Among the following options, () is a narrowband wireless IoT solution based on 3GPP standards developed specifically for the industrial IoT market?

• A.Z-Wave
• B.eLTE-loT
• C.Wifi
• D.PLC-IoT

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Different home appliances in a smart home come from different manufacturers, so they cannot exchange information.

• A.True
• B.False

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SoftRadio is only used in test scenarios and does not allow access to the customer's existing network and commercial use.

• A.False
• B.True

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Among the following options, the security technology suitable for use on simple terminal devices is ()? (Multiple)

• A.Authentication
• B.Encryption
• C.VPN
• D.PSK

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Which of the following descriptions about ZigBee is wrong?

• A.ZigBee low-power local area network protocol based on IEEE802.15.4 standard
• B.ZigBee works in the unlicensed frequency band
• C.ZigBee is widely used in industrial and smart home fields
• D.ZigBee is a long-distance, low-power wireless communication technology

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