Azure Virtual Network (VNet)

Correct Answer: 2

Azure Virtual Network (VNet) is the fundamental building block for your private network in Azure. VNet enables many types of Azure resources, such as Azure Virtual Machines (VM), to securely communicate with each other, the Internet, and on-premises networks. VNet is similar to a traditional network that you’d operate in your own datacenter but brings with it additional benefits of Azure’s infrastructure such as scale, availability, and isolation.

Virtual network peering enables you to seamlessly connect two or more Virtual Networks in Azure. The virtual networks appear as one for connectivity purposes. The traffic between virtual machines in peered virtual networks uses the Microsoft backbone infrastructure. Like traffic between virtual machines in the same network, traffic is routed through Microsoft’s private network only.

Azure supports the following types of peering:

– Virtual network peering: Connect virtual networks within the same Azure region.

– Global virtual network peering: Connecting virtual networks across Azure regions.

Take note, the virtual networks you peer with must have non-overlapping IP address spaces.

Hence, the correct answer is: TDVnet3 and TDVnet4 only.

The following options are incorrect because the address space 10.1.0.0/17 of TDVnet2 overlaps with the address space 10.1.0.0/16 of TDVnet1. You need to plan ahead when you create your virtual network address spaces in the event that you will need to peer your virtual networks. You can always change the address space of a virtual network, but you need to make sure that the subnets within it must be contained to the new address space of your virtual network.

– TDVnet2 only

– TDVnet2, TDVnet3 and TDVnet4

– TDVnet2 and TDVnet3 only

References: 
https://docs.microsoft.com/en-us/azure/virtual-network/virtual-networks-overview
https://docs.microsoft.com/en-us/azure/virtual-network/virtual-network-peering-overview

Note: This question was extracted from our AZ-104 Microsoft Azure Administrator Practice Exams.