After stopping an Alibaba Cloud Elastic Compute Service (ECS) instance, since the ECS instance is stopped, you will not be charged for anything related to that ECS instance until you start the instance again regardless of which region the instance is located in.

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When using Alibaba Cloud SLB, users can enable the health check function. If a backend ECS instance A is running abnormally, SLB will isolate it and forward the requests to other ECS instances, and when the backend ECS instance A is back to normal, SLB will again forward requests to it.

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After activating an Alibaba Cloud Elastic Compute Service (ECS) instance, you want to monitor the status of the ECS instance via Alibaba Cloud console. Therefore, you must activate and purchase Alibaba Cloud CloudMonitor service to meet this demand.

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Alibaba Cloud Security Center provides brute force password cracking protection. Therefore, users having activated Security Center neither need to modify the administrator password of their ECS instances periodically nor need to set a complicated password.

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Many of Alibaba Cloud services provide highly reliable data storage capacity. For example, Object Storage Service (OSS) promises that its data reliability is no less than 99.99999999%. This high data reliability is solely achieved by RAID 0+1 redundancy technology.

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Alibaba Cloud SLB can distribute user requests to backend ECS instances. These ECS instances must have the same specification (CPU, Memory).

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Alibaba Cloud Content Delivery Network (CDN) is a distributed network that is built and overlaid on the bearer network. Moreover, it is composed of edge node server clusters distributed across different

regions.

It replaces the traditional data transmission mode, which is centered on Web servers. CDN acceleration is especially suitable for scenarios where there is significant site traffic and the static resource is repeatedly used by different users. The higher the repeated access rate, the more significant the acceleration effect.

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RDS instances are automatically created in master-slave mode without any extra costs or associated configuration.

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0n an Alibaba Cloud Elastic Compute Service (ECS) instance, if you change the MAC address of the NIC within the operating system, this may result in network connection failure.

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All versions of Alibaba Cloud RDS uses master-slave mode to ensure high availability. When the master database fails, RDS will switch to the standby database within 30 seconds.

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