Network segmentation explained for non-technical leaders

What it is, why it matters, and what to ask your IT provider.

What is network segmentation?

We use network segmentation is multi-let buildings so that each tenant is protected from other tenants.

Why it matters for your business

Without segmentation, a single compromised device can move laterally across your entire network — accessing file servers, CCTV systems, printers, and anything else connected. For businesses with CCTV, access control, or IoT devices, this is a serious risk.

Segmentation also helps with compliance. If you need Cyber Essentials certification or handle sensitive client data, being able to demonstrate network separation is a requirement, not a nice-to-have.

What to ask your IT provider

Start with these questions: Are our security cameras on the same network as our business PCs? Can a guest WiFi user reach our file server? Do we have separate VLANs for different departments or device types? If your provider can't answer clearly, that's a red flag.

How WN1 approaches segmentation

We design VLAN structures based on device type and risk profile — not just convenience. Corporate devices, CCTV, access control, guest WiFi, and IoT each get their own segment with clear firewall rules between them. We document everything and review it quarterly.

Key takeaway

Network segmentation separates your business devices, security systems, and guest WiFi into isolated zones — reducing risk and supporting compliance. If your IT provider hasn't discussed this with you, it's worth asking why.