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

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The Priority field in the VLAN tag can identify the priority of the data frame. What is the range of this priority?

• A.0-63
• B.0-15
• C.0-7
• D.0-3

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Which of the following IPv6 is a global unicast address?

• A.FF::02::2E0:FCFF:FEEF:FEC
• B.FEE:FCFF:FEEF:FEC
• C.2001::12:1
• D.FF02::1

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In the network shown in the figure below, all routers run OSPF protocol, which device is ABR? (Multiple choice)

• A.Router C
• B.Router B
• C.Router A
• D.Router D

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Complete the ACL configuration shown in the figure on the router RTA, which of the following description is correct?

• A.The VRP system will not adjust the sequence number, but will first match the rule permit source 20.1.1.0 0.0.0.255
• B.The VRP system will first match the rule by numbering in sequence deny source 20.1.1.0 0.0.0.255
• C.Configuration error, the sequence number of the rules must be configured from small to large
• D.The VRP system will adjust the sequence number of the first rule to 5 according to the configuration sequence

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