Glossary infra Term Page
Subnet
A smaller logical address segment carved out of a larger IP network
Core Idea
A subnet is a logical slice of an IP network with its own address range and broadcast boundary. It tells you which devices belong to the same local segment, when routing becomes necessary, and how DHCP scopes should be split.
Why It Matters Here
Mathbong uses subnets repeatedly in OPNsense LAN design, VLAN segmentation, and VPN ranges. It is the first language for treating a network as multiple policy zones instead of one flat space.