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A subnet is a smaller, logically divided segment of a larger network, used to organize and isolate groups of devices.
Why Divide a Network at All
Subnetting improves security (isolating groups of devices from each other), reduces network congestion, and makes large networks easier to manage and troubleshoot.
A Practical Example
A hosting provider might place customer-facing web servers on one subnet and internal management systems on another, so a compromise on one side doesn't automatically expose the other.
Where You'll Encounter It
Most individual hosting customers never need to configure subnets directly — it's primarily relevant for VPS/dedicated server users setting up private networking between multiple servers.
