Correct Answer: C There can only be one hub per Azure region. It should be 2 Virtual Hubs and 1 WAN. Since we have just two region, it may be impossible to have 3 hubs. Reference: https://docs.microsoft.com/en-us/azure/virtual-wan/virtual-wan-about

They're all wrong because the question says there are 2 Azure regions, and the below documentation says each region only has a single hub... Should be 2 hubs and one WAN. https://docs.microsoft.com/en-us/azure/virtual-wan/virtual-wan-about "Hub: A virtual hub is a Microsoft-managed virtual network. The hub contains various service endpoints to enable connectivity. From your on-premises network (vpnsite), you can connect to a VPN Gateway inside the virtual hub, connect ExpressRoute circuits to a virtual hub, or even connect mobile users to a Point-to-site gateway in the virtual hub. The hub is the core of your network in a region. There can only be one hub per Azure region."

It cannot be 3 birtual WANs. The definition of virtual WAN says: It contains links to all your virtual hubs that you would like to have within the virtual WAN. Virtual WANs are isolated from each other and can't contain a common hub. Virtual hubs in different virtual WANs don't communicate with each other. Also, the definition of virtual hub says: Multiple virtual hubs can be created in the same region. https://learn.microsoft.com/en-us/azure/virtual-wan/virtual-wan-about

The answer is B because Virtual hubs in different virtual WANs don't communicate with each other and Multiple virtual hubs can be created in the same region. To connect these datacenters, virtual hubs must be in the same WAN. Source: https://learn.microsoft.com/en-us/azure/virtual-wan/virtual-wan-about

When multiple hubs are enabled in a single virtual WAN, the hubs are automatically interconnected via hub-to-hub links, thus enabling global connectivity between branches and Vnets that are distributed across multiple regions.

Azure Virtual WAN represents the virtual overlay of the Azure virtual network and other resources. For example: you have an on premise office and want to connect to multiple Virtual networks in Azure, then use Azure Virtual WAN. Virtual hub is a MS managed virtual network (created within Virtual WAN) to which you can connect various end points like P2S, S2S, virtual networks etc

What is the importance of "Each region contains a virtual network. The virtual networks are peered" in the question ?

B is correct

Answer from chatgpt and it makes sense: Option B: Three virtual hubs and one virtual WAN Explanation: Virtual hubs in Azure Virtual WAN provide a central point of connectivity and management for your network resources. By deploying three virtual hubs, one for each office, you establish a direct connection from each datacenter to the Azure Virtual WAN. Azure Virtual WAN is designed to optimize connectivity across regions, helping to minimize network latency between the datacenters and the Azure subscription. By using a single virtual WAN, you can centrally manage and configure the network connections for all three datacenters, streamlining administration and ensuring consistent network policies across the infrastructure. Therefore, option B is the most appropriate choice for minimizing network latency while connecting the datacenters to the Azure subscription.

https://learn.microsoft.com/en-us/azure/virtual-wan/virtual-wan-about

I am not sure I understand the debate. According to ms docs "Virtual WANs are isolated from each other and can't contain a common hub. Virtual hubs in different virtual WANs don't communicate with each other". That would infer that multiple VWANs is not going to work to connect all of these together. https://learn.microsoft.com/en-us/azure/virtual-wan/virtual-wan-about

B: 1 WAN, 3 hubs Virtual WAN: The virtualWAN resource represents a virtual overlay of your Azure network and is a collection of multiple resources. It contains links to all your virtual hubs that you would like to have within the virtual WAN. Virtual WANs are isolated from each other and can't contain a common hub. Virtual hubs in different virtual WANs don't communicate with each other. Hub: A virtual hub is a Microsoft-managed virtual network. The hub contains various service endpoints to enable connectivity. From your on-premises network (vpnsite), you can connect to a VPN gateway inside the virtual hub, connect ExpressRoute circuits to a virtual hub, or even connect mobile users to a point-to-site gateway in the virtual hub. The hub is the core of your network in a region. Multiple virtual hubs can be created in the same region. Reference: https://learn.microsoft.com/en-us/azure/virtual-wan/virtual-wan-about

Three virtual hubs and one virtual WAN)

which genius thought you have multiple WANs in a single hub?

Virtual WAN: The virtualWAN resource represents a virtual overlay of your Azure network and is a collection of multiple resources. It contains links to all your virtual hubs that you would like to have within the virtual WAN. Virtual WANs are isolated from each other and can't contain a common hub. Virtual hubs in different virtual WANs don't communicate with each other. Hub: A virtual hub is a Microsoft-managed virtual network. The hub contains various service endpoints to enable connectivity. From your on-premises network (vpnsite), you can connect to a VPN gateway inside the virtual hub, connect ExpressRoute circuits to a virtual hub, or even connect mobile users to a point-to-site gateway in the virtual hub. The hub is the core of your network in a region. Multiple virtual hubs can be created in the same region. https://learn.microsoft.com/en-us/azure/virtual-wan/virtual-wan-about Based on this, I'd say B : multiple virtual hubs and 1 virtual WAN (august 2023)

As of 20/08/2023: The hub is the core of your network in a region. Multiple virtual hubs can be created in the same region. https://learn.microsoft.com/en-us/azure/virtual-wan/virtual-wan-about#resources Also, creating 3 Virtual WAN doesn't make any sense. when WAN is supposed to be this central management mechanism, where multiple hubs connect to. So 1 WAN with 3 hubs.

C. Three virtual WANs and one virtual hub. Explanation: A virtual WAN is a networking service in Azure that provides optimized and automated branch-to-branch connectivity. It allows you to connect multiple on-premises sites and Azure virtual networks through a hub and spoke topology, providing centralized management and routing. In this scenario, you have three offices located in different cities: Miami, Los Angeles, and New York. Each office has a datacenter. To minimize network latency, you can create a virtual WAN for each office (three virtual WANs in total) and then connect them all using a single virtual hub. By creating three virtual WANs and connecting them through a virtual hub, you can establish a hub and spoke network topology that enables efficient and low-latency communication between the datacenters. This setup ensures that data traffic flows through the optimal path, reducing latency and providing centralized management and routing. Therefore, the correct answer is C. Three virtual WANs and one virtual hub.