system, classful addressing, divided the address space into rigid classes and...
Introduction to Subnetting: How and Why to Divide a Network
Subnetting lets a network administrator divide a large network into smaller, more manageable sub-networks by borrowing bits from the host portion of an IP address. Rather than running one enormous flat network, subnetting adds a third level to the addressing hierarchy, network, subnetwork, and host, giving administrators far more control over how a network actually...