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Exam AZ-700 topic 2 question 52 discussion

Actual exam question from Microsoft's AZ-700
Question #: 52
Topic #: 2
[All AZ-700 Questions]

HOTSPOT -

Your company has 40 branch offices across North America and Europe.

You have an Azure subscription that contains the following virtual networks:

• Two networks in the East US Azure region
• Three networks in the West Europe Azure region

You need to implement Azure Virtual WAN. The solution must meet the following requirements:

• Each branch office in North America must have an ExpressRoute circuit and a Site-to-Site VPN that connects to the East US region.
• Each branch office in Europe must have an ExpressRoute circuit and a Site-to-Site VPN that connects to the West Europe region.
• Transitive connections must be supported between all the branch offices and all the virtual networks.
• Costs must be minimized.

What is the minimum number of Virtual WAN resources required? To answer, select the appropriate options in the answer area.

NOTE: Each correct selection is worth one point.

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MrBlueSky
Highly Voted 2 years ago
1 Standard VWAN (all hubs can be connected globally across regions with Standard VWAN) 2 VHUBS (one for each region) 4 Gateways (1 ER Gateway in US, 1 VPNGW in US + 1 ER Gateway in Europe + 1 VPNGW in Europe)
upvoted 54 times
[Removed]
1 year, 12 months ago
Appreciate the proper explanation. vHUB regional based VPN and ER need separate gateways (per vHUB)
upvoted 7 times
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stack120566
Highly Voted 2 years ago
"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." ref: https://learn.microsoft.com/en-us/azure/virtual-wan/virtual-wan-global-transit-network-architecture 1 wan 2 hubs . 2 gateways each gateway supporting the vpn connections to the offices
upvoted 13 times
_fvt
2 years ago
Yes I agree
upvoted 1 times
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BenyIR
2 years ago
it shouldnot be 4 gateways ? since it is said that needs Express route and VPN ? I mean 2 gateways in one hub or to configure both express route and vpn one gateway is enough ?
upvoted 8 times
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bobothewiseman
Most Recent 3 months ago
• Virtual WAN: One Standard Virtual WAN • Virtual WAN hub: Two Virtual WAN hubs • Virtual Network Gateway: Four Virtual Network Gateways Since there are two Virtual WAN hubs, and each requires two Virtual Network Gateways, the total number of virtual network gateways needed is four.
upvoted 1 times
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manny72
8 months, 2 weeks ago
1 Standard VWAN 2 VHUBS connected to the single VWAN
upvoted 1 times
manny72
8 months, 2 weeks ago
2 Vnet GWs - ER and S2S gateway can coexist in the same vnet gateway. To note that a virtual network gateway is not just for VPN. Express route gateway is also a vnet gateway of a different type. So the question is how many for all connections and the key point, like others have pointed out, is that co-existence is possible. https://learn.microsoft.com/en-us/azure/expressroute/expressroute-howto-coexist-resource-manager Said that, Microsoft questions are not well exposed as usual. There are limitations and different case scenarios to use co-existence, and here there are no details to help. But it's generally possible.
upvoted 1 times
manny72
8 months, 1 week ago
Correction, 4 GWs. 2 Gateways (ER and VPN) can coexist on the same subnet but the question is about gateways.
upvoted 2 times
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galahad
1 year, 2 months ago
The answer is 1 Standard VWAN, 2 VHUBs, and 2 VPNGW. The reason why I say 2 VPNGW is because the question is looking for how many VPNGW is needed. VPNGW can only handle S2S connectivity whereas Express Route Gateway will handle Express Route traffic which is a private none encrypted traffic.
upvoted 2 times
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Webesciaki
1 year, 3 months ago
Something is wrong in that question: 1) x1 - Standard vWan for sure 2) considering that each branch supposed to have its own ExR circuit and we don't know their locations there is a limit on it https://learn.microsoft.com/en-us/azure/virtual-wan/virtual-wan-expressroute-about#expressroute-limits-in-virtual-wan Maximum number of circuits in the same peering location connected to the same virtual hub = 4 Maximum number of circuits in different peering locations connected to the same virtual hub = 8 let's assume they are in diff peering locations - that would mean 5 hubs just to cover 40 branches with ExR circuits 3) then I have not clue how to count VNGs - 5 just for ExR + at least 2 for VPNs ?
upvoted 2 times
y0eri
1 year, 3 months ago
They seem to assume you have a Private WAN per region, although this is not mentioned in the question. -> https://learn.microsoft.com/en-us/azure/virtual-wan/migrate-from-hub-spoke-topology#architecture
upvoted 1 times
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Opala79
1 year, 4 months ago
1 standard vwan 2 vhubs 4 gateways https://learn.microsoft.com/en-us/azure/virtual-wan/migrate-from-hub-spoke-topology?source=recommendations#scenario
upvoted 1 times
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Lazylinux
1 year, 9 months ago
Answer is 1 STD VWAN + 2 vHUBS and 4 VPNGWY and ER GWY 1 Standard VWAN as it will cross region support and hence connect both regions 2 vHUBS - each region will require one 4 Gateways - Most people i witnessed get this one wrong even in other questions that related to VPN, one MUST know when you create ER or S2S connection, the gateway for ER and S2S are different and hence you need to create one for each - so here 1 for ER and 1 for S2S in each region so total is 4
upvoted 7 times
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bakamon
1 year, 11 months ago
: One standard virtual WAN : 2 hubs : 4 gateways
upvoted 3 times
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Qunlay
2 years ago
1 Standard VWAN, 2 VHubs, 5 VPNGWs
upvoted 2 times
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Chief_D11
2 years ago
To meet the requirements, you need to create a minimum of 1 Virtual WAN resource, 2 Virtual WAN hubs (one in the East US region and one in the West Europe region), and 5 virtual network gateways (one for each virtual network). Each branch office will connect to the nearest Virtual WAN hub using an ExpressRoute circuit and a Site-to-Site VPN. The Virtual WAN hubs will provide transitive connectivity between all the branch offices and all the virtual networks. The virtual network gateways will be used to connect the virtual networks to the Virtual WAN hubs. This solution minimizes costs by using a single Virtual WAN resource and by connecting each branch office to the nearest Virtual WAN hub.
upvoted 4 times
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khanda
2 years ago
1 Standard vWAN 2 Hubs, one for each region 4 NGWs, which is two on each region, because ER and VPN cant coexist on one gateway.
upvoted 3 times
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manny72
2 years ago
1 Standard VWan - more hubs can coexist in a VWan - https://learn.microsoft.com/en-us/azure/virtual-wan/virtual-wan-faq 2 Hubs, one for each region. 2 GWs - Express Route and VPN GWs can coexist in a Standard VWan - https://learn.microsoft.com/en-us/azure/expressroute/expressroute-howto-coexist-resource-manager
upvoted 6 times
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silvarohit
2 years ago
Standard Virtual WAN - 1 Hub - 2 VPN GW - 4
upvoted 4 times
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MrBlueSky
2 years ago
It's definitely one Standard VWAN and 2 hubs. The question is can a single VNET Gateway support both an ExpressRoute connection and a S2S connection simultaneously? While it doesn't explicitly address this, the documentation seems to suggest that they each need their own Gateway: https://learn.microsoft.com/en-us/azure/expressroute/expressroute-howto-coexist-resource-manager
upvoted 6 times
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