As shown in the figure, two switches use the default parameters to run STP root primary; Switch B uses the configuration command STP priority 0. Then which port will be blocked? () (Single-choice question)

• A.B. G0/0/2 of switch A
• B.C. G0/0/1 of switch A
• C.D. G0/0/1 of switch B

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When the switch port receives a data frame that does not carry VLAN TAG, it must add PVID. ()

• A.True
• B.False

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Two switches use manual link aggregation at the same time. The following statement is wrong. () (Single- choice question)

• A.Turn off the G0/0/1 and G0/0/2 ports on switch B, and the Efh-Trunk status is still UP
• B.C. Only switch off G0/0/1 port on switch B. The Eth-Trunk status is still UP
• C.Only switch off G0/0/2 port on switch B. The Eth-Trunk status is still UP
• D.D. Turn off the G0/0/1 and G0/0/2 ports on switch B. The Eth-Trunk status is down

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The two switches shown in the figure below have both enabled the STP protocol. Which port will eventually be in the Blocking state? ()

• A.SWA's G0/0/2 port
• B.SWA's G0/0/3 port
• C.G0/0/3 port of SWB
• D.G0/0/2 port of SWB

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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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