UDP cannot guarantee the reliability of data transmission, and does not provide the functions of message sequencing and flow control. It is suitable for flows with low transmission reliability requirements but high transmission speed and delay requirements.

• A.False
• B.True

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The RSTP protocol uses the P/A mechanism to speed up the speed of the upstream port to the Forwarding state, but what is the reason why there is no temporary loop?

• A.Edge ports are introduced
• B.Speed up port role election
• C.Shorten the time of Forward Delay
• D.Through the synchronization mechanism to ensure that no temporary loop occurs

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Which statement about the Hybrid port is correct?

• A.Hybrid port can strip TAG of VLAN in the direction of the interface
• B.Hybrid port does not require PVID
• C.Hybrid port only receives data frames with VLAN TAG
• D.When the Hybrid port sends data frames, it must carry VLAN TAG

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As shown in the figure, the switch runs STP with default parameters, which of the following ports will be elected as the designated port?

• A.G0/0/1 port of switch A
• B.HUB's G0/0/2 port
• C.HUB's G0/0/1 port
• D.Port G0/0/2 of switch A

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Which of the following is not the reason for RSTP improving the convergence speed?

• A.Forward Delay canceled
• B.P/A mechanism
• C.Introduction of edge ports
• D.Fast switching of the root port

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