You have several virtual machines, each with a single network interface. The network interface of VM1 has been added to an application security group (ASG1). Which other virtual machines' network interfaces can you add to ASG1?

You can add network interfaces from VMs in the same virtual network or peered virtual networks to an Application Security Group (ASG). This allows you to group network interfaces for security rule enforcement. VM2 and VM3 are in the same virtual network (VNet1) as VM1, making their network interfaces eligible for ASG1. VM4 is in a different virtual network (VNet2) that is not peered with VNet1, so its network interface cannot be added. VM5 is in a different subscription, which also prevents its network interface from being added to ASG1.