Under the trend of the industry's digital revolution, what are the five key challenges facing the "smart Internet of Things" network edge green? (Multiple choice)

• A.Massive and heterogeneous connections
• B.Data optimization
• C.Business real-time
• D.Application intelligence
• E.Security and privacy

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Which of the following disaster recovery solutions does RDS for MySQL support? (Multiple choice)

• A.Same as AZ active/standby architecture
• B.Cross-AZ active/standby architecture
• C.Cross-AZ three-node architecture (financial version)
• D.Cross-Region Disaster Recovery

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Tenants can complete data archiving based on the HUAWEI CLOUD object storage service.

• A.False
• B.True

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Which one of the end-side devices currently supported by the HiLens platform is not included?

• A.Non-Hisilicon chip camera
• B.All HiSilicon chip equipment
• C.Android devices
• D.HiLens Kit

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Which of the following types of protocols does the listener of the ELB instance support? (Multiple choice)

• A.HTTP/HITPS
• B.UDP
• C.ICMP
• D.TCP

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