AZ-700 Question 169
Single answerYou manage a microservices-based application running on Azure Virtual Machine Scale Sets in three different availability zones within the same region. Your solution requires advanced metrics, zone redundancy for high availability, and inbound NAT rules for troubleshooting. Which Azure Load Balancer SKU and tier should you use to meet all these requirements?
- A
A Basic SKU public Load Balancer with a single availability zone deployment
- B
A Standard SKU public Load Balancer with a zone-redundant deployment in the same region
- C
A Basic SKU internal Load Balancer across all three availability zones
- D
A Standard SKU cross-region Load Balancer for distributing traffic globally
Show answer and explanation
Correct answer: B
Explanation
When you need advanced features like zone redundancy, comprehensive diagnostics, and inbound NAT rules within the same region, the Standard SKU Load Balancer is the recommended choice. Basic SKU Load Balancers do not provide the same level of metric collection, security integration, or zone redundancy. Although cross-region load balancing is possible with the Standard SKU, it is intended for distributing traffic across multiple regions rather than ensuring high availability within a single region. Refer to Microsoft� documentation on 'Standard Load Balancer' for further details and best practices.
- A. Incorrect.
Option A is incorrect because the Basic SKU does not support advanced metrics to the extent required and only offers limited zone redundancy features. Basic Load Balancers are also typically scoped to a single availability zone if used with zone-based deployments.
- B. Correct.
Option B is correct because the Standard SKU supports advanced metrics, zone redundancy within the same region, and inbound NAT rules. This setup meets the requirement for high availability across multiple availability zones and offers additional diagnostic capabilities that Basic SKU does not provide.
- C. Incorrect.
Option C is incorrect because, while an internal Load Balancer can route traffic within a virtual network, the Basic SKU still lacks the advanced diagnostics, zone redundancy, and more granular connectivity features that the Standard SKU provides.
- D. Incorrect.
Option D is incorrect because cross-region load balancing is meant for global distribution across regions rather than high availability within the same region. It also would be an overreach for an application that must remain within a single region but across multiple availability zones.