AZ-900 Practice Question 26: Virtual Networks
Microsoft Azure Fundamentals (AZ-900) · Test 3 · question 6 of 10
A team is moving three servers into Azure virtual machines. The VMs must reach each other privately, reach the internet outbound, and eventually connect back to the on-premises network. Which resource is the fundamental building block they have to create first?
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Answer:
Azure Virtual Network is described as *the fundamental building block for your private network in Azure*. It is what lets VMs communicate securely with each other, with the internet, and with on-premises networks, all three requirements in the stem, and VMs are deployed into a subnet of a virtual network, so nothing else can be configured until it exists.
Option A, a load balancer, distributes incoming traffic across several instances. It is a reasonable later addition but it provides no private connectivity of its own and it needs a virtual network to live in. Option B, a network security group, filters traffic by source and destination address, port, and protocol; it is attached to a subnet or a network interface, both of which presuppose the virtual network. Option D, ExpressRoute, is one way to reach on-premises over a private connection rather than the internet, but it is an optional add-on attached to a virtual network and it does nothing for VM-to-VM traffic.
Reference: What is Azure Virtual Network?