ANS-C01 Question 425
Select 3Your company is designing a new application in AWS that requires the use of a VPC to host its resources. The application is expected to scale significantly during peak hours, and you need to ensure subnet optimization for both performance and scalability. Which of the following considerations are most important when optimizing your VPC subnets for this application?
- A
Allocate IP address ranges that leave room for future growth in each subnet.
- B
Use a single large public subnet to simplify routing and reduce complexity.
- C
Distribute resources across multiple AZs for high availability.
- D
Ensure the subnets have sufficient IP addresses for the expected EC2 instances and other resources.
- E
Use NAT Gateways and private subnets to restrict internet access for sensitive resources.
Show answer and explanation
Correct answers: A, C, D
Explanation
Subnet optimization requires careful planning of IP address ranges to accommodate future growth, distributing resources across multiple AZs for high availability, and ensuring sufficient IP addresses for current and projected resource needs. These considerations help ensure your VPC and subnets are scalable and resilient to handle the demands of your application while avoiding potential bottlenecks or reconfiguration challenges later.
- A. Correct.
Allocating IP address ranges that leave room for future growth is crucial as applications can grow beyond initial estimates, and reconfiguring subnets later can be complex.
- B. Incorrect.
Using a single large public subnet can simplify routing but negatively impacts security, scalability, and fault tolerance. It's not an optimal approach for most production applications.
- C. Correct.
Distributing resources across multiple AZs ensures high availability and fault tolerance, which is critical for scalable and resilient applications.
- D. Correct.
Ensuring that subnets have sufficient IP addresses is essential to avoid resource constraints, especially for scalable workloads like EC2 instances, load balancers, and other services.
- E. Incorrect.
While using NAT Gateways and private subnets is good for security, it's not directly related to optimizing subnet design for scalability and performance.