A company uses Alibaba Cloud SLB with a layer 7 Listener and Auto Scaling at the same time, hoping this combination can help reduce O&M costs and provide a stable and reliable system.

A company uses Alibaba Cloud SLB with a layer 7 Listener and Auto Scaling at the same time, hoping this combination can help reduce O&M costs and provide a stable and reliable system.

However, because they do not have experience with Alibaba Cloud, the company’s engineers listed some precautions they think they should take, and have given you the list to ask for your advice.

As an Alibaba Cloud expert, you tell them that only ______is a valid concern. (Single answer)
A . SLB instances must have Health Check enabled, or they cannot be used together with Auto Scaling
B . All ECS instances under the same SLB instance must be running the same operating system
C . All backend servers under the same SLB instance must be in the same Scaling Group
D . All backend servers under the same SLB instance must have the same configuration

Answer: A

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