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A Solutions Architect has a multi-layer application running in Amazon VPC. The application has an ELB Classic Load Balancer as the front end in a public subnet, and an Amazon EC2-based reverse proxy that performs content-based routing to two backend Amazon EC2 instances hosted in a private subnet. The Architect sees tremendous traffic growth and is concerned that the reverse proxy and current backend setup will be insufficient. Which actions should the Architect take to achieve a cost-effective solution that ensures the application automatically scales to meet traffic demand? (Select TWO) A. Replace the Amazon EC2 reverse proxy with an EL8 internal Classic Load Balancer B. Add Auto Scaling to the Amazon EC2 backend fleet C. Add Auto Scaling to the Amazon EC2 reverse proxy layer D. Use t2 burstable instance types for the backend fleet E. Replace both the frontend and reverse proxy layers with an ELB Application Load Balancer 很多人说 B , C 另外一些人说A, B 还有人说B, E 真是众说纷纭啊, 我自己觉得B, C是对的, 求大神点拨 |
