Which of the following statements about VLANIF interfaces are correct?

• A.VLANTF interface has no MAC address
• B.VANIF interface does not need to learn MAC address
• C.Different VLANIF interfaces can use the same IP address
• D.VLANIF interface is a three-layer interface

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The wireless access controller (AC, Access Cntroller) is the unified management and control device in the FIT AP architecture. Which of the following description of the role of AC is wrong?

• A.AP configuration delivery
• B.User access authentication
• C.No matter when the data is forwarded, the user's data message will be forwarded by AC
• D.User access control

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The router output information is shown in the figure. Which of the following statements is wrong?

• A.The physical link of the Ethernet0/0/0 interface is normal
• B.The MTU value of the Ethgrnet0/0/0 interface is 1480
• C.The broadcast address corresponding to the Ethernet0/0/0 interface is 10.0.12.255
• D.The IP address of the Ethernet0/0/0 interface is 10.0.12.1/24

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What is the length of the Ethernet_II frame containing the Ethernet header?

• A.64-1518B
• B.64-1500B
• C.60-1560B
• D.46-1500B

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Which of the following description about the Layer 2 Ethernet switch is incorrect?

• A.Forward according to the Layer 2 header information of the Ethernet frame
• B.Able to learn MAC address
• C.Layer 2 Ethernet switches work at the data link layer
• D.It is necessary to make certain modifications to the layer 3 header of the forwarded message, and then forward it

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