Among the following options, which one does not belong to the SDN network architecture?

• A.Device layer
• B.Application collaboration layer
• C.Chip layer
• D.Controller layer

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The campus network can improve network reliability through link aggregation and stacking.

• A.True
• B.False

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Which of the following states does the STP port have a Forward Delay? (Multiple choice)

• A.Blocking-Listening
• B.Forwarding-Disabled
• C.Disabled-Blocking
• D.Learning-Forwarding
• E.Listening-Learning

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Both the pwd and dir commands in the VRP operating platform can view the file information in the current directory.

• A.True
• B.False

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Which of the following options are available for the traffic matching conditions of the firewall security policy? (Multiple choice)

• A.Source and destination IP addresses
• B.Application
• C.Source Destination Security Area
• D.Packet length

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