Understanding Azure Virtual Network

The first step in the transition from an on-premises environment to the cloud is Infrastructure as a Service (IaaS). One of the key elements of IaaS is Virtual Networks (VNets). VNets are a virtual representation of our local network with IP address ranges, subnets, and all other network components that we would find in local infrastructure. Recently, we have seen a lot of cloud network components introduced to on-premises networks as well, with the introduction of Software-Defined Networking (SDN) in Windows Server 2016.

Before we start looking at VNet security, let's remember that naming standards should be applied to all Azure resources, and networking is no exception. As environments grow, this will help you have better control over your environment, easier management, and more insight into your security posture.

Each VNet that we create is a completely isolated piece of a network in Azure. We can create multiple VNets inside one subscription...