Network Design May 2026

Moving away from "trusting everyone inside the building" to a model where every user and device must be continuously verified.

The "highway" of the network. Its sole purpose is to switch traffic as fast as possible. It avoids complex packet manipulation to maintain maximum speed. network design

A "solid" design anticipates growth. This involves using modular hardware and a structured IP addressing scheme (IPv6 or CIDR) that allows for easy expansion without reconfiguring the entire system. Moving away from "trusting everyone inside the building"

Using VLANs to isolate sensitive departments (like Finance or R&D) from the rest of the network. This prevents "lateral movement" if one device is compromised. It avoids complex packet manipulation to maintain maximum

High availability is non-negotiable. Designers use dual-homing (connecting a switch to two upstream devices) and protocols like STP (Spanning Tree Protocol) or LACP (Link Aggregation Control Protocol) to ensure that if one cable or switch fails, the network stays live.

Modern networks assume the perimeter is porous. Design-level security includes:

We are moving away from purely hardware-centric designs toward . SD-WAN allows companies to manage their network via software, automatically routing traffic over the most efficient path (e.g., using a cheap internet connection for basic apps and a private line for critical data). Additionally, "Hybrid" designs now integrate local office hardware seamlessly with cloud providers like AWS or Azure, treating the cloud as an extension of the local data centre. Conclusion