AZ-700 Question 125
Select 2You are designing an ExpressRoute solution for a multinational organization that needs cross-region connectivity, redundancy, and disaster recovery. The organization has primary workloads in East US and secondary workloads in Central US. They also require traffic flow between East US and Central US over the same ExpressRoute circuits and a backup path for on-premises connectivity in case the primary region fails. Which two design steps should you implement to meet these requirements?
- A
Provision an ExpressRoute circuit with the Premium add-on and enable ExpressRoute Global Reach for on-premises sites across both regions.
- B
Deploy dedicated ExpressRoute Gateways in both East US and Central US to ensure each region has independent connectivity to on-premises networks.
- C
Use only VNet peering between East US and Central US VNets without ExpressRoute, ensuring the peering is configured to provide cross-region redundancy.
- D
Set up a single ExpressRoute Gateway in East US for both regions and rely on a VPN Gateway in Central US as the fallback for disaster recovery.
Show answer and explanation
Correct answers: A, B
Explanation
For cross-region connectivity and disaster recovery with ExpressRoute, it is best practice to deploy gateways in each region that requires direct on-premises connectivity. The Premium add-on extends connectivity across Azure regions, and ExpressRoute Global Reach can tie on-premises sites together if needed. By placing ExpressRoute Gateways in both East US and Central US, you ensure high availability, redundancy, and full DR capabilities. For more details, refer to Microsoft� documentation on ExpressRoute design and the Premium add-on at https://learn.microsoft.com/azure/expressroute/expressroute-about-documentation.
- A. Correct.
Correct. Using the Premium add-on for the ExpressRoute circuit allows global connectivity between Azure regions. Enabling ExpressRoute Global Reach further extends your on-premises network by connecting multiple branch locations across the same private connectivity. This setup ensures seamless cross-region traffic flow and robust redundancy.
- B. Correct.
Correct. Deploying independent ExpressRoute Gateways in each Azure region ensures each region can maintain a direct on-premises connection. If the primary region� circuit or gateway fails, traffic can fail over to the other region without interruption, thereby satisfying disaster recovery requirements.
- C. Incorrect.
Incorrect. VNet peering alone provides region-to-region traffic within Azure, but does not extend to on-premises. It neither replaces the need for ExpressRoute connections nor provides the dedicated private bandwidth required for redundancy and DR scenarios.
- D. Incorrect.
Incorrect. Relying on a single ExpressRoute Gateway in East US and a VPN Gateway in Central US introduces inconsistent performance and does not provide a fully redundant ExpressRoute path in Central US. This design does not meet the requirement of having ExpressRoute connectivity for both the primary and secondary regions.