Google Professional Cloud Network Engineer Question 10
Select 2Google Cloud PlatformYour company runs a global e-commerce platform hosted on Google Cloud. To ensure high availability and disaster recovery, you need to design your network architecture to handle regional failures and scale during traffic spikes. The application is deployed across multiple regions using a global load balancer. Which of the following actions should you take to meet these requirements?
- A
Configure a Cloud DNS policy to route traffic based on user proximity to the closest regional deployment.
- B
Enable session affinity for the global load balancer to ensure consistent user experience during failover.
- C
Set up backend services with health checks to automatically detect regional failures and reroute traffic.
- D
Deploy Cloud Spanner in a single region to maintain consistency and reduce costs.
- E
Use autoscaling for backend VMs in each region to handle traffic spikes dynamically.
Show answer and explanation
Correct answers: C, E
Explanation
To design for high availability, failover, disaster recovery, and scale, it is critical to set up health checks for your backend services to detect and handle regional failures and to use autoscaling to dynamically handle traffic spikes. These features combined with a global load balancer ensure that your application remains available and responsive during regional outages and sudden increases in traffic. The other options either do not address the scenario requirements or could introduce limitations that compromise disaster recovery and high availability.
- A. Incorrect.
Cloud DNS policies are unrelated to the global load balancer. The global load balancer already has built-in mechanisms to route traffic based on proximity and health, so this is not necessary.
- B. Incorrect.
Session affinity ensures that a user is directed to the same backend instance for stateful applications, but it is not required for handling failover or disaster recovery. It can also reduce failover efficiency in some scenarios.
- C. Correct.
Health checks are essential for detecting unhealthy backend services or regions. The global load balancer uses health checks to automatically reroute traffic to healthy instances or regions, ensuring high availability.
- D. Incorrect.
Deploying Cloud Spanner in a single region would not meet disaster recovery or high availability requirements. For global resilience, Cloud Spanner must be deployed across multiple regions.
- E. Correct.
Autoscaling ensures that backend VMs can handle variable traffic, such as traffic spikes, by automatically adjusting capacity. This is crucial for scalability.