In which scenario you need to create multiple Azure Virtual Networks and Subnets?

Question

如果有人可以给我一个行业示例，说明为什么我们需要多个虚拟网络和子网？

Answer 1

One vnet cannot span subscriptions or regions. So everytime you need services deployed in to vnets in different subscriptions or in different regions you would need multiple vnets. Multiple subnets are often used to separate workloads for security reasons. Making sure services on different subnets cannot communicate with eachother or only communicate over controlled ports.