Alibaba Cloud Certified Associate – Cloud Computing — Question 27

Multiple lower-configuration I/O-optimized ECS instances can be used with ___________ to deliver a high-availability architecture.

Answer options

• A. Server Load Balancer
• B. RDS
• C. Auto Scaling
• D. OSS

Correct answer: A

Explanation

The correct answer is A, Server Load Balancer, as it distributes incoming application traffic across multiple instances, ensuring high availability. Options B (RDS) and D (OSS) are services that provide database and object storage functionalities, respectively, but do not directly contribute to load balancing. Option C (Auto Scaling) is related to scaling instances but does not specifically address high availability through traffic distribution.