Oracle Cloud Infrastructure 2020 Architect Professional — Question 47

A global retailer is setting up the cloud architecture to be deployed in Oracle Cloud Infrastructure (OCI) which will have thousands of users from two major geographical regions: North America and Asia Pacific. The requirements of the services are:
✑ Service needs to be available 24/7 to avoid any business disruption
✑ North American customers should be served by application running in North American regions
✑ Asia Pacific customers should be served by applications running in Asia Pacific regions
✑ Must be resilient enough to handle the outage of an entire OCI region
To meet this requirement, you have deployed your OCI resources to multiple OCI Regions.
Which solution will deliver traffic with the lowest latency and provide fault tolerance? (Choose the best answer.)

Answer options

• A. OCI DNS, Traffic Management with Geolocation steering policy
• B. OCI, DNS, Traffic Management with Failover steering policy
• C. OCI, DNS, Traffic Management with Load Balancer steering policy, Health Checks
• D. OCI DNS, Traffic Management with Geolocation steering policy, Health Checks

Correct answer: D

Explanation

The correct answer is D because using OCI DNS with Traffic Management and a Geolocation steering policy ensures that users are directed to the closest regional application, reducing latency. Additionally, incorporating Health Checks enhances fault tolerance by ensuring traffic is only sent to healthy instances. The other options either lack health checks or use steering policies that do not optimize for user location or resilience as effectively as option D.