Subnetting and CIDR in Depth
Master variable-length subnet masking and CIDR notation to plan address space, calculate ranges, and aggregate routes efficiently.
Why Subnetting Matters
Subnetting splits a large network into smaller, manageable segments. It improves security, performance, and address efficiency.
CIDR (Classless Inter-Domain Routing) replaced rigid class A/B/C boundaries with flexible prefix lengths.
CIDR Notation
A CIDR block is written as address/prefix. The prefix counts the number of leading network bits.
192.168.1.0/24— 24 network bits, 8 host bits10.0.0.0/8— 8 network bits, 24 host bits
All lessons in this course
- IPv6 Addressing & Concepts
- Advanced Routing Protocols (RIP/OSPF)
- Network Address Translation (NAT)
- Subnetting and CIDR in Depth