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GlossaryConcept

Azure Virtual Network(VNet)

An Azure Virtual Network is a private network boundary in Azure where resources can communicate through subnets, routing, peering, and security controls.

Azure Virtual Network (VNet) is the basic private networking unit in Azure. A VNet contains address ranges and subnets, and Azure resources attach to those subnets.

Most real Azure designs end up caring about VNets quickly. You need them for private connectivity, firewall routing, peering, private endpoints, VPNs, ExpressRoute, and many managed services.

The trap is address planning. A quick /24 looks harmless until you need more subnets, peering, or a connection back to an on-premises range that overlaps. Work out the CIDR ranges before the portal clicks begin.