Subnetting Mastery
Master IP subnetting from basic CIDR notation to complex VLSM designs. Practice problems and real-world network design scenarios.
CIDR Notation Guide
Understand CIDR notation, how to read it, and how it replaced classful addressing.
5 min readSubnet Masks Explained
How subnet masks work at the binary level to separate network and host portions of an IP address.
6 min readVLSM Network Design
Design efficient networks using Variable-Length Subnet Masking to minimize address waste.
6 min readSupernetting & Route Aggregation
Learn how supernetting combines multiple smaller networks into a single route to reduce routing table size and improve network efficiency.
9 min readIPv4 Subnetting Practice Problems
Work through 10 real-world subnetting problems with step-by-step solutions covering address calculations, subnet sizing, and host ranges.
14 min readPrivate IP Ranges & RFC 1918
A complete reference to private IP address ranges, their intended uses, and how they interact with NAT, routing, and network design.
8 min readClassful vs Classless Addressing
Understand the evolution from classful IP addressing (Class A/B/C) to classless CIDR, and why the transition was critical for the internet's survival.
8 min readVLSM Design Examples for Enterprise Networks
Learn Variable Length Subnet Masking (VLSM) through practical enterprise design scenarios with step-by-step allocation examples.
10 min readSubnetting for IPv6: /48 to /64 and Beyond
Learn how IPv6 subnetting differs from IPv4. Understand the /48 to /64 hierarchy, site prefixes, and why a /64 is the standard subnet size.
9 min readNetwork Design for Small Business
A practical guide to designing IP networks for small businesses, covering subnet sizing, VLAN segmentation, DHCP scoping, and growth planning.
10 min readIP Addressing Plan Template
A complete IP addressing plan template for enterprise networks, covering documentation standards, allocation strategies, and IPAM best practices.
9 min readSubnetting Cheat Sheet and Quick Reference
A comprehensive subnetting cheat sheet covering CIDR notation, subnet masks, host counts, and quick-reference tables for IPv4 and IPv6.
6 min read