Oracle Cloud Infrastructure 2020 Architect Professional — Question 11
You work as a solutions architect for an online retail store creating a portal to allow the users to pay for their groceries using credit cards. Since the application is not fully compliant with the Payment Card Industry Data Security Standard (PCI DSS), your company is looking to use a third-party payment service to process credit card payments.
The third-party service allows a maximum of 5 public IP addresses at a time. However, your website is using Oracle Cloud Infrastructure (OCI) Instance Pool Auto
Scaling policy to create up to 15 instances during peak traffic demand, which are launched in VCN private subnets and attached to an OCI public Load Balancer.
Upon user payment, the portal connects to the payment service over the Internet to complete the transaction
What solution can you implement to make sure that all 15 compute instances can connect to the third party system to process the payments during peak traffic demand? (Choose the best answer.)
Answer options
- A. Route credit card payment request from the compute instances through the NAT Gateway. On the third-party services, whitelist the public IP associated with the NAT Gateway.
- B. Create an OCI Command Line Interface (CLI) script to automatically reserve public IP address for the compute instances. On the third-party services, whitelist the Reserved public IP.
- C. Whitelist the Internet Gateway Public IP on the third party service and route all payment requests through the Internet Gateway.
- D. Route payment request from the compute instances through the OCI Load Balancer, which will then be routed to the third party service.
Correct answer: B
Explanation
Option B is correct because it allows for the allocation of public IP addresses specifically for the compute instances, ensuring compliance with the third-party service's IP limit. Other options either do not address the maximum IP limitation (A and D) or suggest improper routing methods that may not fulfill the requirement (C).