Final Answer:
Create a subnet within an Azure Virtual Network using a Classless Inter-Domain Routing (CIDR) block of at least /27, providing 32 available addresses to accommodate the 30 virtual machines.
Step-by-step explanation:
To facilitate 30 virtual machines in an Azure Virtual Network, establishing a subnet is essential. Utilizing CIDR notation, opt for a subnet size that offers enough IP addresses to cover the required number of machines.
In this scenario, selecting a CIDR block of /27 ensures 32 available addresses, sufficient for the 30 virtual machines with a couple of addresses for potential expansion or system needs.
This subnetting approach allocates 30 usable IP addresses for the virtual machines, leaving room for potential scaling or additional network requirements without compromising the existing setup. It ensures efficient utilization of IP addresses while providing the necessary capacity for the machines in the subnet.