The controller is the core component of SDN. The controller connects to the device through the southbound interface. Which of the following belong to the controller southbound protocol? (Multiple Choice)

• A.NETCONF
• B.PCEP
• C.SNMP
• D.OpenFlow

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Which of the following descriptions about Trunk port and Access port is correct?

• A.Trunk port can only send untagged frames
• B.Access port can only send untagged frames
• C.Trunk port can only send tagged frames
• D.Access port can only send tagged frames

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A device has been configured to complete the Telnet configuration. The device login address is 10.1.1.10. The Telnet user name is admin and the password is Huawei@123. Which of the following is the correct way to log in to this device using telnetlib?

• A.telnetlib.Telnet （ 10.1.1.0,23,admin,Huawei@123 )
• B.telnetlib.Telnet （ 10.1.1.0,admin )
• C.telnetlib.Telnet （ 10.1.1.0 )
• D.telnetlib.Telnet （ 10.1.1.0,23, Huawei@123 )

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In the VRP interface, use the command startup saved-configuration backup.cfg to configure the startup.cfg file for the next startup.

• A.FALSE
• B.TURE

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

• A.FALSE
• B.TURE

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