What kind of message does the OSPF protocol use to confirm the received LSU message?

• A.LSACK
• B.LSA
• C.LSU
• D.LSR

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The MAC address table of a certain switch is shown in the figure. If the switch receives a data frame with a destination MIAC of 5489-9885-18a8 from port Eth0/0/2, which of the following statements is correct?

• A.Discard this data frame
• B.Forward this data frame from the Eth0/0/2 port
• C.Forward this data frame from Eth0/0/1 port
• D.Flood this data frame

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The switch becomes a logical switch after stacking and clustering, and Eth-Trunk across physical devices can be deployed to improve network reliability.

• A.False
• B.True

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The role of the collaboration layer in the SDN architecture is to complete job deployment based on user intentions. OpenStack belongs to the business collaboration layer.

• A.FALSE
• B.TURE

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What is the function of the command port trunk allow pass vlan all? ()

• A.The opposite port connected to the port must be configured with port trunk permit vlan all at the same time
• B.If the port default vlan3 command is configured for the connected remote device, VLAN3 cannot communicate between the two devices
• C.All VLAN data frames are allowed to pass through this port
• D.The connected peer device can dynamically determine which VLAN IDs are allowed.

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