AZ-305 Question 234
Single answerContoso is hosting its main e-commerce application on Azure in the East US region. Customers in Europe and Asia have recently reported increased latency when accessing the site. The solution must maintain high availability and minimize response times globally. Which approach should you recommend to optimize network performance?
- A
Upgrade the East US virtual machines to a higher SKU for more compute power
- B
Deploy Azure Front Door to serve traffic from PoPs nearest to users
- C
Implement a VPN gateway between the East US region and on-premises networks
- D
Use an internal Azure Load Balancer configured with multiple backend pools
Show answer and explanation
Correct answer: B
Explanation
To optimize network performance for global users, you need to distribute traffic so it terminates in a location nearest to the end user. Azure Front Door offers layer 7 routing and caching at PoPs around the world, reducing latency and improving availability. Refer to the Azure Front Door documentation (https://learn.microsoft.com/azure/frontdoor/front-door-overview) for details on global load balancing and performance optimization.
- A. Incorrect.
Option 1: Upgrading VM SKUs can help address resource constraints (CPU, memory), but it does not address global network latency. Latency improvements require distributing or fronting the application closer to users, which simply upgrading VMs won't accomplish.
- B. Correct.
Option 2: Deploying Azure Front Door provides global load balancing, routing users to the closest Point of Presence (PoP). It reduces latency by using Microsoft's global infrastructure, improving performance and availability across regions. This aligns with best practices for globally distributed applications.
- C. Incorrect.
Option 3: A VPN gateway is used for site-to-site connectivity between on-premises and Azure. It does not reduce end-user latency across geographies; it is more about secure connectivity rather than distributing traffic globally to minimize latency.
- D. Incorrect.
Option 4: An internal Azure Load Balancer is scoped to a single virtual network or region and does not provide global routing or PoP-based distribution. It cannot significantly improve latency for users in Europe or Asia accessing the East US region.